Table of ContentsView AllTable of ContentsImportant NutrientsProteinCollagenOmega-3 Fatty AcidsZincBiotinIronSeleniumConditions That Cause Hair LossHair Loss TreatmentsFrequently Asked Questions

Table of ContentsView All

View All

Table of Contents

Important Nutrients

Protein

Collagen

Omega-3 Fatty Acids

Zinc

Biotin

Iron

Selenium

Conditions That Cause Hair Loss

Hair Loss Treatments

Frequently Asked Questions

Hair growth supplements purported to treat hair loss (alopecia) typically contain one or a combination of seven vitamins, minerals, and macronutrients essential to hair growth. These are protein, collagen, omega-3 fatty acids, zinc, biotin, iron, and selenium.

Although they have shown some success (particularly when a nutritional deficiency is to blame for hair loss), the safety and effectiveness of hair growth supplements remain unclear.

In the United States, the Food and Drug Administration (FDA) does not regulate supplements the way it regulates prescription drugs. That means some supplement products may not contain what the label says. Whenchoosing a supplement, look for independently tested products and consult a healthcare provider, registered dietitian nutritionist (RD or RDN), or pharmacist.

Important Nutrients for Hair Growth

Thehair follicle cycleis mainly made up of micronutrients (vitamins and minerals).

Here’s a look at the evidence behind some popular supplements used for hair loss.

Hair is primarily made ofproteinslikekeratin, so boosting protein intake could theoretically promote growth.But there’s not much evidence yet.

To function correctly, the body generally needs at least 0.8 grams (g) of protein for every kilogram (kg) of body weight (g/kg). However, the following groups of people need more protein per day:

Taking keratin directly won’t help with hair loss because it can’t be absorbed in the body. Some products marketed for hair growth contain amino acids like cysteine made into keratin in the body.More research is needed before these can be recommended.

Small trials have shown that a product of fish protein can limit hair shedding and increase hair thickness in women with thinning hair.

Female brushing her curly hair with comb in bathroom mirror.Taras Grebinets / Getty Images

Female brushing her curly hair with comb in bathroom mirror

Taras Grebinets / Getty Images

Collagenis a popular supplement for hair, skin, and nails. But there’s not much evidence it lives up to the hype.

Taking 2.5 g a day of collagen peptides increased hair follicles and hair thickness in a small study of 44 healthy females.

A combination product that contained collagen,peptides,lipids, andhyaluronic acidmade hair softer and shinier after eight weeks.However, because multiple ingredients were used, it’s unclear how much of the effect was due to collagen alone.

Loss of eyebrows and hair lightening have been associated with low levels ofomega-3 fatty acids.

Lowzinclevels may cause a specific form of hair loss calledtelogen effluvium, which is typically reversible.But there’s not enough data to know if supplementing with zinc prevents or reverses hair loss or what an optimal dose is.

It’s been studied at 50 milligrams (mg) daily for women with hair loss. In this trial, about half of the women who took zinc reported improvement in hair loss.

Recommended daily levels of zinc for adults are as follows:

Foods high in zinc include the following:

Too much zinc could cause side effects likevomiting and diarrhea.Additionally, taking large doses of zinc for an extended period of time (usually weeks) can result in the following:

The 6 Must-Have Supplements for Thicker, Healthier Hair

Many people usebiotin(vitamin B7) to prevent or treat hair loss. It’s aggressively marketed for this, but there’s very little evidence it works unless you have a biotin deficiency.

In fact, the evidence for using biotin for hair growth is limited to case studies in children with a rare condition called familial uncombable hair syndrome. who used 5 mg of biotin a day.

Adults over age 19 require 30 micrograms (mcg) of biotin daily and 35 mcg during breastfeeding.Protein-rich foods like meat and eggs are good sources of biotin.

Biotin deficiencies are very rare in people who eat a balanced diet. Along with hair loss, other symptoms of low biotin levels are rashes andbrittle nails.

Remember that biotin supplements may also causefalse lab resultsin heart problems and thyroid disease tests.Consult with your healthcare provider if you decide to take biotin.

