Vitamin B7 (BIOTIN) Overview Information
Biotin is a vitamin that is found in small amounts in numerous foods.
Biotin is used for preventing and treating biotin deficiency associated with pregnancy, long-term tube feeding, malnutrition, and rapid weight loss. It is also used orally for hair loss, brittle nails, skinrash in infants (seborrheic dermatitis), diabetes, and mild depression.
How does it work?
Biotin is an important component of enzymes in the body that break down certain substances like fats, carbohydrates, and others.
There isn’t a good laboratory test for detecting biotin deficiency, so this condition is usually identified by its symptoms, which include thinning of the hair (frequently with loss of hair color) and red scaly rash around the eyes, nose, and mouth. Nervous system symptoms include depression, exhaustion, hallucinations, and tingling of the arms and legs. There is some evidence that diabetes could result in biotin deficiency.
Likely Effective for:
- Treating and preventing biotin deficiency. Symptoms of deficiency include thinning of the hair (often with loss of hair color), and red scaly rash around the eyes, nose, and mouth. Other symptoms include depression, listlessness, hallucinations, and tingling in the arms and legs. There is some evidence that cigarette smoking may cause mild biotin deficiency.
Possibly Ineffective for:
- Skin rash in infants (seborrheic dermatitis).
- Hair loss. There is some preliminary evidence that hair loss can be reduced when biotin is taken by mouth in combination with zinc while a cream containing the chemical compound clobetasol propionate (Olux, Temovate) is applied to the skin.
- Diabetes. Biotin alone doesn’t seem to affect blood sugar levels in people with type 2 diabetes. However, there is some evidence that a combination of biotin and chromium (Diachrome, Nutrition 21) might lower blood sugar in people with diabetes, whose diabetes is poorly controlled by prescription medicines. Other early evidence shows that the same combination reduces ratios of total cholesterol levels to “good” high-density lipoprotein (HDL) cholesterol, “bad” low-density lipoprotein (LDL) cholesterol to HDL cholesterol, and non-HDL to HDL cholesterol in people with type 2 diabetes.
- Diabetic nerve pain. There is some evidence that biotin can reduce nerve pain in people with diabetes.
- Brittle fingernails and toenails. Biotin might increase the thickness of fingernails and toenails in people with brittle nails.
- Other conditions.
Vitamin B7 (BIOTIN) Side Effects & Safety
Biotin is LIKELY SAFE for most people when taken appropriately and by mouth. Biotin is well tolerated when used at recommended dosages. It is POSSIBLY SAFE when injected into the muscles and used appropriately.
Special Precautions & Warnings:Pregnancy and breast-feeding: Biotin is POSSIBLY SAFE when used in recommended amounts during pregnancy and breast-feeding.
Kidney dialysis: People receiving kidney dialysis may need extra biotin. Check with your health care provider.
Vitamin B7 (BIOTIN) Dosing
The appropriate dose of biotin depends on several factors such as the user’s age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for biotin. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.
There is no recommended dietary allowance (RDA) established for biotin. The adequate intakes (AI) for biotin are 7 mcg for infants 0-12 months, 8 mcg for children 1-3 years, 12 mcg for children 4-8 years, 20 mcg for children 9-13 years, 25 mcg for adolescents 14-18 years, 30 mcg for adults over 18 years and pregnant women, and 35 mcg for breast-feeding women.