Biotin For Hair Growth: Does It Work? Experts Weigh In*

Table Of Content

• Why biotin isn't a miracle hair-growth supplement — and the side effects you should know before taking it
• What Are Biotin’s Potential Side Effects?
• Who may be at risk for a deficiency
• Biotin can help repair brittle nails
• Creatine Side Effects and Risks: What to Know Before You Try the Supplement
• Biotin and Hair Growth—What Does the Science Say?

Richard notes that biotin can affect test results for vitamin D, estradiol, and folate levels. The biotin supplement can lead to either falsely high or low results, potentially influencing your final diagnosis or the treatment recommendations your healthcare team prescribes to you. If you’re taking a biotin supplement, tell your provider before you get any type of blood test. Biotin is a B vitamin that recently caught a lot of buzz as a nutrient that can thicken hair or improve the health of your nails. This is why you've probably seen it showing up in “beauty” supplements.

Why biotin isn't a miracle hair-growth supplement — and the side effects you should know before taking it

This article looks at why people need biotin, the recommended intake, sources, and any possible health risks. Here is what you need to know about biotin, its relationship to healthy hair, and possible side effects. Biotin is unlikely to cause adverse side effects, even in high doses. However, keep in mind that dietary supplements are not regulated the way drugs are in the United States.

What Are Biotin’s Potential Side Effects?

The body can absorb 100% of biotin taken by mouth, even at high doses, unless absorption issues are present, like inflammatory bowel disease (IBD). Additionally, the risk of biotin deficiency is higher in people who have been on parenteral nutrition (nutrition given intravenously) that lacks biotin. The metabolic requirements of pregnancy may also lead to biotin deficiencies in some cases.

Who may be at risk for a deficiency

Hair oiling is one of the most effective ways to prevent hair loss, add volume and shine to your strands. A study published in the International Journal of Trichology suggests that one must apply hair oils from roots to tips at least once a week before shampooing. Working more biotin into your system (whether through supplements or diet) is generally safe.

Biotin can help repair brittle nails

Although no major toxicities of excess biotin have been reported, data on the actual benefit of biotin's effect on hair and nail growth is limited. Moreover, outside the setting of pregnancy, malnutrition, medication effects, and biotinidase deficiency in children, reports of low biotin levels have rarely been cited. Biotin is a required cofactor for carboxylase enzymes that become activated once they are joined together by holocarboxylase synthase [18]. These enzyme complexes play an important role in multiple metabolic processes including gluconeogenesis, fatty acid synthesis, and amino acid catabolism [19].

Biotin deficiency could occur during pregnancy

However, there have been some reports of high doses of biotin causing strange results on thyroid tests. Anyone who has a thyroid condition may benefit from checking with a doctor before trying a biotin supplement. Also, eating raw eggs on a regular basis can cause biotin deficiency, because raw egg whites contain a protein called avidin that binds to biotin, preventing the body from absorbing it. The Food and Drug Administration (FDA) does not have a daily recommended dietary allowance for biotin.

Creatine Side Effects and Risks: What to Know Before You Try the Supplement

One serving (half a cup) of banana has 0.2 micrograms of biotin. Bananas also have vitamin B6, vitamin C, and the minerals manganese, potassium, and magnesium. 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. Plus, B vitamins are important for your brain and nervous system, which could help with neurological symptoms of diabetes, such as neuropathy (nerve damage). But biotin has been shown to help with preventing balding and hair loss.

Biotin and Hair Growth—What Does the Science Say?

Therefore, before diving into the result by urgently asking ‘how long does it take for biotin to work’, please take your time and know the threat is real. Once you are feeling nervous, you are aware of the importance of taking pills. Biotin was able to lower their blood sugar levels substantially, leading the researchers to recommend it as a secondary treatment for type two diabetes. So, from this, it follows that people with thin or brittle hair might respond in the same way to a biotin supplement. Biotin is thought to help nerves recover from damage, especially in people with progressive diseases, such as multiple sclerosis.

This will ensure the supplement won't interact with medications or other aspects of your health routine. Also, in some cases, high doses of biotin may affect hormone levels, including those related to healthy thyroid function15. Let your doctor know if you've been taking biotin, especially if you need routine hormone tests. Biotin (vitamin B7) is a micronutrient vital to energy production, nervous system health, and other bodily functions. Found in a plethora of foods and available as a supplement, biotin is most well-known for strengthening hair and nails and combatting alopecia.

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Some biotin supplements contain 2,500 mcg or more, which is significantly higher than the suggested dose for most adults. However, while a person may get an upset stomach, there is no evidence to suggest these high doses are dangerous. According to the National Institutes of Health, the average person in a western population consumes 35–70 mcg of biotin daily from foods they eat. For most people, a supplement will not be necessary as long as they are eating a healthy, varied diet. Folic acid supplementation is recommended both the year before and during pregnancy. It is a good idea to obtain a multivitamin that provides at least 30 micrograms (mcg) of biotin per day, in addition to folic acid, to decrease the risk of a deficiency.

If you want to try biotin supplements, start with smaller doses and work your way up if you’re noticing positive changes. Vitamin B7 can also be found as part of B-complex supplements, which include a full spectrum of B vitamins, including vitamin B6, vitamin B12, vitamin B2 riboflavin and vitamin B3 niacin. Together, the B vitamin complex supports metabolism activity, brain functions, nerve signaling and many other important daily functions. There isn’t a proven link between biotin and acne breakouts, but this micronutrient can reduce your body’s absorption of other nutrients (including ones that naturally help your body combat acne). In essence, it’s not so much that biotin causes acne, it’s that it prevents your body from assimilating other nutrients that normally help counteract the effects of acne, like zinc and antioxidants.

This protective covering is called myelin, and biotin may play an important role in producing it. Biotin is very important for women who are pregnant or lactating. In 2019, the Food and Drug Administration (FDA) warned that biotin can cause a blood test to show that a person has a low count of troponin, which is a marker necessary for the diagnosis of heart problems. The condition appears to respond to treatment with thiamin and biotin. A 2021 study showed biotin may be able to help with neuropathic pain.

It is high time for you to enjoy complimentary comments from your network. What we really urge you to do is to focus on your eating habits. Eat healthily, eat on a balanced diet and you will get plenty of biotins.

With strict editorial sourcing guidelines, we only link to academic research institutions, reputable media sites and, when research is available, medically peer-reviewed studies. Note that the numbers in parentheses (1, 2, etc.) are clickable links to these studies. This Dr. Axe content is medically reviewed or fact checked to ensure factually accurate information.

Box braids are hairstyle s which can protect from damage and help hair grow gradually. In this phase, it would be glad for most people to see some minor but recognizable changes. However, as we reason before, results of biotin vary from person to person. Your hair may appear slight changes that will bring you to cloud nine or it is just a dream that you are longing for. Even researchers have not come to a conclusion whether high accumulation of biotin over an extended time period is likely to pose any health threats.