Ironis essential in cells that rapidly divide, like hair follicles. Low levels of iron are associated with hair loss.

Adults need the following amounts of iron daily, according to the Food and Nutrition Board (FNB) at the Institute of Medicine (IOM) of the National Academies:

Taking iron supplements may help if your hair loss is due to an iron deficiency. However, there’s not enough evidence to prove that it helps promote hair growth when you don’t have an iron deficiency.

Interestingly, having either too littleseleniumor too much of it may cause hair loss.

Sources of selenium in the diet include the following:

The recommended dietary allowance of selenium for adults is:

Selenium also has been researched at a dose of 5 mcg/kg daily in infants with alopecia.

Hair loss is a common side effect of selenium toxicity (having too much in your body). So, it’s not recommended to supplement with selenium for hair loss if you have enough levels in your body.

Hair loss, oralopecia, affects almost half of all people over age 50.It can be reversible or permanent.Reversible hair losshappens when the hair cycle undergoes changes, but hair follicles are not destroyed.Permanent hair lossoccurs when scar tissue replaces hair follicles.

What Conditions Cause Hair Loss?

The following can cause hair loss:

What Medications Cause Hair Loss?Some medications can contribute to hair loss as well. These include the following:Blood pressure medicinesCholesterol medicines (statins)Seizure medicinesBlood thinnersAcid reflux medicinesAppropriate treatment of hair loss may differ depending on what’s causing it.

What Medications Cause Hair Loss?

Some medications can contribute to hair loss as well. These include the following:Blood pressure medicinesCholesterol medicines (statins)Seizure medicinesBlood thinnersAcid reflux medicinesAppropriate treatment of hair loss may differ depending on what’s causing it.

Some medications can contribute to hair loss as well. These include the following:

Appropriate treatment of hair loss may differ depending on what’s causing it.

What Treatments Are Available for Hair Loss?

The FDA has approved the following treatments for hair loss:

Hair transplantation, a type of surgery to restore hair, is also available.

Summary

If you are concerned about hair loss, a dermatologist can help you determine what’s causing your hair loss.

Many of the nutrients involved in the hair cycle are found in a healthy diet. Some people may be deficient in one, like iron, zinc, or biotin. If you have low levels of one of these vitamins or minerals, supplementing with that nutrient may help hair growth. But if you already have normal levels of these vitamins and minerals in your body, these supplements are unlikely to treat or prevent hair loss.

Keep in mind that taking supplements you don’t need could do more harm than good, causing unwanted side effects or even worsening hair loss.

Frequently Asked QuestionsSome supplementscontaining collagen,peptides,lipids, andhyaluronic acidhave shown effects in as little as eight weeks of treatment.Ideally, head-to-head clinical trials are needed to compare several supplements.Supplements like vitamins and minerals are most likely to benefit hair growth if your hair loss is due to a low level of nutrients.While there are case reports and anecdotes about the benefits of these supplements, there isn’t enough solid evidence to routinely recommend them.The Mediterranean diet may benefit hair growth.Low in meats and dairy products but high in fruits, veggies, nuts, and fish, this diet has been associated with a lower rate of hair loss. More clinical trials are needed to confirm this.

Some supplementscontaining collagen,peptides,lipids, andhyaluronic acidhave shown effects in as little as eight weeks of treatment.Ideally, head-to-head clinical trials are needed to compare several supplements.

Supplements like vitamins and minerals are most likely to benefit hair growth if your hair loss is due to a low level of nutrients.While there are case reports and anecdotes about the benefits of these supplements, there isn’t enough solid evidence to routinely recommend them.

Supplements like vitamins and minerals are most likely to benefit hair growth if your hair loss is due to a low level of nutrients.

While there are case reports and anecdotes about the benefits of these supplements, there isn’t enough solid evidence to routinely recommend them.

The Mediterranean diet may benefit hair growth.Low in meats and dairy products but high in fruits, veggies, nuts, and fish, this diet has been associated with a lower rate of hair loss. More clinical trials are needed to confirm this.

