Vitamins help hair growth mainly when you are short on a nutrient, and a supplement cannot fix hair loss with another cause. This guide covers 6 nutrients, who actually needs them, and what 3 Remedy’s hair products state on their labels.
Updated November 2026. Product facts come from our own labels and product pages, checked on 9 November 2026.
Quick Answer: What Are the Best Vitamins for Hair Growth?
The best vitamins for hair growth are the ones that fix a measured shortfall, most often 4 nutrients: iron, zinc, vitamin D or biotin. In healthy people the evidence for hair supplements is limited. Ask a clinician for blood tests first, then choose a product whose label shows exact amounts and warnings.
Key Takeaways
- Hair loss has many causes, but only 4 nutrients matter most.
- Biotin helps documented deficiency; a review found 18 improved cases.
- Biotin at 5,000 mcg can distort thyroid and troponin blood tests.
- Hair Beyond Compare lists 12 herbs plus 5,000 mcg biotin per capsule.
- Patchy or ongoing loss for 3 months needs a doctor, not a supplement.
Related Products
What the evidence says about vitamins for hair growth
Hair follicles need steady nutrients, so a real deficiency can thin hair. Reviews link low iron, zinc, vitamin D and some B vitamins to hair loss, but the studies are mixed. Extra vitamins in people who are not low have little proof of making hair grow faster.
- Iron, zinc, B vitamins: a 2024 review of androgenetic alopecia found deficiencies in these were associated with higher risk, and some supplementation studies showed benefit. [1]Micronutrients and androgenetic alopecia View source
- Vitamin D: most studies show an inverse relationship between vitamin D levels and non-scarring hair loss. [2]Role of vitamin D in hair loss View source
- Biotin: a systematic review found 18 reported cases of improvement, all in people with an underlying cause, and called evidence in healthy people limited. [3]A review of the use of biotin for hair loss View source
- Overall: a 2019 review calls the evidence on vitamins and minerals in hair loss large but conflicting. [4]The role of vitamins and minerals in hair loss View source
Our article on what biotin does for hair goes deeper on that one vitamin.
How to choose a hair vitamin
These 6 checks apply to every product, ours included. We list only what a label or product page states.
| Check | What to look for | Why it matters |
|---|---|---|
| Test first | Ferritin, vitamin D and zinc through a clinician | Supplements work best on a measured shortfall |
| Exact amounts | Micrograms or milligrams for each nutrient | Proprietary blends hide per-herb doses |
| Biotin dose | The %DV printed next to the amount | 5,000 mcg is 16,667% of the daily value on our label |
| Lab-test warning | A line about blood-test interference | High-dose biotin can skew results |
| Allergens | Tree nuts, sesame, gelatin capsule | Several hair herbs are common allergens |
| Warnings | Pregnancy, blood thinners, liver | Hair herbs can interact with medicines |
Disclosure: We make the 3 products below, so we are also a seller. We did not list other brands, because we could not verify their label details on 9 November 2026.
Remedy’s hair products compared: label facts
Checked 9 November 2026. Prices are from our product pages and can change.
| Product | Directions and size | Key label contents | Price | Allergens and notes |
|---|---|---|---|---|
| Biotin 5000 mcg | 1 capsule daily; 60 capsules | Biotin 5,000 mcg (16,667% DV); gelatin capsule, cellulose, magnesium stearate, silica | $18.99 | Gelatin capsule; label lists no gluten, dairy, soy or corn |
| Hair Beyond Compare™ | 1 capsule daily; 60 capsules | Biotin 5,000 mcg plus a 1,000 mg proprietary blend of 12 herbs: fo-ti, horsetail, hyaluronic acid, black sesame seed, kudzu, burdock, boswellia, black walnut, ginkgo, saw palmetto, rosemary, cayenne | $34.99 | Vegan cellulose capsule; contains black walnut (tree nut) and sesame; herb amounts not disclosed |
| Hair Power Pack™ | 3 bottles; 5 capsules a day in total | Hair Beyond Compare, Ultimate Multi-Mineral and Mega VMT; biotin 5,630 mcg and vitamin D3 3,020 IU a day across 2 bottles | $77.99 | Contains black walnut and sesame; Mega VMT lists vitamin B6 at 105 mg, above the adult upper limit of 100 mg |
- Biotin 5000 mcg costs about $0.32 a day at the label dose.
