Best Hair Growth Vitamins
Hair loss, thinning, and slow growth affect millions of men and women, often caused by nutritional deficiencies, hormonal changes, stress, or aging. While genetics play a role, ensuring adequate intake of key vitamins and minerals can significantly support healthy hair growth, thickness, and overall hair health. Hair growth vitamins combine biotin, collagen, keratin, and essential nutrients that nourish hair follicles from within, helping you achieve the fuller, stronger, more vibrant hair you desire.
Our Top Picks at a Glance
- Best Overall: NUTRAHARMONY Biotin with Collagen & Keratin – comprehensive 25,000mcg formula
- Best Value: Micro Ingredients Hair Growth Vitamins – 14-in-1 formula with 120 capsules
- Best Bioavailable: Liquid Biotin & Collagen Drops – 60,000mcg liquid for maximum absorption
Quick Comparison
| Product | Key Ingredients | Biotin Dose | Servings | Best For |
|---|---|---|---|---|
| NUTRAHARMONY Biotin Complex | Biotin, Collagen, Keratin, Hyaluronic Acid | 25,000mcg | 30 | Comprehensive support |
| Micro Ingredients 14-in-1 | Biotin, Collagen, Keratin, Saw Palmetto | 10,000mcg | 60 | Best value |
| Liquid Biotin & Collagen | Biotin, Hydrolyzed Collagen | 60,000mcg | 60 | Liquid absorption |
| SimplyVital Biotin | Biotin, Marine Collagen, Keratin | 5,000mcg | 30 | Clean formula |
| Maple Holistics Complex | Biotin, Collagen, Horsetail, Saw Palmetto | 10,000mcg | 30 | DHT blocker included |
| Men’s Hair Growth | Biotin, Collagen, Zinc, Selenium | Varied | 120 | Men’s formula |
| IQ Biology 30,000mcg | Biotin, Collagen, Keratin, MSM | 10,000mcg | 30 | Extra strength |
1. NUTRAHARMONY Biotin with Collagen & Keratin – Best Overall
- BIOTIN, COLLAGEN & KERATIN — a beauty multicomplex of Biotin, Collagen, Keratin, Hyaluronic Acid, Vitamin B-complex, Vitamins A & E, and natural botanical extracts. Each serving is designed to provide well-rounded nutritional support and complement a consistent beauty routine.
- HAIR SUPPORT — Provides nutrients that support the normal hair growth cycle and help maintain hair strength and structure.*
- NAIL & SKIN HEALTH — Supports healthy nails and skin by helping maintain nail strength and resilience and supporting skin hydration and elasticity for a smoother-looking appearance.*
- CLINICALLY TESTED — 80 women took part in a 90-day study, and the results showed support for a normal, healthy hair growth cycle, and visible improvements in scalp skin appearance. **Study #1-0602, 2024.
- THOUGHTFULLY FORMULATED — made without GMOs, gluten, unnecessary additives, or harsh fillers. NUTRAHARMONY focuses on clarity, quality, and ingredient transparency.
This comprehensive beauty complex delivers 25,000mcg biotin combined with collagen, keratin, hyaluronic acid, complete B-vitamin complex, and botanical extracts for superior hair, skin, and nail support.
NUTRAHARMONY’s formula features biotin (vitamin B7), fish collagen, hydrolyzed keratin, hyaluronic acid, plus vitamins A, D3, B1, B2, B3, B6, B12, folic acid, and pantothenic acid. Enhanced with natural extracts including MSM, bamboo extract (70% silica), coconut oil, nettle extract, and grape seed extract, this proprietary blend provides well-rounded nutritional support. The combination addresses hair growth from multiple angles: biotin for keratin production, collagen for hair structure, and supporting nutrients for follicle health.
What We Like
- High 25,000mcg biotin dose
- Complete B-vitamin complex
- Includes collagen, keratin, and hyaluronic acid
- Botanical extracts for enhanced support
- Made in USA with quality ingredients
What Could Be Better
- Only 30-day supply
- Proprietary blend doesn’t list individual amounts
Bottom Line: If you want a comprehensive hair, skin, and nail formula that combines proven vitamins with supportive botanicals in clinical doses, NUTRAHARMONY provides exceptional breadth of nutrients for total beauty support.
