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2Corrective

Vitamin B7 (Biotin)

Also sold as Biotin

Deficiency is rare. Its real problem is that it corrupts blood test results.

2TrustedSupp Tier System™ · Tier 2Take until levels correct

How long to take it

Short courses. Evidence for hair and nail benefit in people who aren't deficient is weak.

Who it's actually for

Documented deficiency, and some pregnancy-related needs.

Safe upper limit

Unverified
None established
Not toxic, but high-dose biotin distorts thyroid and cardiac troponin lab assays — it has caused missed heart attacks.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.

Interactions to know about

  • Upcoming blood tests — Some supplements distort lab results

Run your full list through the interaction check.

Practical notes

  • Stop biotin at least two days before any blood test and tell the lab you take it.