The Mediterranean diet may benefit hair growth.

Low in meats and dairy products but high in fruits, veggies, nuts, and fish, this diet has been associated with a lower rate of hair loss. More clinical trials are needed to confirm this.

24 SourcesVerywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.Drake L, Reyes-Hadsall S, Martinez J, Heinrich C, Huang K, Mostaghimi A.Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review.JAMA Dermatol.2023;159(1):79–86. doi:10.1001/jamadermatol.2022.4867Gokce N, Basgoz N, Kenanoglu S, et al.An overview of the genetic aspects of hair loss and its connection with nutrition.J Prev Med Hyg. 2022;63(2 Suppl 3):E228-E238. doi:10.15167/2421-4248/jpmh2022.63.2S3.2765Arias EM, Floriach N, Moreno-Arias G, Camps A, Arias S, Trüeb RM.Targeted Nutritional Supplementation for Telogen Effluvium: Multicenter Study on Efficacy of a Hydrolyzed Collagen, Vitamin-, and Mineral-Based Induction and Maintenance Treatment.Int J Trichology. 2022;14(2):49-54. doi:10.4103/ijt.ijt_57_21Lonnie M, Hooker E, Brunstrom JM, et al.Protein for life: Review of optimal protein intake, sustainable dietary sources and the effect on appetite in ageing adults.Nutrients. 2018;10(3):360. doi:10.3390/nu10030360Trüeb RM.“Let food be thy medicine”: Value of nutritional treatment for hair loss.Int J Trichology. 2021;13(6):1-3. doi:10.4103/ijt.ijt_124_20Rizer RL, Stephens TJ, Herndon JH, et al.A marine protein-based dietary supplement for subclinical hair thinning/loss: Results of a multisite, double-blind, placebo-controlled clinical trial.Int J Trichology. 2015;7(4):156-166. doi:10.4103/0974-7753.171573Rustad AM, Nickles MA, McKenney JE, et al.Myths and media in oral collagen supplementation for the skin, nails, and hair: A review.J Cosmet Dermatol. 2022;21(2):438-443. doi:10.1111/jocd.14567Hwang SB, Park HJ, Lee BH.Hair-growth-promoting effects of the fish collagen peptide in human dermal papilla cells and C57BL/6 mice modulating Wnt/β-catenin and BMP signaling pathways.Int J Mol Sci. 2022;23(19):11904. doi:10.3390/ijms231911904Yagoda MD MR, Gans PhD EH.A nutritional supplement formulated with peptides, lipids, collagen and hyaluronic acid optimizes key aspects of physical appearance in nails, hair and skin.Journal of Nutrition & Food Sciences. 2012;s5. doi:10.4172/2155-9600.s5-002Guo EL, Katta R.Diet and hair loss: Effects of nutrient deficiency and supplement use.Dermatol Pract Concept. 2017;7(1):1-10. doi:10.5826/dpc.0701a01Le Floc’h C, Cheniti A, Connétable S, Piccardi N, Vincenzi C, Tosti A.Effect of a nutritional supplement on hair loss in women.J Cosmet Dermatol. 2015;14(1):76-82. doi:10.1111/jocd.12127Kil MS, Kim CW, Kim SS.Analysis of serum zinc and copper concentrations in hair loss.Ann Dermatol. 2013;25(4):405-409. doi:10.5021/ad.2013.25.4.405National Institutes of Health.Zinc.Mukhopadhyay A, Reynolds HR, Phillips LM, et al.Cluster-randomized trial comparing ambulatory decision support tools to improve heart failure care.J Am Coll Cardiol. 2023;81(14):1303-1316. doi:10.1016/j.jacc.2023.02.005Boccaletti V, Zendri E, Giordano G, Gnetti L, De Panfilis G.Familial Uncombable Hair Syndrome: Ultrastructural Hair Study and Response to Biotin.Pediatr Dermatol. 2007;24(3):E14-E16. doi:10.1111/j.1525-1470.2007.00385.xNational Institutes of Health.Biotin.Adelman MJ, Bedford LM, Potts GA.Clinical efficacy of popular oral hair growth supplement ingredients.Int J Dermatol. 2021;60(10):1199-1210. doi:10.1111/ijd.15344National Institutes of Health.Iron.National Institutes of Health.Selenium.Petru E, Petru C, Benedicic Ch.Re: “Selenium as an element in the treatment of ovarian cancer in women receiving chemotherapy”.Gynecol Oncol. 2005;96(2):559-560. doi:10.1016/j.ygyno.2004.09.060Masumoto K, Nagata K, Higashi M, et al.Clinical features of selenium deficiency in infants receiving long-term nutritional support.Nutrition. 2007;23(11-12):782-787. doi:10.1016/j.nut.2007.08.001Peyravian N, Deo S, Daunert S, Jimenez JJ.The Inflammatory Aspect of Male and Female Pattern Hair Loss.J Inflamm Res. 2020;13:879-881. Published 2020 Nov 10. doi:10.2147/JIR.S275785Chaikittisilpa S, Rattanasirisin N, Panchaprateep R, et al.Prevalence of female pattern hair loss in postmenopausal women: a cross-sectional study.Menopause. 2022;29(4):415-420. doi:10.1097/GME.0000000000001927Nestor MS, Ablon G, Gade A, Han H, Fischer DL.Treatment options for androgenetic alopecia: Efficacy, side effects, compliance, financial considerations, and ethics.J Cosmet Dermatol. 2021;20(12):3759-3781. doi:10.1111/jocd.14537

