Doctor's Best Fully Active B12 delivers 1,500 mcg of methylcobalamin per capsule — the most bioavailable, biologically active form of Vitamin B12, identical to what your body actually uses, with no conversion required.
Why
Most B12 supplements use cyanocobalamin — the cheapest form, which must be converted by the body before it can be used. Methylcobalamin is one of the two forms your body uses directly, and it's the predominant form found in the brain and nervous system. Doctor's Best uses a therapeutic 1,500 mcg dose — well above the basic RDI — to help correct deficiencies and provide meaningful support for energy, nerve function, memory, mood, and cardiovascular health. B12 deficiency is one of the most common nutritional deficiencies worldwide, particularly among vegetarians and vegans, older adults, and those taking medications such as metformin or proton pump inhibitors. Founded in 1990 by a physician, Doctor's Best is a brand you can trust to formulate with the right form, at the right dose.
Key Benefits
- 1,500 mcg methylcobalamin per capsule — 25,000% DV
- Most biochemically active form — no conversion required
- Supports healthy nerve cell signalling and neurological function
- Supports memory, mood, and cognitive health
- Supports healthy homocysteine recycling — important for cardiovascular health
- Supports energy production and reduces fatigue
- Supports healthy red blood cell formation
- Highly recommended for vegetarians and vegans
- Vegetarian capsule — cellulose only
- 60 vege caps — 60-day supply at 1 capsule daily
Formula Highlights
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Methylcobalamin (Vitamin B12) — 1,500 mcg: The biologically active, brain-preferred form of B12. Supports nerve function, energy metabolism, DNA synthesis, red blood cell formation, mood, memory, and healthy homocysteine levels.
Supplement Facts
Serving size: 1 capsule | Servings per container: 60
| Ingredient |
Amount Per Serving |
% Daily Value |
| Vitamin B12 (as methylcobalamin) |
1,500 mcg |
25,000% |
Suggested Use
Take 1 capsule once daily with a meal. Higher intakes may be beneficial as recommended by a nutritionally-informed healthcare practitioner.
Other Ingredients
Cellulose, modified cellulose (vegetarian capsule). Contains nothing other than listed ingredients. Manufactured in a GMP-compliant facility.
About Doctor's Best
Founded in 1990 by a physician, Doctor's Best is committed to Science-Based Nutrition™ — formulating supplements with the most bioavailable, clinically researched ingredients at meaningful therapeutic doses. Every product is rigorously tested for purity and potency, so you know exactly what you're getting.
Warnings
Consult a healthcare professional before use if pregnant, nursing, taking medication, or managing a medical condition. Keep out of reach of children.