2. Micro Ingredients Hair Growth Vitamins – Best Value
- Micro Ingredients offers 120 extra-strength capsules of a 14-in-1 hair vitamins complex, enjoy essential women and men hair nourishing nutrients that include vitamins, minerals, and antioxidants.
- Each 2-capsule serving size provides 1,000mcg vitamin A, 100mg vitamin C, 20mcg vitamin D, 400mcg folate, 5mcg vitamin B12, 5,000mcg biotin, 10mg iron, 10mg zinc, 500mg saw palmetto, 500mg ashwagandha, 50mg bamboo extract, 50mg hydrolyzed collagen peptides, and 50mg hydrolyzed keratin.
- Key hair micronutrients like vitamin A, B12, C, folate, and saw palmetto are designed to combat signs of thinning and shedding.
- The addition of biotin, zinc, keratin, iron, and collagen work together to promote strength and thickness for existing hair and new growth.
- Premium non-GMO ingredients, made without soy, dairy, gluten, wheat, peanuts, and tree nuts. Each batch goes through 3rd party lab tests to ensure a product that is safe, pure, and potent.
This 14-in-1 extra-strength formula combines biotin, collagen, keratin, saw palmetto, and essential vitamins in 120 capsules for exceptional value and comprehensive hair nourishment.
Micro Ingredients delivers biotin (10,000mcg), zinc, keratin, iron, and hydrolyzed collagen working synergistically to promote strength and thickness for existing hair and new growth. The premium non-GMO formula is made without soy, dairy, gluten, wheat, peanuts, or tree nuts. Each batch undergoes third-party lab testing to ensure safety, purity, and potency. The hydrolyzed ingredients break down to fine particle sizes for easy digestion and superior absorption.
What We Like
- 120 capsules provide excellent value
- 14 hair-nourishing ingredients
- Includes saw palmetto for DHT support
- Third-party tested for quality
- Free from major allergens
What Could Be Better
- Requires two capsules per serving
- Moderate biotin dose compared to ultra-high options
Bottom Line: Budget-conscious consumers seeking comprehensive hair growth support with proven ingredients backed by third-party testing will find Micro Ingredients offers outstanding quality and quantity per dollar.
3. Liquid Biotin & Collagen Hair Growth Drops – Best Bioavailable
- Biotin is Essential For Support of Healthier Hair & Nails - Men & women can benefit from healthy hair and skin support with our liquid Biotin Collagen. Our Biotin Collagen liquid drops can also help support strong thick nails.
- Rich and Smooth Flavor - Berry flavor Biotin Collagen liquid goes down smooth and tastes great! our biotin Collagen supplement is a delicious, effective and easy to swallow alternative to pills, capsules, and powders. Our formula contains no gluten, soy, sugar, milk, yeast, salt, or wheat.
- B-Complex Family - Biotin is a co-enzyme and one of several B vitamins that support healthy body functions such as metabolism. Nourish your skin and hair from the inside out with Pure Research liquid Biotin Collagen.
- A Brand You Can Trust - We are proud of the quality & purity of every bottle of Biotin we sell. But if for some reason we do not meet your expectations, do not hesitate to contact us. We stand behind our biotin collagen beauty drops, and will do our best to make things right. Customer satisfaction is our top priority.
This ultra-high-potency liquid formula delivers 60,000mcg biotin with hydrolyzed collagen in easily absorbed drops that bypass digestion for maximum effectiveness.
Pure Research’s liquid biotin and collagen provides superior bioavailability compared to capsules, as the body processes liquid supplements more readily. The berry-flavored drops go down smooth and taste great, offering a pleasant alternative to pills and capsules. The formula supports hair growth from within, giving your hair the nourishment needed for strength, shine, and thickness. It also enhances skin elasticity, moisture retention, and radiance while supporting stronger, healthier nails.
What We Like
- Exceptionally high 60,000mcg biotin
- Liquid form for superior absorption
- Pleasant berry flavor
- Easy to take for those who dislike pills
- Supports hair, skin, and nails
What Could Be Better
- Requires refrigeration after opening
- Natural separation may occur (shake before use)
Bottom Line: People who want maximum biotin potency in the most bioavailable liquid format will appreciate Pure Research’s high-concentration drops that deliver nutrients rapidly and efficiently.
