Biotin not only plays a crucial role in the health of hair but also positively influences its structure and shine. Insufficient biotin levels can lead to hair loss and compromise overall hair health. Supplementing with biotin not only helps prevent hair loss but also promotes robust growth, making the hair strong and vibrant. In this article, we will delve deeper into the comprehensive effects of biotin, from providing essential nutrients to the hair to how it influences elasticity and the luster of the hair. Keep reading!


Biotin, also known as vitamin B7, is an essential nutrient that plays a role in many important functions in the body. It’s a water-soluble vitamin, meaning it dissolves in water and is not stored in the body, so you need to get it from your diet or supplements on a regular basis.. Obtaining biotin from the foods you consume is recommended. Biotin plays key roles in converting food into energy, regulating cell signals, and managing gene activity. This essential nutrient is found in various everyday foods and is primarily stored in the liver.


Despite the limited evidence supporting the exclusive use of biotin for stimulating hair growth, there is somewhat stronger evidence regarding its role in preventing hair loss. Biotin supplementation may indeed be effective in averting hair loss and promoting hair growth, particularly in individuals with a biotin deficiency. Hair loss can be attributed to a variety of factors, including androgenetic alopecia (female pattern baldness), rapid weight loss, nutritional deficiencies (such as iron, zinc, or protein), and endocrine disorders like thyroid dysfunction.

The decision to supplement with biotin without identifying the underlying root cause may impede or delay the initiation of appropriate treatment, especially when a biotin deficiency is not the primary issue. Even in cases where biotin deficiency is present, the supplementation of biotin may not guarantee the prevention of hair loss. Understanding the multifaceted nature of hair loss and its prevention is crucial. While biotin plays a role, it is just one piece of the puzzle. Thorough examination and consideration of various contributing factors, including hormonal imbalances and nutritional deficiencies, are essential for devising a comprehensive and effective treatment plan. 

A Pilot Study of Oral Biotin for the Prevention of Hair Loss in Patients Receiving Taxane-Based Chemotherapy” (2016) by Palmieri et al. “Biotin for Scalp Hair Loss Induced by Chemotherapy in Patients with Breast Cancer: A Double-Blind, Randomized, Placebo-Controlled Trial” Biotin supplementation might decrease hair loss in some patients receiving chemotherapy, particularly those with pre-existing biotin deficiency.


Biotin can be obtained from various food sources, and here are some examples along with their biotin content in micrograms:

  • Egg yolk
  • Pork liver
  • Oat flakes
  • Wheat germ and whole grains
  • Nuts and legumes
  • White mushrooms
  • Rice
  • Spinach and cauliflower
  • Cheese, curds, and cow’s milk
  • Pork, beef, and chicken
  • Salmon
  • Apples, bananas, and tomatoes
  • Carrots, lettuce, and potatoes

These foods provide a range of biotin levels, contributing to meeting the daily recommended intake. Including a variety of these sources in your diet can help ensure an adequate supply of biotin for overall health.


Biotin supplements are readily accessible in a wide range of retail outlets, including drug stores, pharmacies, and supermarkets. Additionally, you have the option to make purchases both in physical stores and online. These supplements come in various oral forms, such as liquid, tablets, gummies, and capsules, providing flexibility in choosing the most convenient option for you. When taken orally, the body exhibits a high absorption rate for biotin, even at elevated doses, ensuring that the nutrient is efficiently assimilated. This makes biotin supplementation a convenient and effective way to meet your dietary needs.


The appropriate dosage of biotin for hair loss can vary depending on several factors, including:

Underlying cause of hair loss: If your hair loss is due to biotin deficiency, a smaller dose (around 30-100 micrograms per day) might be sufficient.

For other causes, higher doses (5-10 mg per day) have been studied, but more research is needed.

Prevention in individuals without deficiency: 30-100 micrograms per day.

Treatment for established biotin deficiency: 5-10 mg per day.

Chemotherapy-induced hair loss: 5-10 mg per day has been studied.

Uncombable hair syndrome: Higher doses (up to 100 mg per day) have been used in some cases.

Remember to consult your doctor first. They can assess your hair loss cause (hormonal changes, medical conditions, nutritional deficiencies) and determine if biotin could be helpful.

