Capsules · 90 capsules
Serving Size:
1 Capsule
Amount Per Serving:
Folate (as 500 µg of 5-Methyltetrahydrofolate from 925 µg [6S]-5-methyltetrahydrofolic acid, glucosamine salt)) ... 833 mcg DFE
Other Ingredients:
Hydroxpropyl methylcellulose, microcrystalline cellulose, L-leucine.
Warning: If you are pregnant or lactating, have any health condition or are taking any medication, consult your healthcare practitioner before use.
As a dietary supplement, 1 capsule one or two times daily, or as directed by a healthcare practitioner.
Store in a cool, dry place, tightly capped, away from light. Keep out of the reach of children. Use only if safety seal is intact. Variations in the product color may occur.
Source: Fullscript original manufacturer label · September 06, 2026. Formulas and labels can change. Check the packaging you receive.
QuatreActiv® Folate from Allergy Research Group delivers 4th generation (6S)-5-methyltetrahydrofolate, the biologically active form of folate, designed to support methylation, homocysteine metabolism, and neurological function. Unlike synthetic folic acid, 5-MTHF bypasses the conversion steps that many individuals with MTHFR variants cannot complete efficiently, making it particularly relevant for those seeking a readily usable folate source.
Why It's Worth Considering: The QuatreActiv® designation reflects an advanced-generation 5-MTHF with enhanced stability and stereochemical purity, formulated by a brand with longstanding recognition in the practitioner-grade supplement space.
As a dietary supplement, 1 capsule one or two times daily, or as directed by a healthcare practitioner.
| Feature | Methylated (active) | Standard | Synthetic (cheap) |
|---|---|---|---|
| B12 Form | Methylcobalamin | Hydroxocobalamin | Cyanocobalamin |
| Folate Form | 5-MTHF (methylfolate) | Folinic acid | Folic acid (synthetic) |
| B6 Form | P-5-P (pyridoxal-5-phosphate) | Pyridoxal | Pyridoxine HCl |
| Best For | MTHFR variants, optimal absorption | General use | Budget (requires conversion) |
| MTHFR Safe | Yes — bypasses mutation | Mostly yes | No — cannot be converted by 40% of population |
Methylated B vitamins are in their active, bioavailable form, your body can use them immediately without conversion. About 40% of the population has MTHFR gene variants that impair conversion of synthetic folic acid to active folate. Methylated forms (methylcobalamin, methylfolate, P-5-P) bypass this issue entirely.
This is completely normal and harmless. Riboflavin (B2) is a bright yellow fluorescent compound. When you take more than your body needs, the excess is excreted in urine, causing the distinctive color. It's actually a sign your body absorbed the B vitamins and is eliminating what it doesn't need.
B vitamins support energy production, so morning dosing is generally recommended. Some people find evening B-complex disrupts sleep due to increased energy. However, B6 and B12 are involved in melatonin production, so individual responses vary. If evening dosing doesn't affect your sleep, it's fine.
Signs of B12 deficiency: fatigue, brain fog, tingling/numbness in extremities, balance issues, mood changes, and pale skin. At-risk groups: vegetarians/vegans (B12 is only in animal foods), adults over 50 (reduced absorption), and those taking metformin or PPIs (which deplete B12). A serum B12 test plus methylmalonic acid (more sensitive) can confirm.
Yes, B vitamins are water-soluble, meaning excess is excreted daily. No accumulation risk at standard supplement doses. The exception is B6 (pyridoxine): chronic doses above 100mg/day can cause peripheral neuropathy (nerve damage). The P-5-P form is safer at higher doses than pyridoxine HCl.
Ask Gabriel for personalized stacking recommendations.
No significant interactions identified. Always consult your healthcare provider.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
