Dual Diagnosis vs Co-Occurring Disorders: Understanding the Differences

Maybe a psychiatrist mentioned a mood stabilizer and you're trying to understand what that means. Maybe you've read that they help with depression or anxiety and you're wondering whether that's true. Mood stabilizers are a real and important group of medications, but their main job is narrower than a lot of online articles suggest.

According to the NIMH, mood stabilizers are typically used to treat bipolar disorder and mood changes associated with other mental disorders. They are sometimes added to other medications for depression. For anxiety disorders, other medications are usually the first choice.

What are mood stabilizers?

Mood stabilizers are medications that reduce extreme shifts in mood, especially the highs of mania and the lows of bipolar depression, and help prevent new episodes. The main groups are:

• Lithium, which is approved for the treatment of mania and bipolar disorder
• Certain anticonvulsants, medications first developed for seizures, such as valproic acid (Depakote) and lamotrigine (Lamictal)
• Some antipsychotics, which are also used in bipolar disorder, though they aren't always called mood stabilizers

How do mood stabilizers work?

Lithium and the anticonvulsants act on the brain in different ways, which is part of why one person responds to lithium and another to an anticonvulsant. The NIMH notes, for example, that some anticonvulsants work better than lithium for people with "mixed" symptoms of mania and depression or with rapid-cycling bipolar disorder.

What matters most for patients is the effect: fewer and less severe mood episodes over time, rather than an immediate change in how you feel.

What mood stabilizers are used for

Bipolar disorder

This is the main use. According to MedlinePlus, lithium is used to treat and prevent episodes of mania in people with bipolar disorder. The NIMH adds that some studies indicate lithium may reduce the risk of suicide among people taking it for long-term maintenance.

For people with bipolar depression, the NIMH notes that health care providers typically prescribe a mood stabilizer along with an antidepressant to reduce the risk of switching into mania. We cover the full picture in effective bipolar disorder treatment and on our bipolar disorder treatment page.

Depression

The NIMH notes that mood stabilizers are sometimes used to treat depression, usually along with an antidepressant, or to augment the effect of other medications. That's an add-on role for specific situations, not a standard first treatment for depression. If depression has been severe or hard to treat, see what severe depression feels like.

Anxiety

Mood stabilizers aren't a standard treatment for anxiety disorders. According to the NIMH, anxiety is usually treated with antidepressants such as SSRIs and SNRIs, which health care providers typically start with for panic disorder and social anxiety disorder. Other options include buspirone, short-term benzodiazepines, and beta-blockers for physical symptoms. When anxiety comes with bipolar disorder, treating the bipolar disorder often matters most, which is where mood stabilizers come in.

Other uses

The NIMH also lists schizoaffective disorder and impulse-control disorders among the conditions where mood stabilizers are sometimes used.

Common mood stabilizers and their side effects

Lithium

Lithium needs close monitoring. The NIMH notes that people taking it generally have regular blood tests to check lithium levels and kidney and thyroid function, and MedlinePlus lists side effects including increased thirst, weight change, dry mouth, and stomach upset. Keeping lab appointments is part of taking lithium safely.

Lamotrigine (Lamictal)

According to MedlinePlus, lamotrigine is used to lengthen the time between mood episodes in people with bipolar I disorder. It hasn't been shown to treat an episode that's already happening. Its most important warning is a risk of rashes, including serious rashes that may need hospital treatment, which is why it's started at a low dose and increased slowly. MedlinePlus also notes that lamotrigine can make hormonal birth control less effective.

Valproic acid (Depakote)

Valproic acid is used to treat mania in bipolar disorder, according to MedlinePlus. It carries a serious warning for pregnancy: it can cause birth defects affecting the brain and spinal cord and can affect a child's learning and development. MedlinePlus advises women of childbearing age to discuss other possible treatments with their doctor.

Antipsychotics

Several antipsychotics are used in bipolar disorder. Their side effects differ, and some can affect weight, blood sugar, and cholesterol, so physical health monitoring is part of treatment.

Mood stabilizers vs. antidepressants

• Antidepressants treat depression and are also widely used for anxiety disorders. The NIMH notes they usually take 4 to 8 weeks to work.
• Mood stabilizers are mainly used to prevent and treat the highs and lows of bipolar disorder.

The difference matters most when someone might have bipolar disorder. That's why a careful evaluation of mood history, including any past periods of unusually high energy, little need for sleep, or racing thoughts, is an important part of choosing treatment.

