Short answer: Biotin, zinc and selenium each have authorised EU claims connected with normal hair or nail maintenance, and biotin and zinc also have claims for normal skin. Those claims describe normal nutrient functions; they do not establish that taking extra amounts will improve appearance when intake is already adequate. A useful choice starts with the full label, the amount per serving and your existing supplements. OstroVit Biotin Plus combines biotin, zinc, selenium and folic acid; its current label is unusually important to read because it lists 2,500 µg biotin and 800 µg folic acid per serving.
What “beauty vitamins” can and cannot mean
Searches for hair, skin and nail supplements often begin with a practical concern: a person wants to compare nutrients and understand whether a formula is relevant. The EU register permits nutrient-function claims such as biotin contributing to the maintenance of normal hair and skin, zinc contributing to the maintenance of normal hair, skin and nails, and selenium contributing to the maintenance of normal hair and nails. A product can use a relevant claim only when it meets the legal “source of” condition for the nutrient.
“Maintenance of normal” is not the same as growing thicker hair, reversing hair loss, clearing a skin condition or making nails grow faster. The authorised wording does not promise a visible change, and it is not evidence that a higher intake creates a greater effect. Keeping those distinctions clear makes it easier to compare formulas without being swayed by broad beauty language.
The roles of the four nutrients in this formula
Biotin: a B vitamin with several metabolic roles
Biotin, also called vitamin B7, acts as a cofactor for enzymes involved in normal metabolism of fats, carbohydrates and amino acids. The EU-authorised claim for hair and skin is a maintenance claim, not a treatment for thinning hair or a cosmetic result. Biotin occurs in varied foods, including eggs, meat, fish, seeds, nuts and some vegetables. Deficiency is rare among healthy people who eat a varied diet, according to the U.S. National Institutes of Health Office of Dietary Supplements (NIH ODS).
The difference between a nutrient’s normal role and the effect of a supplement matters here. NIH ODS finds the evidence for biotin supplements improving hair, skin or nails in people without a demonstrated deficiency to be limited, with small studies and case reports rather than strong controlled evidence. Therefore, a biotin-containing product may be a convenient option for someone who has decided a multi-nutrient format suits their routine, but it should not be presented as a proven solution to hair shedding or a skin concern.
Zinc: a mineral used in many normal processes
Zinc has authorised EU claims for maintenance of normal hair, skin and nails, and it contributes to normal macronutrient metabolism, DNA synthesis and cell division. Zinc is present in foods such as meat, dairy products, eggs, beans, nuts and seeds. A supplement label helps show the amount being added, but it does not tell you whether your overall intake is low or whether a cosmetic concern is related to zinc.
When comparing products, check zinc from all supplements and fortified foods, not just the product you are considering. A “beauty” blend can overlap with a multivitamin or another zinc product. If you use medicines or have a health condition, ask a pharmacist or clinician whether the product is suitable and how to time it; do not combine products solely because their labels describe different benefits.
Selenium: a trace mineral, not a “more is better” ingredient
Selenium contributes to the maintenance of normal hair and nails under EU-authorised claims. The same regulation includes permitted claims for normal thyroid function, immune-system function and protection of cells from oxidative stress, where the relevant source conditions are met. Selenium is a trace mineral, so the sensible comparison is the stated amount and the rest of your intake, rather than a search for the highest percentage on a label.
Folic acid: included, but not a hair-growth ingredient
Folic acid is the synthetic form used in supplements and fortified foods; folate is found naturally in foods such as leafy greens, legumes and some other vegetables. Folate has authorised claims related to blood formation, cell division and maternal tissue growth during pregnancy, subject to conditions. These functions explain why folic acid may appear in a multi-nutrient formula, but they do not make it a proven hair-growth ingredient.
The product listing declares 800 µg folic acid per serving. This is a meaningful amount to account for if you already take a multivitamin or a pregnancy-specific product. People planning pregnancy, pregnant or breastfeeding should choose folic-acid products with their healthcare professional, rather than treating this general beauty formula as a prenatal substitute. Latvia’s SPKC guidance discusses folic acid before and during pregnancy and recommends coordinating supplement choices with the pregnancy-care professional.