4. SimplyVital Biotin and Collagen – Best Clean Formula
- Biotin Supplement with Collagen - SimplyVital biotin vitamins combine biotin 5000 mcg, marine collagen peptides, keratin, and essential vitamins to support healthy hair, skin, and nails. This powerful blend is designed as hair vitamins for women, it promotes radiant skin, strong nails, and luscious hair. Perfect for those seeking high-quality biotin and collagen supplements or effective hair, nails, skin vitamins for women.
- Hair Vitamins - Packed with nutrients like vitamin B complex, vitamin B1, vitamin B6, vitamin B12, biotin, collagen, and keratin, this supplement promotes healthier hair. Vitamin B1 and vitamin B6 nourish the scalp and support healthy hair, while vitamin B12 boosts oxygen and nutrient delivery to hair roots. Combined with biotin collagen keratin supplement, it strengthens and enhances your hair's shine and vitality.
- Nail and Skin Vitamins - Packed with collagen biotin, this powerful combination helps strengthen your nails for a healthy, long-lasting appearance. Collagen with biotin supports skin elasticity, promoting glow, while biotin supplements help maintain skin moisture and balance. Perfect for hair skin nails, our formula is designed to support beauty from within.
- Beauty Support Formula - This supplement combines biotin and collagen to support overall health and beauty. With key ingredients like biotin for hair growth women and collagen and biotin for women, it helps promote stronger hair, nails, and glowing skin. When taken consistently, this blend of hair and nails vitamins for women can deliver visible improvements.
- Exceptional Quality - We are dedicated to delivering high-quality hair, nails, and skin vitamins that exceed your expectations. If for any reason we don’t meet those expectations, please reach out to us, and we’ll make it our priority to resolve the issue promptly. Our biotin collagen formula is proudly made in the USA using only carefully selected ingredients to support your health and beauty.
This clean-label formula combines 5,000mcg biotin with marine collagen peptides, keratin, and essential vitamins in a supplement free from GMOs, artificial colors, gluten, and corn syrup.
SimplyVital’s blend includes biotin for hair growth, marine collagen for structure and shine, keratin for strength, plus vitamin B complex (B1, B6, B12), folic acid, and pantothenic acid. The comprehensive nutrient profile promotes healthier hair while supporting radiant skin and strong nails. Made in the USA using carefully selected ingredients with no fillers, titanium dioxide, or artificial colors, this formula prioritizes purity and natural effectiveness.
What We Like
- Clean formula without fillers or additives
- Marine collagen peptides
- Complete B-vitamin support
- Made in USA with quality sourcing
- Supports hair, skin, and nails comprehensively
What Could Be Better
- Lower biotin dose than ultra-strength options
- Only 30-day supply
Bottom Line: Health-conscious consumers seeking a clean, effective hair vitamin without unnecessary additives or fillers will appreciate SimplyVital’s transparent, quality-focused approach to beauty supplementation.
5. Maple Holistics Biotin Complex with Saw Palmetto – Best DHT Blocker
- Hello Hair Growth - Hair growth for women and men can be tough but most other biotin vitamins for hair skin and nails don’t have as many hair vitamins for thicker hair growth for men and women as us
- Unique Complex - Try our one of a kind biotin for hair growth supplement with iron zinc marine collagen and horsetail herb for hair growth for the ideal hair supplement for strength and thickness
- Star Ingredients - Unlike many other biotin and collagen supplements we use balanced levels of fish collagen for hair growth with horsetail extract and carefully chosen multi vitamins for hair growth
- Head to Toe Benefits - Count on us for all your beauty needs with our proprietary hair and nails vitamins for women for stronger faster growing and flaunt worthy hair and nails plus glowing skin
- Maple Holistics Quality - We’re proud to be a leading name in hair growth products with vitamins minerals and herbs because we believe in real ingredients for real results you can feel good about
This unique formula combines biotin and collagen with saw palmetto (250mg) and horsetail extract to block DHT and support thicker hair growth for both women and men.
Maple Holistics’ complex features 10,000mcg biotin, marine collagen blend (100mg), hydrolyzed keratin (100mg), saw palmetto extract (250mg), and horsetail stem extract (30mg) for comprehensive hair support. The saw palmetto acts as a natural DHT blocker, addressing hormonal hair loss, while iron, zinc, and vitamin C support follicle health. Enhanced with vitamins A, B-complex, calcium, iodine, and selenium, this formula provides balanced nutrition for stronger, faster-growing hair.