What to know before and during treatment

• Finding the right medication can take time. The NIMH notes that it may take several tries to find the medication that works best with the fewest side effects.
• Don't stop suddenly. Changes to mood stabilizers should be made with a health care provider, because stopping abruptly can bring symptoms back.
• Monitoring is part of the treatment. Lithium and several anticonvulsants need regular blood tests.
• Pregnancy planning matters. Some mood stabilizers carry significant pregnancy risks, so family planning belongs in the treatment conversation.
• Supplements aren't substitutes. Herbal products and supplements can interact with psychiatric medications, and none has been shown to replace a mood stabilizer for bipolar disorder. MedlinePlus lists interactions and warnings for common herbs and supplements.

How we approach medication at Amae Health

Bipolar Disorder and Major Depressive Disorder are among the conditions our clinics specialize in. Our psychiatrists manage medication as part of one treatment plan, alongside therapists, primary care physicians, dietitians, and care coordinators, so lab monitoring, side effects, and physical health are tracked together. For people who need more than weekly care, we offer an Intensive Outpatient Program (IOP) and a Partial Hospitalization Program (PHP).

Frequently asked questions

Can mood stabilizers treat anxiety?

They aren't a standard treatment for anxiety disorders. The NIMH lists antidepressants such as SSRIs and SNRIs, buspirone, short-term benzodiazepines, and beta-blockers as the usual options. Mood stabilizers matter most when anxiety occurs alongside bipolar disorder.

Are mood stabilizers used for depression?

Sometimes. The NIMH notes they may be added to an antidepressant to boost its effect, and they're central to treating bipolar depression. They aren't a typical first treatment for depression on its own.

What is the most common mood stabilizer?

Lithium is approved for the treatment of mania and bipolar disorder, according to the NIMH. Lamotrigine and valproic acid are also widely used. Which one fits depends on the person's symptoms, history, and other health factors.

Do mood stabilizers change your personality?

They're meant to reduce extreme mood episodes, not change who you are. If a medication leaves you feeling flat or unlike yourself, that's important to raise with your prescriber, because dose adjustments or a different medication may help.

What happens if you stop taking a mood stabilizer suddenly?

Stopping abruptly can bring mood symptoms back. Any change should be planned with a health care provider.

Key takeaways

• Mood stabilizers are mainly used to treat and prevent the highs and lows of bipolar disorder.
• They're sometimes added to antidepressants for depression, but they aren't a standard treatment for anxiety disorders.
• Lithium may reduce suicide risk with long-term use and needs regular blood tests. Lamotrigine carries a serious rash warning, and valproic acid carries serious pregnancy risks.
• Medication works best with careful monitoring and as part of a broader treatment plan.

If you or someone you love is living with bipolar disorder or depression that hasn't responded to treatment, request an intake appointment. Our team will explain how an evaluation works and what the first visit involves.

Spravato success rate figures are easy to find and hard to compare. In the trial that supported its FDA approval, 69.3% of people who finished 4 weeks of Spravato with a new antidepressant had responded, and 52.5% were in remission. A study of routine care in Italy found 64.2% response and 40.6% remission at 3 months. The numbers answer slightly different questions, but they agree on the essentials: Spravato helps many people with treatment-resistant depression, response is more common than remission, and no single percentage tells the whole story.

Spravato also leaves a real share of people without enough relief.

Spravato is the brand name for esketamine, a nasal spray FDA-approved for treatment-resistant depression: depression that hasn't responded adequately to at least two antidepressants, each given at a proper dose for long enough.

What "Success" Means: Response vs. Remission

Nearly every Spravato statistic comes from one yardstick, the Montgomery-Åsberg Depression Rating Scale (MADRS). It's a 10-item interview a clinician scores from 0 to 60, where higher means more severe, and people entering Spravato's main approval trial averaged about 37. Two thresholds turn that score into a success rate:

• Response means the MADRS score has fallen by at least half from where it started.
• Remission means the score has dropped to 12 or lower, the cutoff the Spravato trials used.

The distance between the two is wide. Someone who starts at 38 and falls to 19 counts as a responder and may still have symptoms that get in the way of work, sleep, or relationships. Remission is the fuller recovery and the harder bar, so every remission figure below sits under its response figure.

