6s-5-Methyltetrahydrofolate [Bio-Active Folate]: Brands, Price & Uses in Bangladesh

6s-5-Methyltetrahydrofolate [Bio-Active Folate] is the naturally occurring, biologically active form of folate (vitamin B9). Unlike synthetic folic acid, it does not require enzymatic reduction by dihydrofolate reductase or the MTHFR enzyme before it can be used by the body, so it can be absorbed and utilized directly.

Established / commonly used indications

• Prevention and treatment of folate deficiency, including deficiency related to poor dietary intake, malabsorption, pregnancy, or increased physiological demand.
• Nutritional supplementation before and during pregnancy to support normal fetal neural tube development and reduce the risk of neural tube defects, as part of routine prenatal care.
• Alternative to synthetic folic acid in individuals with reduced capacity to convert folic acid to its active form, such as those with common MTHFR gene variants (e.g., C677T), or with folate malabsorption.

Adjunct / specialist uses (require combination therapy or physician supervision)

• As adjunctive nutritional support alongside an existing antidepressant in adults with major depressive disorder who have suboptimal folate status — used in addition to, not instead of, prescribed antidepressant therapy.
• As adjunctive support in patients with hyperhomocysteinemia and schizophrenia already stabilized on antipsychotic therapy.
• Nutritional support of folate status in patients on long-term dialysis or on medications that interfere with folate metabolism (e.g., certain antiepileptics, methotrexate), under medical supervision.

Evidence for superiority of 6s-5-Methyltetrahydrofolate [Bio-Active Folate] over standard folic acid in the general population (outside genetic-variant or malabsorption contexts) is limited, and such use should be viewed as a nutritional/supportive measure rather than a proven outcome-altering therapy.

General dietary supplementation / folate deficiency

Adjunctive use in major depressive disorder (specialist/medical-food products)

Usual adult dose is 7.5 mg to 15 mg orally once daily, used together with an existing antidepressant and under psychiatric supervision.

Adjunctive use in schizophrenia with hyperhomocysteinemia

Dosing individualized by the treating physician alongside stabilized antipsychotic therapy.

There is no well-established need for renal or hepatic dose adjustment for standard dietary-supplement strengths, but patients with significant renal or hepatic impairment should use 6s-5-Methyltetrahydrofolate [Bio-Active Folate] only under physician guidance.

6s-5-Methyltetrahydrofolate [Bio-Active Folate] is generally very well tolerated. Reported adverse effects are uncommon and include:

• Gastrointestinal: nausea, decreased appetite, bloating, flatulence, diarrhea.
• Hypersensitivity reactions: skin rash, pruritus, urticaria; rare severe allergic/anaphylactic reactions have been reported.
• Occasional reports of sleep disturbance, irritability, or vivid dreams, mainly at higher medical-food strengths used adjunctively.