Biotin, or vitamin B7, has established itself as a key element not only for overall well-being, but also for personal aesthetics, significantly impacting hair health.
This compound plays an important role in metabolism, helping convert fats, carbohydrates and proteins into the energy the body needs, as well as supporting the maintenance of a healthy nervous system. Its influence extends into the field of cosmetics, where its contribution to hair care is widely recognised and valued.
Its relevance in hair care routines lies in its intrinsic properties, which are essential for keeping hair in optimal condition. Below, we explore how this vital compound influences the health and appearance of hair, establishing itself as an essential ingredient in hair products and treatments:
- Nourishes hair follicles: it plays a key role in the production of keratin, a protein that forms part of the hair structure. By strengthening hair follicles, biotin helps hair grow stronger and healthier.
- Strengthens hair structure: biotin also contains sulphur, a mineral that is important for hair health. Sulphur helps strengthen the hair structure and prevent breakage.
- Provides elasticity and flexibility: it improves the hair structure, increasing its elasticity and flexibility. This means hair is less likely to break and feels softer and more manageable.
- Enhances shine and vitality: it promotes shiny, healthy-looking hair by improving hydration and nourishment of the hair follicles. This helps hair appear more radiant and full of life.
- Protects against environmental damage: it acts as a protective shield for the hair, helping it combat the harmful effects of sun, wind, pollution and chemicals.
- Improves texture and thickness: it enhances hair texture, making it softer and silkier to the touch. It may also help increase hair thickness, giving it a fuller appearance.

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Studies on biotin and hair growth
Laboratory studies have shown that the combination of biotin with the GHK tripeptide can increase hair length by between 58% and 120%.
Another study involving nine people with androgenetic alopecia and telogen effluvium found that oral intake of 2.5 mg of biotin per day improved hair growth and nail condition in seven cases.
- Experts believe that taking higher doses of biotin (around 5 mg) may produce even more noticeable improvements.
Possible causes of hair loss
Alopecia or hair loss can be a very frustrating problem for both men and women. While genetics plays an important role in the predisposition to hair loss, there are other triggering factors that may contribute to this issue:
- Lack of biotinidase: Biotinidase is an enzyme that helps the body absorb biotin. A deficiency in this enzyme can lead to hair loss.
- Pancreaticoduodenectomy: Removal of the pancreas or duodenum can affect nutrient absorption, including biotin, which may lead to hair loss.
- Hormonal imbalances: Hormonal changes, such as those occurring during puberty, pregnancy or menopause, may affect hair growth.
- Side effects of medication: Some medications, such as antidepressants or anticoagulants, may have hair loss as a side effect.
- Chronic disorders: Certain conditions, such as lupus or psoriasis, may affect hair growth.
- Nutritional deficiencies: A diet lacking in vitamins and minerals, such as biotin, may contribute to hair loss.
Interactions and contraindications of biotin
In general, biotin is safe and well tolerated. No side effects are known at normal doses. However, there are some interactions and contraindications to consider:
- Anticonvulsants: Biotin may interfere with blood levels of anticonvulsants.
- Oral antibiotics: Antibiotics may reduce the absorption of biotin.
- Isotretinoin: This acne medication may reduce biotin activity.
- Pantothenic acid: High doses of pantothenic acid may reduce biotin activity.
- Digestive disorders: Biotin is not recommended if digestive disorders affecting intestinal flora are present.
This is because no side effects of vitamin B7 are known unless doses exceeding up to 10 mg/day are taken, as safety at higher intakes has not been fully established.
Biotin food supplements for hair health
Biotin can be obtained through diet, by consuming foods rich in it such as eggs, salmon, nuts and seeds, or through food supplements that provide optimal amounts of the vitamin to maximise its benefits.
At HSN, you will always find the best biotin brands with daily discounts and offers for our customers. In addition, we offer the EssentialSeries line, with biotin products in vegetable capsules and gluten-free tablets, made with the highest quality and maximum bioavailability.
Related Studies:
- Hamid M Said Biotin: The forgotten vitamin 2002 American Society of Clinical Nutrition
- Zempleni J, Wijeratne SS, Hassan YI. Biotin 2009 Jan-Feb; 35 (1): 36-46. doi: 10.1002 / biof.8.
- Fernandez-Mejia C Pharmacological effects of biotin J Nutr Biochem. 2005 Jul; 16 (7): 424-7.
- RA Peters The vitamin B complex Br Med J. 1936 November 7; 2 (3957): 903-905.
- Higdon, Jane, Drake, Victoria J. and Mock, Donald. Micronutrient Information Center: Biotin. Oregon State University: Linus Pauling Institute. August 2008.
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