Spravato's Success Rate in the Trial Behind Its Approval

The short-term trial that supported FDA approval was TRANSFORM-2, published in The American Journal of Psychiatry in 2019. Researchers at 39 outpatient centers enrolled adults with moderate to severe depression who hadn't responded to at least two antidepressants in their current episode. Everyone switched to a new oral antidepressant. One group also received Spravato, 56 or 84 mg twice a week, and the other a placebo spray. Of 227 people randomized, 197 finished the 4-week double-blind phase, and MADRS scores in the Spravato group fell 4 points more, on average.

The European Medicines Agency's review of the trial data translates that into response and remission:

Look first at the comparison group: more than half of the people who started a new antidepressant with a placebo spray also responded. The trial's finding is the gap. Among people who completed 4 weeks, adding Spravato meant about 17 more responders and 21 more remitters in every 100.

The counting method matters too, and it explains much of the inconsistency online. Figures near 69% count only people who finished. Figures near 63% for response, or 48% for remission, carry forward the last score of everyone who stopped early.

Real-World Success Rates

Trials select their patients carefully and follow them for weeks. Routine care is messier, which is what makes REAL-ESK useful. That 2022 study, published in the Journal of Affective Disorders, reviewed the medical records of 116 people with treatment-resistant depression treated with Spravato at several Italian mental health services, with assessments at 1 and 3 months.

By 3 months, 64.2% had responded and 40.6% were in remission, and both rates had climbed sharply between the first month and the third. The authors called that later response one of the study's novel findings. They also found no difference in effectiveness between people with other psychiatric conditions and people without them.

Lining those numbers up against TRANSFORM-2 doesn't work cleanly. REAL-ESK had no placebo or comparison group, everyone knew they were receiving Spravato, ratings weren't checked for consistency across centers, and 3 months is a different finish line from 4 weeks. It's encouraging evidence from everyday practice, not a controlled measure of effect.

Who Spravato Is Approved and Studied For

Spravato has two FDA-approved uses, built on separate trials, according to its prescribing information:

• Treatment-resistant depression in adults, on its own or with an oral antidepressant. The original 2019 approval required an oral antidepressant alongside it; standalone use was added in January 2025.
• Depression with acute suicidal thoughts or behavior, in adults with major depressive disorder, given alongside an oral antidepressant to treat the depressive symptoms.

The second use came from trials of a different group: adults with moderate to severe depression and active suicidal thoughts with intent, all of whom began with an inpatient psychiatric stay and standard care, and 63% of whom had attempted suicide before. Those results shouldn't be mixed with the treatment-resistant depression results.

The label is explicit about one boundary. Spravato hasn't been shown to prevent suicide or to reduce suicidal thoughts or behavior, and it doesn't replace hospitalization when that's needed, even if someone feels better after the first dose. It isn't approved for children. If suicidal thoughts are part of what you're living with right now, care for suicidal thoughts comes first, and 988 answers calls and texts at any hour.

How Fast Results Typically Appear

Spravato's reputation for speed comes from the first day. In TRANSFORM-2, most of the difference from placebo was already visible at 24 hours, the label reports; both groups kept improving through day 28, and the gap held steady rather than widening. The monotherapy trial behind the 2025 approval showed an effect at about 24 hours that lasted through day 28. In the suicidal-thoughts trials, the difference appeared as early as 4 hours.

Early movement isn't the same as response. In TRANSFORM-2, only 7.9% of people on Spravato had a response that began by day 2 and held through day 28, compared with 4.6% on placebo spray, a difference that wasn't statistically significant in the EMA review. The label calls for judging benefit at the end of the 4-week induction phase, after which sessions drop from twice a week to weekly.

And as REAL-ESK suggests, for some people even 4 weeks is early.

What Affects Individual Success

Research points to a handful of factors linked to outcomes, none of them a forecast for any one person:

• Time on treatment. Benefit is formally assessed after the 4-week induction phase, and in REAL-ESK, many responses and remissions arrived between the first and third month.
• Continuing after a good response. In a maintenance study described in the label, people in stable remission who kept taking Spravato went significantly longer before relapsing than people switched to a placebo spray, and the same held for people in stable response.
• Age. The evidence is weaker in older adults. In a separate short-term trial of adults 65 and older, response at day 28 was 27.0% with Spravato versus 13.3% with placebo spray, and the trial's main measure narrowly missed statistical significance, per the EMA review.
• Other psychiatric conditions. REAL-ESK found people with additional psychiatric diagnoses did as well as people without them.
• With or without an oral antidepressant. Spravato has shown benefit both ways, but no trial in the label compared the two head to head.