What We Like
- Includes saw palmetto DHT blocker
- Horsetail extract for silica support
- Marine collagen and keratin
- Comprehensive mineral profile
- Addresses hormonal hair loss
What Could Be Better
- Two capsules required per serving
- Contains fish (not suitable for vegetarians)
Bottom Line: People experiencing hormonal hair thinning or DHT-related hair loss will benefit from Maple Holistics’ targeted formula that combines traditional hair vitamins with saw palmetto DHT-blocking support.
6. Men’s Hair Growth Supplement – Best for Men
- Hair Growth Products for Men – Targeted Support – Formulated to combat thinning and support stronger, thicker hair using a powerful blend of vitamins, minerals, and nutrients.
- Hair Vitamins with Biotin and Collagen – Features biotin for hair growth men trust, plus collagen, zinc, and selenium for healthy follicles and scalp nourishment.
- Complete Hair Skin and Nails Vitamins – Supports not only hair growth, but also promotes clear skin and strong nails with Vitamins A, C, E, B5, and D3.
- Biotin for Hair Growth Men Need – Just 2 capsules a day for a full month of support—perfect for men looking to restore confidence from root to tip.
- Clean & Effective Hair Growth Vitamins – Non-GMO, gluten-free, and made in the USA in a GMP-certified facility. No artificial fillers—just high-quality ingredients that deliver.
Specifically formulated for men’s hair health needs, this 240-capsule formula combines biotin, collagen, zinc, selenium, and vitamins A, C, D, E for comprehensive follicle and scalp support.
This men’s formula features biotin for keratin production, collagen for hair structure, zinc for follicle health, and selenium for antioxidant protection. Enhanced with vitamins A, C, E, B5, and D3, the supplement supports not only hair growth but also promotes clear skin and strong nails. The clean, effective formulation is non-GMO, gluten-free, and made in the USA in GMP-certified facilities with no artificial fillers. Just two capsules daily provide a full month of support.
What We Like
- 240 capsules for 4-month supply
- Specifically formulated for men
- Includes zinc and selenium
- Clean formula without fillers
- Made in USA GMP facility
What Could Be Better
- Biotin dose not specified on listing
- May benefit from saw palmetto addition
Bottom Line: Men seeking a clean, comprehensive hair growth supplement designed specifically for male hair health needs will find this formula provides excellent value with a generous supply and targeted nutrient profile.
7. IQ Biology Biotin 30,000mcg Complex – Best Extra Strength
- Biotin Collagen & Keratin Hair Growth Complex – Biotin capsules for hair growth women & men with Keratin, Collagen and Hyaluronic Acid help strengthen brittle nails, nourish skin for a healthy glow, support hair thickness. Elevate your beauty routine with Biotin 10000mcg with Collagen, also enchenced with MSM, Coconut oil and Silica for hair growth. Formulated with a vitamin B complex including folic acid and vitamin B12 this hair growth supplement supports healthier skin, and stronger nails.
- Biotin and Collagen Supplements for Immune & Antioxidant Support – IQ BIOLOGY’s Biotin 10000 mcg plus Keratin hair and nails supplement goes beyond beauty by offering powerful immune support and a potent antioxidant boost. This Biotin extra strength formula with Astragalus, MSM, Hyaluronic Acid, and Grape Extract helps protect your body from adverse environmental factors, while antioxidants support healthy hair, skin, and nails for best daily results.*
- Complete Hair Growth Vitamins – With IQ BIOLOGY’s skin, hair, and nails capsules, you no longer need multiple products. This hairgrowth vitamin combines Biotin, Collagen, and Keratin to promote stronger, thicker hair, healthy nails, and glowing skin. As premium hair vitamins to support healthy hair density for women and men, our capsule formula offers higher potency and better absorption than gummies, supporting visible results typically appear after 3–6 months of consistent daily use.*
- Hair Vitamins for Hair Loss & Thickness Support – Trust IQ BIOLOGY womens hair vitamins and men’s Biotin formula to deliver essential nutrients. Each capsule provides Biotin 5000mcg with Collagen and Keratin to strengthen and thicken hair from the inside out (biotina y colageno in Spanish). Unlike topical products, Biotin pills from within and, when combined with external care, helps reduce breakage and thinning for visibly stronger hair.
