Biotin (High Dose)
A B-vitamin crucial for healthy hair, skin, and nails, often supplemented at high doses.
Also known as: Vitamin B7 • Vitamin H
Overview
Biotin, or Vitamin B7, is a water-soluble vitamin that plays a key role in the metabolism of fats, carbohydrates, and proteins. It is essential for maintaining the health of our hair, skin, and nails. While biotin deficiency is rare, high-dose supplementation has become popular for its purported benefits in strengthening brittle nails and improving hair health. It supports the production of keratin, a primary protein that makes up hair, skin, and nails.
Key Benefits
Strengthens Nails
High-dose biotin has been shown to increase the thickness of nail plates and reduce splitting in people with brittle nails.
Supports Hair Health
It may help improve hair volume and thickness, particularly in individuals with a deficiency.
Promotes Healthy Skin
Biotin is involved in fat metabolism, which is essential for maintaining healthy skin.
Dosage & How to Take
For beauty purposes, doses of 5,000 to 10,000 mcg (5-10 mg) per day are common.
| Purpose | Dose | Notes |
|---|---|---|
| Brittle Nails | 2,500-5,000 mcg/day | |
| Hair & Skin Health | 5,000-10,000 mcg/day |
Best Time to Take
Can be taken at any time of day.
With or Without Food
Not required.
Forms & Bioavailability
| Form | Absorption | Best For | Notes |
|---|---|---|---|
| D-biotin | High | Supplementation | This is the naturally occurring, biologically active form of biotin. |
Side Effects & Safety
Common
- Generally none. It is a water-soluble vitamin, and excess is excreted in urine.
Rare
- Can interfere with certain lab tests, particularly thyroid and cardiac troponin tests. Inform your doctor if you are taking high-dose biotin.
Contraindications
- None known, but consult a doctor before taking high doses, especially regarding lab test interference.
Interactions
Scientific Research
Treatment of brittle fingernails with biotin
A study showed that 2.5 mg of biotin per day for several months improved nail thickness by 25% in patients with brittle nails.
Food Sources
Frequently Asked Questions
Medical Disclaimer
This content is for educational and informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any supplement regimen, especially if you have pre-existing health conditions or are taking medications. The statements on this page have not been evaluated by the Food and Drug Administration.