Limits and Risks

The same data show where Spravato falls short.

• Many people don't reach remission. Nearly half of the people who completed TRANSFORM-2 on Spravato weren't in remission at day 28, and in REAL-ESK, about six in 10 weren't in remission at 3 months.
• Not every trial was positive. Of the three short-term trials submitted for approval, only TRANSFORM-2 met its main goal. A fixed-dose trial in adults and the trial in older adults both fell short of statistical significance, according to the EMA review.
• It carries a boxed warning for sedation, dissociation, breathing problems (respiratory depression), and misuse or abuse, plus the risk of suicidal thoughts and behaviors that antidepressants carry for children and young adults. Sedation showed up in 48% to 61% of trial participants on Spravato, and dissociation, a sense of detachment that can warp time, space, or surroundings, in 61% to 84%.

Those risks shape how Spravato is given. It's only available through a restricted program called the Spravato REMS. You use the spray yourself under supervision in a certified healthcare setting, your blood pressure is checked before and after, and you're monitored for at least 2 hours before you're cleared to leave. Driving is off-limits until the next day, after a night of restful sleep. People with certain blood vessel problems, including an aneurysm, an abnormal connection between arteries and veins, or past bleeding in the brain, can't take it at all.

Talking to a Psychiatrist About Your Options

A Spravato success rate is a group statistic. It shows that Spravato helps a substantial share of people with treatment-resistant depression and that remission is harder to reach than response. It can't tell you what will happen for you. That depends on your diagnosis, what you've tried and for how long, your medical history, and the rest of your care.

We don't offer Spravato at Amae. Major depressive disorder is among the conditions our clinics specialize in, and when it hasn't eased with medication, our psychiatrists treat it within our integrated care model, which puts psychiatry, medication management, therapy, and primary care on one team. TMS therapy runs at three of our clinics: Los Angeles, Los Altos, and San Mateo. Our comparison of TMS, ketamine, and Spravato and our look at TMS success rates lay out how those options differ. To go over your history with someone who can see all of it, schedule an evaluation with an Amae psychiatrist. Anyone in immediate danger should call 911.

Frequently Asked Questions

What is Spravato's success rate in clinical trials?

In TRANSFORM-2, the short-term trial behind FDA approval, 69.3% of people who completed 4 weeks of Spravato plus a new antidepressant responded and 52.5% reached remission, versus 52.0% and 31.0% with a placebo spray plus a new antidepressant. Counting people who left early, remission was 48.2% versus 30.3%.

Does Spravato work better in real-world use than in trials?

The figures look similar, but they can't be compared directly. REAL-ESK, a study of 116 people treated in routine care in Italy, found 64.2% response and 40.6% remission at 3 months, with no placebo group and a longer follow-up than the 4-week trials.

How fast does Spravato start working?

Average scores often pull ahead of placebo within 24 hours, and in trials of people with suicidal thoughts, within 4 hours. A lasting response that early is uncommon, so benefit is judged after the 4-week induction phase, and some people improve later still.

Does Spravato work for everyone?

No. In TRANSFORM-2, nearly a third of people who completed treatment didn't respond, and nearly half didn't reach remission. Two other short-term trials, including one in adults 65 and older, didn't reach statistical significance on their main measure.

What happens if Spravato doesn't work for me?

A psychiatrist looks at the whole picture again: the diagnosis, whether treatment ran long enough, other medications, and other conditions. Next steps might include a different medication strategy, adding or changing therapy, or another treatment for treatment-resistant depression, such as TMS or ECT.

Is Spravato's success rate different for suicidal depression versus treatment-resistant depression?

Yes, and the two shouldn't be blended. The suicidal-thoughts trials measured average score changes 24 hours after the first dose in hospitalized adults receiving standard care. Spravato lowered depression scores more than placebo, but it didn't improve a rating of suicidality more than placebo, and it hasn't been shown to reduce suicidal thoughts.