- High-Quality Hair Growth Complex – IQ BIOLOGY’s Biotin tablets for hair, skin, and nails deliver premium vitamin B7 (vitamina B7 in Spanish) with astragalus root extract to support stronger nails, vibrant skin, and healthy hair growth. Doctor-formulated and clinically tested in the USA, this pure formula contains no artificial colors or additives, ensuring consistent quality, purity, and daily results for both women and men.* Formulated for safe, long-term daily use when taken as directed.
This extra-strength formula delivers 10,000mcg biotin enhanced with collagen, keratin, MSM, hyaluronic acid, and immune-supporting botanicals in a comprehensive beauty complex.
IQ Biology’s proprietary blend includes MSM, hydrolyzed keratin, bamboo extract (70% silica), coconut oil, stinging nettle extract, grape extract, fish collagen, astragalus extract (50mg), and hyaluronic acid (10mg). The formula goes beyond basic beauty support by offering immune support and antioxidant benefits through astragalus, MSM, and grape extract. Complete with vitamins A, D3, B-complex, and essential minerals including calcium, the supplement provides comprehensive nutritional support for hair, skin, nails, and overall wellness.
What We Like
- Extra-strength comprehensive formula
- Includes immune-supporting astragalus
- MSM for collagen synthesis
- Hyaluronic acid for hydration
- Complete vitamin and mineral support
What Could Be Better
- Contains fish and tree nuts (allergen concerns)
- Proprietary blend doesn’t specify individual amounts
Bottom Line: People wanting maximum-strength hair support enhanced with immune-boosting and antioxidant ingredients will appreciate IQ Biology’s comprehensive approach that addresses beauty and wellness simultaneously.
How to Choose the Best Hair Growth Vitamins
Biotin (vitamin B7) is the most researched nutrient for hair health, supporting keratin protein production that forms the structure of hair strands. Clinical studies use doses ranging from 2,500mcg to 10,000mcg daily, with some extra-strength formulas providing 25,000mcg or more. While higher doses aren’t necessarily better, deficiency definitely impairs hair growth. Choose formulas with at least 5,000-10,000mcg biotin for therapeutic support, understanding that excess biotin is water-soluble and excreted.
Collagen provides amino acids (particularly glycine, proline, and hydroxyproline) that your body uses to build hair proteins. Marine collagen peptides absorb efficiently and integrate into hair structure. Look for hydrolyzed collagen in doses of 100-500mg or more. Type I and III collagen specifically support hair, skin, and nail tissues. Keratin, the actual structural protein of hair, provides direct building blocks when hydrolyzed into bioavailable peptides.
Essential vitamins and minerals beyond biotin significantly impact hair health. Vitamin A supports sebum production for scalp health. B-complex vitamins (B6, B12, folate, pantothenic acid) aid in red blood cell production and oxygen delivery to follicles. Vitamin C enables collagen synthesis and iron absorption. Vitamin D influences hair follicle cycling. Vitamin E provides antioxidant protection. Iron deficiency causes hair loss, particularly in women. Zinc supports follicle health and protein synthesis. Selenium protects follicles from oxidative damage.
For hormonal hair loss, particularly DHT-related thinning in men and women, look for formulas including saw palmetto (250-320mg). This herb inhibits 5-alpha-reductase enzyme that converts testosterone to DHT, the hormone responsible for pattern baldness. Pumpkin seed oil offers similar DHT-blocking properties. These ingredients address the root cause of hormonal hair thinning rather than just providing nutrients.
Consider delivery format based on your preferences and absorption needs. Capsules offer convenience and precise dosing. Liquid drops provide superior bioavailability as they bypass some digestive breakdown. Gummies taste pleasant but may contain added sugars. For maximum absorption, choose formulas with hydrolyzed proteins (collagen, keratin) broken down into smaller peptides your body readily absorbs.
Benefits of Hair Growth Vitamins
Biotin deficiency, while uncommon in developed countries, causes telogen effluvium (excessive shedding) and impairs keratin production. Even subclinical deficiency may compromise hair health. Biotin supplementation at therapeutic doses (5,000-10,000mcg) strengthens existing hair, reduces breakage, and supports healthy growth rates. Studies show biotin improves hair quality in people with underlying deficiency or brittle hair syndrome.
