At Dr. Irena Sandler's clinic, we perform treatments based on biotin—an essential vitamin also known as Vitamin H or B7. Biotin plays a role in the metabolism of proteins, fats, and carbohydrates, and directly contributes to hair health,
The skin and nails.

Main effects of biotin
• Strengthening hair follicles and stopping hair loss.
• Improvement of hair thickness, elasticity, and shine.
• Restoring dry or sensitive skin and improving the skin's appearance.
• Strengthening weak and brittle nails.
• Support for cellular energy and metabolic balance as part of longevity processes.

Who is this recommended for?
• For women and men suffering from excessive hair loss or thinning hair.
• After childbirth, severe diets, or prolonged periods of stress.
• For those suffering from brittle or weak nails.
• As support for longevity treatments and skin rejuvenation.
• For those interested in generally improving vitality, skin, and hair as part of a holistic health and aesthetics process.

How is the treatment performed?
The treatment is administered as an injection or intravenous infusion of biotin at a concentration of 10 mg/mL, typically 2 mL per treatment.
The protocol typically involves a series of 4 to 6 treatments, at a frequency of once every one to two weeks.
The treatment is performed under medical supervision, with the dosage personalized based on the body's response and the condition of the hair and skin.

Research data
• According to a study published in the *Journal of Clinical & Aesthetic Dermatology* (2012), biotin treatment was found to be effective for hair loss and thinning hair in women.
• Another study (Cutis, 1993) showed that biotin improves nail strength and reduces breakage in 91% of the subjects.
• A scientific review (Skin Appendage Disorders, 2017) confirmed that biotin contributes to improving the structure of hair and skin, particularly in cases of nutritional deficiency.

Scientific sources and articles
1. Bolanča, Z. et al. (2017). The Role of Biotin in Hair and Nail Health. *Skin Appendage Disorders.*
Link: https://www.karger.com/Article/FullText/475344
2. Hochman, LG (1993). Brittle nails: Response to daily biotin supplementation. *Cutis.*
Link: https://pubmed.ncbi.nlm.nih.gov/8326152/
3. Patel, DP et al. (2012). A Review of the Use of Biotin for Hair Loss. *J Clin Aesthet Dermatol.*
Link: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5582478/

Summary
Biotin is one of the most important components for maintaining the healthy appearance of hair, skin, and nails.
It is an integral part of Dr. Irena Sandler’s longevity approach, which combines medicine, aesthetics, and general health. Biotin treatment restores vitality and promotes strengthening and renewal from within.