Citations

1. Popova V, Daly EJ, Trivedi M, et al. Efficacy and safety of flexibly dosed esketamine nasal spray combined with a newly initiated oral antidepressant in treatment-resistant depression: a randomized double-blind active-controlled study. The American Journal of Psychiatry. 2019;176(6):428-438. https://pubmed.ncbi.nlm.nih.gov/31109201/ (Tier 1)
2. European Medicines Agency. Spravato: EPAR public assessment report (EMA/614876/2019). 2019. https://www.ema.europa.eu/en/documents/assessment-report/spravato-epar-public-assessment-report_en.pdf (Tier 2, regulatory review)
3. Martinotti G, Vita A, Fagiolini A, et al. Real-world experience of esketamine use to manage treatment-resistant depression: a multicentric study on safety and effectiveness (REAL-ESK study). Journal of Affective Disorders. 2022;319:646-654. https://pubmed.ncbi.nlm.nih.gov/36167246/ (Tier 1)
4. U.S. Food and Drug Administration. SPRAVATO (esketamine) nasal spray prescribing information, revised April 2025. https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/211243s019lbl.pdf (Tier 2)
5. 988 Suicide and Crisis Lifeline. https://988lifeline.org (Tier 2)

Maybe a genetic report flagged it. Maybe a friend, a forum, or a supplement ad told you it could explain your fatigue, your depression, or why medication never quite worked. Now you're wondering what an MTHFR gene mutation actually means for you.

MTHFR variants are extremely common. Most people who carry them have no health effects at all, and research linking them to mental health conditions shows a real but small association, not a cause. Medical experts don't recommend routine testing for them.

What the MTHFR gene does

The MTHFR gene carries instructions for an enzyme called methylenetetrahydrofolate reductase. That enzyme converts folate, a B vitamin, into the active form your body uses to turn the amino acid homocysteine into methionine. According to MedlinePlus Genetics, the active form, 5-methyltetrahydrofolate, is the main form of folate found in blood.

When the enzyme works less efficiently, homocysteine can build up. That's the mechanism behind most of the interest in MTHFR, including the mental health questions.

C677T, A1298C, heterozygous, and homozygous

Most people searching "MTHFR gene mutation" are really asking about two common variants:

• C677T. The most common and best studied. At position 677 in the gene, the DNA base C is replaced by T. The resulting enzyme is less stable and less active, especially in people with two copies.
• A1298C. The second common variant. The CDC notes there isn't enough evidence that A1298C on its own significantly affects how the body processes folate.

You inherit one copy of the gene from each parent, which is where the lab terms come from:

• Heterozygous means one copy carries the variant (for C677T, written CT).
• Homozygous means both copies carry it (TT).
• Compound heterozygous means one copy of C677T and one copy of A1298C.

These variants are so common they're closer to normal human variation than to a disease. The CDC reports that more people in the U.S. have one or two copies of C677T than don't. Having both copies is less common: MedlinePlus estimates about 25% of Hispanic people and 10% to 15% of North American white people carry two copies of C677T.

MTHFR symptoms: what the variant does and doesn't cause

Most people with common MTHFR variants have no symptoms. Cleveland Clinic puts it plainly: MTHFR gene variants most often don't affect your health or cause symptoms. When they do matter, it's usually through higher homocysteine or lower folate, and mostly in people with two copies of C677T. Even then, how much folate you get from food matters more than your genotype.

That's different from what you'll read on many wellness sites, which attribute everything from fatigue to brain fog to MTHFR. There's no reliable evidence for a list of "MTHFR symptoms" in people with the common variants. If you have symptoms, they deserve an evaluation, not an assumption that a gene variant explains them.

There is one important exception. Rare, severe mutations in the MTHFR gene cause homocystinuria, a serious inherited condition whose symptoms usually appear early in life. Most U.S. newborns are screened for it shortly after birth. That's a different situation from the common C677T and A1298C variants.

MTHFR and mental health: what research shows

Because MTHFR sits in the folate and methylation pathway, researchers have looked hard for links to psychiatric conditions. The findings are consistent in one way: the effect is modest.

• Depression. A 2013 meta-analysis of 26 studies, with 4,992 people with depression and 17,082 controls, found that two copies of C677T were associated with higher odds of depression (odds ratio 1.42). The link was stronger in Asian populations, marginal in white populations, and absent in older adults.
• Schizophrenia, bipolar disorder, and depression combined. A 2011 meta-analysis of case-control studies with 29,502 participants found TT carriers had modestly higher odds of these conditions as a group (odds ratio 1.26). The authors read this as evidence of a shared genetic vulnerability across the three conditions.

