Our B Complex is a high-strength formula using the active form of every single B-vitamin — not the cheap synthetic versions that dominate the supplement aisle. If you're taking a B Complex to support energy, mood or nervous system health, the form each vitamin comes in matters just as much as the dose.
Key Benefits
- All eight B-vitamins — contribute to normal energy-yielding metabolism, normal functioning of the nervous system, normal psychological function, and reduction of tiredness and fatigue.
- Vitamin B12 as methylcobalamin — the active form the body can use directly, rather than cyanocobalamin, which first has to be converted.
- Vitamin B6 as P5P (Pyridoxal-5-Phosphate) — the metabolically active form, at 10mg (714% NRV).
- Folate as 5-MTHF — bypasses the MTHFR conversion step that a meaningful proportion of the population is genetically less efficient at.
- Choline and Inositol added alongside — choline contributes to normal liver function and normal homocysteine metabolism, while inositol is included as a complementary nutrient often paired with B-vitamins for mood and metabolic support.
Why Dr Marks?
Almost every budget B Complex on the shelf uses thiamine HCl, cyanocobalamin and pyridoxine HCl — the cheapest, most stable forms to manufacture, but not the forms your body uses directly. We use the active form of B6, B9 and B12 throughout, at doses that are genuinely high enough to matter (up to 40x NRV for B12, which is safe because B-vitamins are water-soluble and any excess is simply excreted) rather than symbolic amounts. It's a formula built the way a GP would prescribe it, not the way a marketing team would price it.
Take one capsule daily, ideally with food and a glass of water. B-vitamins are water-soluble with no established Tolerable Upper Intake Level for most forms used here; however, please check with your GP first if you take regular prescribed medication that can affect B-vitamin levels, or are on dialysis. Suitable for vegetarians and vegans. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.