Collagen supplementation provides the amino acid building blocks your body uses to synthesize keratin and other structural proteins. As we age, collagen production declines, potentially contributing to hair thinning and reduced density. Supplementing with hydrolyzed collagen peptides (2,500-10,000mg daily) supports hair thickness, reduces breakage, and may improve growth rates. Marine collagen shows particularly good absorption and integration into hair tissue.
Iron deficiency is the most common nutritional cause of hair loss, especially in menstruating women. Iron supports hemoglobin production, which carries oxygen to hair follicles. Without adequate oxygen delivery, follicles cannot sustain healthy growth. Hair vitamins containing gentle iron forms (bisglycinate or ferrous fumarate at 15-18mg) help maintain iron stores necessary for optimal hair growth, particularly when combined with vitamin C for enhanced absorption.
Comprehensive hair vitamin formulas address multiple potential deficiencies simultaneously rather than gambling on single nutrients. Since hair health depends on numerous vitamins and minerals working together, multi-nutrient formulas provide insurance against deficiencies you may not know you have. The synergistic combination often produces better results than isolated biotin, as supporting nutrients enable biotin’s effectiveness.
Frequently Asked Questions
How long before I see results from hair growth vitamins?
Hair grows approximately half an inch per month, so visible improvements typically require two to three months of consistent supplementation. You may notice reduced shedding or breakage within four to eight weeks as existing hair strengthens. New growth from improved follicle function becomes apparent around three to six months. Hair growth vitamins work cumulatively, so continue supplementation for at least six months before fully evaluating effectiveness.
Can biotin supplements cause acne?
High-dose biotin can cause acne breakouts in some individuals, though this isn’t universal. Biotin may interfere with vitamin B5 (pantothenic acid) absorption, and B5 deficiency is associated with acne. If you experience breakouts after starting biotin, try reducing the dose, ensuring adequate B5 intake (5-10mg daily), or choosing formulas that include B-complex vitamins rather than isolated biotin.
Will hair growth vitamins work for hormonal hair loss?
Hair vitamins provide nutrients necessary for healthy growth but don’t directly address hormonal causes like DHT-related pattern baldness or thyroid issues. For hormonal hair loss, choose formulas including saw palmetto or pumpkin seed oil that block DHT conversion. Combine hair vitamins with medical treatments (minoxidil, finasteride for men) for comprehensive management. Address underlying hormonal imbalances through medical care for best results.
Are hair vitamins safe during pregnancy?
Most hair vitamin ingredients (biotin, B-vitamins, vitamin C, iron) are safe during pregnancy, and prenatal vitamins contain many of these nutrients. However, some formulas include herbs like saw palmetto that aren’t recommended during pregnancy. Always consult your healthcare provider before taking any supplements while pregnant or nursing. Prenatal vitamins often provide sufficient support for hair health during pregnancy.
Can men and women use the same hair vitamins?
Yes, most hair vitamin formulas work for both sexes since hair biology is fundamentally similar. However, men may benefit from formulas including DHT blockers like saw palmetto for pattern baldness prevention. Women of childbearing age need adequate iron, which men’s formulas may omit. Gender-specific formulas optimize nutrient ratios for sex-specific needs, but unisex formulas provide comprehensive support for either gender.
Should I take hair vitamins with food?
Taking hair vitamins with meals enhances absorption of fat-soluble vitamins (A, D, E) and reduces potential digestive upset from concentrated nutrients. Biotin absorbs well with or without food, but iron (if included) absorbs best on an empty stomach. However, if iron causes nausea, taking with food improves tolerance despite slightly reduced absorption. For maximum benefit and minimal side effects, take hair vitamins with breakfast or lunch.
Do I need to take hair vitamins forever?
Hair vitamins work while you take them, supporting healthy growth through consistent nutrient delivery. If you address an underlying deficiency, you may maintain results with improved diet after several months of supplementation. However, if deficiency recurs or your diet remains inadequate, hair quality may decline when you stop. Many people choose ongoing supplementation as nutritional insurance for optimal hair health long-term.
Can I take too much biotin?
Biotin is water-soluble, so excess is excreted in urine rather than accumulating to toxic levels. There’s no established upper limit for biotin intake. However, very high doses (10,000mcg+) can interfere with laboratory tests for thyroid function, cardiac markers, and hormone levels, potentially causing false results. Inform your healthcare provider about biotin supplementation before blood work, and stop taking biotin 48-72 hours before lab tests if possible.