An odds ratio of 1.26 to 1.42 is a small increase in relative risk for a very common genotype. Most people with two copies of C677T never develop depression, bipolar disorder, or schizophrenia, and most people with those conditions don't have two copies. Mental health conditions come from many genes and life experiences acting together. MTHFR is, at most, one small piece.

Folate, folic acid, and methylfolate

A common online claim is that people with MTHFR variants can't use folic acid and need "methylated" supplements instead. The CDC says that isn't true: people with an MTHFR variant can process all types of folate, including folic acid. People with the TT genotype have blood folate levels only about 16% lower on average than people with CC at the same intake, and folic acid intake matters more than genotype in determining blood folate.

L-methylfolate, the active form, has been studied as an add-on to antidepressants. In two randomized trials published in the American Journal of Psychiatry in 2012, adults with depression that hadn't responded fully to an SSRI received L-methylfolate or placebo alongside their medication. The first trial, with 148 patients starting at 7.5 mg a day, found no difference. The second, with 75 patients at 15 mg a day, found a significant benefit over placebo. Both enrolled people based on their depression, not on a genetic test. Whether any add-on makes sense for a specific person is a clinical decision that depends on their full history.

For more on how folate and other nutrients relate to mood, see our article on nutrient deficiencies and anxiety.

Should you get tested for MTHFR?

For most people, no. MedlinePlus states that medical experts don't recommend testing for common MTHFR gene changes in most cases. A provider may order it in specific situations, such as high homocysteine on a blood test combined with a family history.

The American College of Medical Genetics and Genomics went further in a 2013 practice guideline: MTHFR polymorphism testing has minimal clinical utility and shouldn't be part of a routine evaluation for blood clotting disorders. Recent meta-analyses had disproven the links that originally motivated the testing.

If you already have a result, it's still useful context to share with your care team. It just isn't a diagnosis, and it isn't a treatment plan.

When depression or mood symptoms don't improve

People often look up MTHFR because something isn't working: depression that keeps coming back, medication that only half helps, or mood swings no one has explained. Those problems are real, even if MTHFR is unlikely to be the answer. They usually call for a fuller psychiatric evaluation: a closer look at the diagnosis, past medication trials, co-occurring conditions, sleep, substance use, and physical health.

That's the kind of care we provide at Amae Health. Our clinics specialize in conditions including Major Depressive Disorder, bipolar disorder, and schizophrenia. Our care teams bring psychiatrists, therapists, primary care physicians, and dietitians under one roof, so lab results, nutrition, and medication history are reviewed together, by people who share one treatment plan. See how our integrated outpatient clinics work.

Frequently asked questions

How common is the MTHFR gene mutation?

Very common. According to the CDC, more people in the U.S. have one or two copies of the C677T variant than don't. Two copies are less common, estimated at about 25% of Hispanic people and 10% to 15% of North American white people.

What are the symptoms of being MTHFR C677T heterozygous?

Usually none. According to MedlinePlus, raised homocysteine is seen mainly in people with two copies of C677T. If you have symptoms, they need an evaluation of their own rather than being attributed to one copy of a common variant.

Does MTHFR cause depression?

No single gene causes depression. Two copies of C677T are associated with modestly higher odds of depression in meta-analyses, with an odds ratio around 1.4, but most people who carry them never develop depression.

Do people with MTHFR need methylfolate instead of folic acid?

According to the CDC, no. People with MTHFR variants can process folic acid, and folic acid intake matters more than genotype for blood folate levels. L-methylfolate has been studied as an add-on treatment for depression, regardless of MTHFR status, and decisions about it belong with a clinician.

Is MTHFR testing worth it?

For most people, it isn't recommended. Medical genetics experts say the common variants have minimal clinical utility. A provider may order testing in specific cases, such as unexplained high homocysteine with a family history.

Key takeaways

• An MTHFR gene mutation usually means one or two copies of the common C677T or A1298C variants, which most people carry without health effects.
• Two copies of C677T can raise homocysteine and are linked to modestly higher odds of depression, bipolar disorder, and schizophrenia, but the effect is small.
• People with MTHFR variants can process folic acid, and routine MTHFR testing isn't recommended.
• If depression or mood symptoms aren't improving, a full psychiatric evaluation is more useful than a gene result.

If you or someone you love is living with depression, bipolar disorder, or schizophrenia that hasn't responded to treatment, request an intake appointment. Our team will walk you through how an evaluation works and what to bring, including any lab or genetic results you already have.