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2Corrective

Vitamin B complex

Also sold as B-complex, B50, B100, methylated B complex

All eight B vitamins in one product — useful for genuinely low intake, but high-potency versions can quietly exceed the B6 limit.

TrustedSupp Tier System™ · Tier 2Take until levels correct

Evidence strength

60/100Moderate
WEAKLIMITEDMODERATESTRONGVERY STRONG

What the evidence supports: correcting documented B-vitamin deficiencies; energy claims in replete people are unsupported.

This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.

How long to take it

Temporary, while correcting low intake; reassess after a few months.

Who it's actually for

People with restricted diets, heavy alcohol use, or documented low B-vitamin levels.

Safe upper limit

Unverified
Governed by its components — most importantly B6 (100 mg/day) and niacin (35 mg/day from supplements)
High-potency 'B50' and 'B100' products can deliver B6 at levels linked to nerve damage with prolonged use, especially when stacked with energy drinks or a separate B6. The biotin in most complexes also distorts some blood tests.
No source or citation attached yet.

Interactions to know about

Other supplements:

Run your full list through the interaction check.

Practical notes

  • Check the B6 amount on the label — some products far exceed what anyone needs.
  • Stop two days before blood tests and tell the lab — biotin affects thyroid and cardiac tests.
  • Bright yellow urine is from riboflavin and is harmless.