A closer look at biotin’s role in normal energy metabolism, healthy hair and skin, and everyday nutritional support.
Biotin is best known as a hair, skin, and nail supplement ingredient, but its role starts with something more fundamental: helping your body use nutrients. This essential B vitamin contributes to normal metabolism and the maintenance of normal hair and skin.*2
In WrenLife GLP-1 Support Multi+, biotin is part of a broader approach to daily nutrition—19 vitamins and minerals in a convenient two-tablet serving.*5
What Is Biotin?
Biotin, also called vitamin B7, is a water-soluble vitamin found in foods and supplements. It acts as a cofactor: a helper that certain enzymes need to do their jobs.
Five biotin-dependent enzymes carry out important steps in the metabolism of glucose, fatty acids, and amino acids—the building blocks of protein. These processes help your body manage the nutrients it receives from food.1
Helping Your Body Use Food for Energy
Food supplies fuel, and your cells use a series of chemical reactions to put that fuel to work. Biotin supports normal energy metabolism by helping enzymes involved in processing carbohydrates, fats, and protein.*2
On a supplement label, “supports energy metabolism” describes these everyday cellular processes.
Nutritional Support for Hair and Skin
Maintaining Normal Hair
Adequate biotin contributes to the maintenance of normal hair.*2 Its importance is especially clear in biotin deficiency, which can cause thinning hair. Restoring adequate biotin in someone who is deficient helps address that nutritional cause.1
For everyday hair care, the useful focus is consistent nutrition: meeting your needs for biotin as part of an overall balanced diet.
Supporting Normal Skin
Biotin also contributes to the maintenance of normal skin.* It supports enzymes involved in fatty-acid metabolism, one of its essential cellular roles. Skin changes can occur when biotin is deficient, reinforcing why adequate intake matters.2
These hair and skin benefits describe the value of nutritional adequacy. The clearest benefit from additional biotin is correcting a deficiency.1
Where Nail Support Fits
Biotin has also been studied in people with brittle nails. Small studies have reported improvements in nail thickness or firmness, although the evidence remains limited. For persistent nail brittleness, a healthcare professional can help determine whether nutritional support is appropriate.3
Why Include Biotin in GLP-1 Nutritional Support?
When GLP-1 treatment reduces appetite, smaller meals can make it more challenging to fit in a varied range of foods. A joint advisory from four professional organizations emphasizes nutrient-dense meals, adequate protein, and individualized consideration of supplements during treatment.4
That is where a daily multivitamin can fit: as a practical way to supplement food intake when your routine or food choices change. Biotin contributes its established nutritional functions within that broader plan.*
Getting Biotin Through Food and Supplements
Cooked eggs, salmon, nuts, seeds, and sweet potatoes can contribute biotin to your diet. For most adults, the Adequate Intake is 30 mcg per day from all sources. Supplement amounts vary, so consider the complete formula and your individual needs when choosing a product.1
Biotin in WrenLife GLP-1 Support Multi+
Each two-tablet serving of Multi+ provides 3,000 mcg (3 mg) of biotin alongside other vitamins and minerals. The iron-free formula is designed to complement your meals and make daily nutritional support easier to maintain.*5
Take two tablets daily with a meal, or as directed by your healthcare professional. Keep nutrient-dense foods, protein, and fluids at the center of your routine, with Multi+ as a convenient addition.4,5
Explore GLP-1 Support Multi+References
- NIH Office of Dietary Supplements. Biotin: Fact Sheet for Health Professionals.
- EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific opinion on biotin and energy-yielding metabolism, macronutrient metabolism, maintenance of skin and hair, and nervous-system function. EFSA Journal. 2009;7(9):1209. doi:10.2903/j.efsa.2009.1209.
- Colombo VE, et al. Treatment of brittle fingernails and onychoschizia with biotin: scanning electron microscopy. J Am Acad Dermatol. 1990;23:1127–1132. PubMed. Small uncontrolled study in people with brittle nails.
- Mozaffarian D, et al. Nutritional priorities to support GLP-1 therapy for obesity: a joint advisory. Am J Clin Nutr. 2025;122:344–367. Full text. Professional guidance; several authors disclose industry relationships.
- WrenLife. GLP-1 Support Multi+ product information and Supplement Facts. Accessed October 15, 2026.
- U.S. Food and Drug Administration. Biotin Interference With Troponin Lab Tests.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
