Written by WebMD Editorial Contributor
5 min read
What Is Biotin?
Biotin is a B-complex vitamin that helps your body break down food into energy. You can get it from eating meats, eggs, fish, seeds, nuts, and some vegetables, or by taking a daily supplement.
The name “biotin” comes from the Greek word “biotos,” which means “sustenance” or “life-giving.”
Biotin Benefits
Biotin, also known as vitamin B7, supports many parts of your body, including your nervous system, liver, eyes, hair, and skin. It helps the enzymes in your body carry out their jobs and keeps cells working as they should.
Some of its possible health benefits include:
Diabetes management
Studies show that biotin supplements may help manage symptoms of diabetes. It might help reduce blood sugar levels, total cholesterol, and blood fats in some people with diabetes. But it doesn't have much effect on insulin levels.
Plus, B vitamins are important for your brain and nervous system, which could help with neurological symptoms of diabetes, such as neuropathy (nerve damage). We need more research on this, though.
Biotin for hair
Some people have turned to biotin for longer, healthier hair. Research suggests that biotin supplements may benefit people with biotin deficiency or certain medical conditions affecting hair growth, such as alopecia. But there's a lack of evidence to show biotin works to grow hair in people without these conditions.
Nail health
As with hair, there's not enough scientific proof that biotin will give you longer, stronger nails unless you have a health condition that affects them.
Biotin for skin
Researchers have looked at the role of biotin in various skin conditions. They've linked a shortage of the vitamin to dermatitis, acne scarring, and other skin problems, but they need to do more research into how biotin levels affect your skin.
Prenatal care
Biotin is necessary for a healthy pregnancy. Studies show that about a third of pregnant women in the U.S. have mild biotin deficiencies, but we need more research to understand why.
During pregnancy, make sure to eat foods rich in biotin or talk to your doctor about taking a biotin supplement.
Nerve health
Biotin is thought to help nerves recover from damage, especially in people with progressive diseases, such as multiple sclerosis. But recent studies don't show any long-term benefits of taking high doses of biotin for nerve health.
How to Take Biotin
Biotin tablets
You can take biotin as a multivitamin, B-vitamin complex, or individual supplement. They usually come in 10-microgram, 50-microgram, and 100-microgram tablets.
Biotin dosage
The amount of biotin you need daily depends on your age and gender. The FDA says adults need 30 micrograms daily. If you're nursing, you need 35 micrograms every day.
If you think you're not getting enough biotin in your diet, talk to your doctor about taking a daily supplement.
Foods With Biotin
Biotin is a water-soluble vitamin, which means your body can't store it they way it stores fat-soluble vitamins. Instead, you have to replace it daily. Bacteria in yourgut can create biotin, though researchers aren't sure what role this plays in your overall biotin levels.
Foods high in biotin include:
Beefliver. Just 3 ounces of cooked liver has 30.8 micrograms, which is 100% of your daily value.
Eggs, especially egg yolks. One cooked egg has 10 micrograms of biotin.
Milk. One cup of 2% milk has 0.3 micrograms of biotin. Milk also contributes tobone andteeth health, and it is a good source ofprotein,calcium,phosphorous,potassium, andvitamin D.
Bananas. One serving (half a cup) of banana has 0.2 micrograms of biotin. Bananas also have vitamin B6,vitamin C, and the mineralsmanganese, potassium, andmagnesium.
Nuts and seeds have biotin, but how much you get depends. For instance, a quarter-cup of roasted almonds has 1.5 micrograms, but just six walnut halves have 9.5 micrograms. A quarter-cup of roasted sunflower seeds has 2.6 micrograms of biotin, more than the amount present in any other seed.
Pork chops. A 3-ounce serving of pork chops has 3.8 micrograms of biotin.
Salmon. A 3-ounce serving of cooked salmon has 5 micrograms of biotin, about 17% of your daily value.
Sweet potatoes have 2.4 micrograms of biotin in half a cup, about 8% of your daily value of biotin.
Mushrooms have biotin, too. A 100-gram serving of portabella mushrooms (a little more than 1 cup) contains 11.1 micrograms.
Biotin Deficiency
It's very rare to have a biotin deficiency, especially when you're healthy and eat a well-balanced diet. But there are symptoms if you're low on biotin, and they usually show up slowly.
Biotin deficiency symptoms
Biotin deficiency symptoms can include:
- Hair loss (alopecia)
- A red rash around your eyes, nose, mouth, and genital area
- Brittle nails
- Depression
- Lethargy (lack of energy)
- Hallucinations
- Numbness of your extremities (hands or feet)
- Seizures
Biotin Side Effects
Research suggests that taking biotin supplements, even in high doses, has very little risk.
Because biotin is water-soluble, your body flushes out any amount it doesn't need through your urine. But if you take too much, it could interact with other medicines you take or produce incorrect results on lab tests. Always tell your doctor about any dietary supplements you take.
Takeaways
Biotin, a B-complex vitamin found in foods like meats, eggs, fish, nuts, and some vegetables or in supplement form, helps to convert food into energy. It also supports various parts of your body, like the nervous system, liver, eyes, hair, and skin. While it may help manage diabetes symptoms and aid in prenatal care and nerve health, evidence of it improving hair, skin, or nails in those without deficiencies is limited. Foods rich in biotin include beef liver, eggs, milk, bananas, nuts, seeds, pork chops, salmon, sweet potatoes, and mushrooms.