- Hair Beyond Compare costs about $0.58 a day, with biotin included.
Which hair product fits you
- One nutrient: Biotin 5000 mcg.
- Biotin plus 12 herbs: Hair Beyond Compare.
- Nutrients and herbs together: Hair Power Pack, 3 bottles.
Biotin 5000 mcg
A single-ingredient capsule. Choose it if you and your clinician suspect low biotin and want one variable. Skip it if you take lab tests soon, or if a gelatin capsule does not suit your diet.
Hair Beyond Compare™
The 12-herb capsule adds a blend to the same 5,000 mcg of biotin. Choose it if you want broad herbal support in one daily capsule. Skip it if you are pregnant or breastfeeding, allergic to tree nuts or sesame, take blood thinners, or have liver problems.
Hair Power Pack™
Three bottles, 5 capsules a day. Choose it only if you want nutrients and herbs together. Count the stacking first: biotin and vitamin D come from 2 bottles, and black walnut sits in 2. Do not add a separate biotin.
If a blood test shows low iron, zinc or vitamin D, use the amount your clinician sets for that nutrient. Our vitamin D page can help you estimate a daily vitamin D dose to discuss with them.
Safety, lab tests and who should skip these
Hair supplements are not risk-free. High-dose biotin can change lab results, and fo-ti is linked to liver injury reports. Talk to a clinician before starting if any item below applies.
- Blood tests: biotin can interfere with immunoassays, including troponin and thyroid tests. Tell your lab you take it. [5]Biotin interference in high-sensitivity troponin assays View source
- Fo-ti: Polygonum multiflorum has immune-mediated liver injury reports. Stop and call a clinician for dark urine or yellow skin. [6]The hepatotoxicity of Polygonum multiflorum View source
- Pregnant or breastfeeding: do not use Hair Beyond Compare.
- Blood-sugar drugs or anticoagulants: ask your physician first.
- Tree nut or sesame allergy: do not use the herbal products.
See a doctor for patchy hair loss, sudden heavy shedding, a painful or red scalp, or loss that continues for 3 months. Our guide to biotin side effects and lab test interference explains the testing issue.
Frequently Asked Questions
Which vitamins make your hair grow the fastest? +
No vitamin is shown to speed growth in people who are not low in it. Correcting a shortfall of iron, zinc, vitamin D or biotin may help, so allow at least 3 months before judging any change.
Can vitamin D stop hair loss? +
Not on its own. Reviews link low vitamin D with several types of non-scarring hair loss, so a blood test is sensible. Correcting a low level is reasonable, but it is 1 possible factor among many.
What are the big 3 for thinning hair? +
Reviews most often name iron, zinc and vitamin D, with B vitamins including biotin as a fourth group. Ask a clinician to check ferritin and vitamin D before you buy 1 product for all of them.
What organ is linked to hair? +
Hair grows from follicles in the skin. Thyroid and iron status also affect the hair cycle, which is why clinicians often order 2 blood tests, thyroid and ferritin, when hair is thinning.
How can I increase hair growth and thickness? +
Start with the cause. A clinician can check iron, vitamin D and thyroid, review medicines and hair-care habits, and decide whether a supplement fits. Judge any change after 3 months, not 3 weeks.
Is biotin enough for hair growth? +
For most people with normal levels, biotin alone has limited proof. A systematic review found improvement only in 18 reported cases with an underlying cause. It may help if you are truly low.
Is 5,000 mcg of biotin too much? +
It is 16,667% of the daily value on our label. High doses can distort lab tests, so tell your lab and doctor and ask whether you need that amount. Stop it before 1 scheduled test only if your clinician advises.
Who should not take Hair Beyond Compare? +
Do not use it in 3 situations: pregnancy or breastfeeding, a tree nut or sesame allergy, or liver problems. Ask your physician first if you take blood-sugar drugs or anticoagulants.
How long before I see results from a hair supplement? +
Our product page says initial results range from several weeks to months with consistent use. Hair cycles are slow, so use 3 months as the first checkpoint and see a doctor if loss continues.
Can I take the Hair Power Pack with a separate biotin? +
We advise against it. The pack already supplies about 5,630 mcg of biotin a day from 2 bottles, so a third source stacks the dose and adds to lab-test interference.
Related Reading
- Biotin dosage: how much and when
- Biotin supplements: the complete guide
- Biotin vs. collagen and stacking for hair
