Rankings / Essentials — Vitamins & Minerals
Vitamin B7 (biotin)
Essentials · Vitamin
Tier B
Bottom line
Read Off Label grades Vitamin B7 (biotin) as B (6.7/10) based on strong evidence, low benefit magnitude, and a low-med-risk safety profile.
The lab interference is the actual clinical risk — high-dose biotin can mask MI on troponin assays and produce factitious thyrotoxicosis-like TSH/T4 patterns.
Studied, labeled, or reported-use context: 30 mcg/day RDA; 2. — OTC; not individualized guidance.
What the evidence says
The lab interference is the actual clinical risk — high-dose biotin can mask MI on troponin assays and produce factitious thyrotoxicosis-like TSH/T4 patterns. Biotin exposure is a recognized cause of discordant thyroid and troponin immunoassay results. Hair/nail benefit data is essentially absent in non-deficient subjects.
Mechanism
Cofactor for carboxylase enzymes (acetyl-CoA carboxylase, pyruvate carboxylase, propionyl-CoA carboxylase, beta-methylcrotonyl-CoA carboxylase) — central to fatty acid synthesis, gluconeogenesis, and BCAA catabolism
Studied, labeled, or reported dose & route
30 mcg/day RDA; 2.5-10 mg/day typical supplement; high doses common in 'hair, skin, nails' products
This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.
Citations
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Common questions
- What does the evidence show about Vitamin B7 (biotin)'s effects?
- Read Off Label rates the evidence for Vitamin B7 (biotin) as Strong and the benefit magnitude as low, producing an overall grade of B (6.7/10). The lab interference is the actual clinical risk — high-dose biotin can mask MI on troponin assays and produce factitious thyrotoxicosis-like TSH/T4 patterns.
- What safety findings are reported for Vitamin B7 (biotin)?
- Vitamin B7 (biotin) has a low-med risk profile in the database. Low-Med (interferes with biotin-streptavidin lab immunoassays — falsely low TSH, falsely high T4, falsely low troponin; FDA warning 2017; FDA communications describe assay-interference risk and laboratory-specific pause intervals) Legal status: OTC.
- What doses or routes are reported for Vitamin B7 (biotin)?
- 30 mcg/day RDA; 2.5-10 mg/day typical supplement; high doses common in 'hair, skin, nails' products This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
- How does Vitamin B7 (biotin) work?
- Cofactor for carboxylase enzymes (acetyl-CoA carboxylase, pyruvate carboxylase, propionyl-CoA carboxylase, beta-methylcrotonyl-CoA carboxylase) — central to fatty acid synthesis, gluconeogenesis, and BCAA catabolism
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.