A study published in 2016 demonstrated that supplementing with 5 mg of biotin daily for 6 months significantly reduced hair loss in individuals experiencing hereditary hair loss. Another study, published in 2020, revealed that supplementing with 2.5 mg of biotin daily for 12 weeks significantly reduced hair loss in individuals undergoing chemotherapy-induced hair loss.


While biotin is generally considered safe for most people when taken in appropriate doses, there are some potential side effects to be aware of:

Skin Issues

Elevated doses of biotin may contribute to skin problems, including the onset or worsening of acne, and the occurrence of seborrheic dermatitis—characterized by red, scaly patches on the skin. This is particularly notable at higher biotin doses.

Digestive Issues

Some individuals may experience digestive disturbances, such as diarrhea, nausea, gas, or bloating, as a result of biotin supplementation.

Allergic Reactions

Although rare, allergic reactions to biotin supplements can manifest in individuals with sensitivity. Vigilance is crucial in detecting any signs of an allergic response.

Kidney Problems

 Reports suggest a potential link between high-dose biotin intake and kidney issues, especially in individuals with pre-existing kidney conditions. Monitoring kidney health becomes imperative, particularly when considering elevated biotin doses.


The time it takes for biotin to show noticeable effects can vary among individuals. Biotin is often promoted for its potential benefits in supporting healthy hair, skin, and nails. However, individual responses to biotin supplementation can be influenced by factors such as genetics, overall health, and the specific reason for taking biotin.

Some people may start to observe changes, such as improved nail strength or hair texture, within a few weeks of consistent biotin supplementation. However, for others, it might take several months before significant results become apparent.

It’s essential to be patient and consistent with biotin supplementation. Results may not be immediate, and the effectiveness of biotin can vary from person to person. If you have specific health concerns or are considering taking biotin for a particular reason, it’s advisable to consult with a healthcare professional. They can provide guidance on the appropriate dosage and duration based on your individual needs and health status.


Biotin deficiency can manifest in various symptoms, indicating the importance of recognizing these signs for timely intervention. Common symptoms of biotin deficiency include:

  • Hair Thinning and Loss: Biotin deficiency may contribute to hair thinning and noticeable hair loss.
  • Brittle Nails: The lack of biotin can lead to brittle and weak nails.
  • Red, Scaly Rash: A characteristic red and scaly rash, typically appearing around the eyes, nose, and mouth, may be indicative of biotin deficiency.
  • Facial Fat Distribution: Unusual facial fat distribution could be observed in individuals deficient in biotin.
  • Skin Infections: Biotin deficiency may make the skin more susceptible to infections.
  • Conjunctivitis: Inflammation of the conjunctiva, known as conjunctivitis, can be a symptom of biotin deficiency.
  • Neurological Issues: In adults, biotin deficiency may manifest as depression, extreme tiredness, and hallucinations.
  • Decreased Muscle Tone and Developmental Delay: Infants with biotin deficiency may exhibit decreased muscle tone, sluggishness, and developmental delays.
  • Seizures: Biotin deficiency can potentially contribute to the occurrence of seizures.


If you are considering supplementing with biotin for hair loss treatment, it is essential to consult with a doctor beforehand. They can help you determine whether biotin is suitable for you and recommend the appropriate dosage. We hope that our article provides you with the most useful information.


  1. Who should not take biotin?

Individuals who are allergic to biotin or any of its ingredients should not take biotin supplements. Additionally, it’s advisable for people with certain medical conditions, such as those with a history of kidney stones, to consult with a healthcare professional before taking biotin supplements

  1. Is it OK to take biotin everyday?

Yes, when taken by mouth: Biotin is likely safe for most people when taken in doses up to 300 mg daily for up to 6 months. But it is more commonly used in lower doses of 2.5 mg daily. When applied to the skin: Biotin is likely safe for most people when applied in cosmetic products that contain up to 0.6% biotin.

  1. Does biotin have health risks?

No, biotin is generally considered safe when taken in appropriate doses. However, excessive intake may lead to potential side effects, and it can interfere with certain lab tests. It’s important to follow recommended dosages and consult with a healthcare professional if you have concerns.

  1. What happens when you stop taking biotin?

When you stop taking biotin, your body will no longer receive the supplemental biotin dosage. As a water-soluble vitamin, any excess biotin is typically excreted in urine. Biotin deficiency is rare because it’s found in various foods, and the body produces some biotin through gut bacteria.