Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Thorne is one of a small number of supplement brands our doctors are comfortable recommending by name. Their manufacturing standards and ingredient transparency are consistently rigorous. We stock this biotin specifically for patients whose blood work or dietary history suggests B7 insufficiency — it is a focused, no-filler formula rather than a speculative addition to a wellness stack.
About this product
Biotin
Thorne Biotin is a single-ingredient supplement providing biotin, a B-vitamin (B7) that plays a central role in keratin production — the structural protein that makes up hair, skin, and nails. It also supports fatty acid synthesis and glucose metabolism, which means it earns its place beyond cosmetic concerns alone.
Biotin deficiency, though not common in those eating a varied diet, does occur — and when it does, the signs often show up first in brittle nails, thinning hair, and dry or flaky skin. This supplement is well suited to people with confirmed or suspected low biotin status, those following restrictive diets, pregnant women (whose requirements increase), or individuals taking medications that may interfere with B-vitamin absorption over time.
At 8,000 mcg per capsule, this is a high-potency dose. Biotin is water-soluble, so the body does not store excess, and toxicity is not a documented concern at supplemental levels — but at high doses it is worth noting that biotin can interfere with certain thyroid and troponin blood tests, producing false results. If you have bloodwork scheduled, flag biotin use to your clinician.
Thorne is a brand with a long-standing reputation for formulation rigour and clean manufacturing standards. Their supplements are regularly used in clinical and research settings, which is part of why they appear across our doctor-curated range.
What it does
Benefits
- 01
Supports keratin production for hair, skin, and nails
- 02
May help address brittle nails linked to low biotin status
- 03
Relevant for those with diet-related B-vitamin gaps
- 04
Supports fatty acid synthesis and glucose metabolism
- 05
High-potency, single-ingredient formula from a clinically trusted brand
Get the most from it
How to use
Take 1 capsule daily, as directed on the packaging. Biotin is water-soluble and can generally be taken with or without food. Consistency over several weeks is typically needed before changes to hair or nail quality become noticeable.
What's inside
Ingredients
View full ingredient list
Biotin 8000mcg
Common questions
Frequently asked
Who is most likely to benefit from a biotin supplement?
People with confirmed low biotin levels, those on restrictive diets, pregnant women, or anyone taking medications that may deplete B-vitamins over time are most likely to see a meaningful benefit. For those with adequate dietary intake, the evidence for cosmetic improvements is more limited.
Can high-dose biotin interfere with blood tests?
Yes — this is clinically important. High-dose biotin supplementation can interfere with certain immunoassay-based blood tests, including some thyroid function panels and cardiac troponin tests, potentially producing misleading results. Inform your GP or clinician that you are taking biotin before any bloodwork.
How long before I notice a difference in hair or nails?
Hair and nail growth cycles are slow. Most people would not expect to notice a change in texture or strength for at least 8–12 weeks of consistent daily use. If you see no improvement after three months, it is worth revisiting whether biotin deficiency is the underlying cause.
Is it safe to take alongside other B-vitamins or a multivitamin?
Generally yes, but check the biotin content of any multivitamin you are already taking to avoid unintentionally stacking very high doses. If in doubt, check the combined total with your prescribing clinician.
Is biotin suitable during pregnancy?
Biotin requirements do increase during pregnancy, and deficiency is more common in this group. That said, always discuss any new supplement with your midwife or obstetrician before starting, particularly at high-potency doses.
Doctor-guided care
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