How to read the OstroVit Biotin Plus label
The current MiglaVita listing describes one tablet as providing 2,500 µg biotin, 15 mg zinc, 100 µg selenium and 800 µg folic acid. The ingredient list identifies D-biotin, zinc picolinate, L-selenomethionine and pteroylmonoglutamic acid (folic acid), alongside tablet excipients. Check the live product page before ordering because stock, directions and product information can change.
The label’s reference-intake percentages are not a personal prescription. In particular, 5,000% RI for biotin is a comparison with the label’s reference intake value; it does not mean a person needs that amount or will get five thousand percent more benefit. Look at the amount in micrograms or milligrams, compare it with other products you use, and follow the manufacturer’s directions. A combination product is convenient when you want those declared nutrients in one format; it may be less appropriate if you only want to add one specific nutrient or if another product already covers the same ingredients.
For a direct look at the formula, ingredients and current availability, see OstroVit Biotin Plus at MiglaVita. If you prefer to compare other beauty-oriented formats, browse the MiglaVita hair, skin and nails collection.
A sensible way to decide whether the formula fits
This type of combination may appeal to adults who want a single tablet with biotin, zinc, selenium and folic acid, and who have checked that the formula does not duplicate their other products. It is also useful for shoppers who want to compare actual amounts rather than choose on a phrase such as “for beauty.”
Start with your routine: do you already take a multivitamin, zinc or folic acid? Is your aim to cover a known dietary gap, or are you hoping to treat a new symptom? A persistent change in hair, nails or skin can have many explanations; a supplement is not a substitute for identifying the cause. For ordinary shopping, compare labels and avoid unnecessary overlap. For a health concern, medication use, pregnancy or breastfeeding, ask a healthcare professional about the specific formula and amount.
One practical safety point: biotin and laboratory tests
High intakes of biotin can interfere with some laboratory tests that use biotin-based assay technology, including certain hormone tests. The amount at which interference occurs depends on the test and situation; NIH ODS reports interference in studies and cases at higher doses, including a 10 mg dose taken within 24 hours of thyroid testing. OstroVit Biotin Plus lists 2.5 mg per serving, so that example should not be treated as an exact threshold for this product. If you are having blood tests, tell the clinician and laboratory staff that you use a biotin-containing supplement and follow their instructions. Do not stop prescribed treatment or change supplement use before testing without professional guidance.
Frequently asked questions
Does biotin make hair grow faster?
There is no strong evidence that extra biotin makes hair grow faster in healthy people who already get enough. The EU claim concerns maintenance of normal hair, and NIH ODS describes the evidence for supplement benefits in people without deficiency as limited.
Why do zinc and selenium appear in a hair-and-nails formula?
Both have authorised EU claims for maintenance of normal hair and nails; zinc also has an authorised claim for normal skin. These statements refer to nutrient functions and apply only when the product meets the relevant “source of” condition. They do not guarantee a cosmetic outcome.
Is folic acid included to support hair?
Not specifically. Folic acid contributes to normal physiological functions including blood formation and cell division. Its inclusion in a blend does not prove that it promotes hair growth. The 800 µg declared for this formula should be counted alongside any other folic-acid product.
Should I take a supplement for brittle nails or hair shedding?
Not automatically. First compare your diet and all supplements, and consider discussing persistent or sudden changes with a healthcare professional. A multi-nutrient product may be convenient if its ingredients and amounts fit your situation, but it cannot identify or treat the cause.
What should I do before a blood test if I use biotin?
Tell the clinician and laboratory staff about the product and follow their test-specific advice. Biotin can affect some assays; there is no single washout interval that can safely be assumed for every test and person.
Sources and editorial notes
Verified: 16 October 2026. Primary Latvian keyword: biotīns matiem. Secondary keywords: biotīns ādai un nagiem; cinks matiem un nagiem; selēns matiem un nagiem; biotīna uztura bagātinātājs; biotīns un asins analīzes.
Suggested internal links: OstroVit Biotin Plus; MiglaVita hair, skin and nails collection.
Image alt text: Eggs, spinach, mushrooms, avocado, almonds, sunflower seeds and oats arranged on a sunlit stone surface.
General educational information, not individual medical advice.