24 Sources

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.Drake L, Reyes-Hadsall S, Martinez J, Heinrich C, Huang K, Mostaghimi A.Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review.JAMA Dermatol.2023;159(1):79–86. doi:10.1001/jamadermatol.2022.4867Gokce N, Basgoz N, Kenanoglu S, et al.An overview of the genetic aspects of hair loss and its connection with nutrition.J Prev Med Hyg. 2022;63(2 Suppl 3):E228-E238. doi:10.15167/2421-4248/jpmh2022.63.2S3.2765Arias EM, Floriach N, Moreno-Arias G, Camps A, Arias S, Trüeb RM.Targeted Nutritional Supplementation for Telogen Effluvium: Multicenter Study on Efficacy of a Hydrolyzed Collagen, Vitamin-, and Mineral-Based Induction and Maintenance Treatment.Int J Trichology. 2022;14(2):49-54. doi:10.4103/ijt.ijt_57_21Lonnie M, Hooker E, Brunstrom JM, et al.Protein for life: Review of optimal protein intake, sustainable dietary sources and the effect on appetite in ageing adults.Nutrients. 2018;10(3):360. doi:10.3390/nu10030360Trüeb RM.“Let food be thy medicine”: Value of nutritional treatment for hair loss.Int J Trichology. 2021;13(6):1-3. doi:10.4103/ijt.ijt_124_20Rizer RL, Stephens TJ, Herndon JH, et al.A marine protein-based dietary supplement for subclinical hair thinning/loss: Results of a multisite, double-blind, placebo-controlled clinical trial.Int J Trichology. 2015;7(4):156-166. doi:10.4103/0974-7753.171573Rustad AM, Nickles MA, McKenney JE, et al.Myths and media in oral collagen supplementation for the skin, nails, and hair: A review.J Cosmet Dermatol. 2022;21(2):438-443. doi:10.1111/jocd.14567Hwang SB, Park HJ, Lee BH.Hair-growth-promoting effects of the fish collagen peptide in human dermal papilla cells and C57BL/6 mice modulating Wnt/β-catenin and BMP signaling pathways.Int J Mol Sci. 2022;23(19):11904. doi:10.3390/ijms231911904Yagoda MD MR, Gans PhD EH.A nutritional supplement formulated with peptides, lipids, collagen and hyaluronic acid optimizes key aspects of physical appearance in nails, hair and skin.Journal of Nutrition & Food Sciences. 2012;s5. doi:10.4172/2155-9600.s5-002Guo EL, Katta R.Diet and hair loss: Effects of nutrient deficiency and supplement use.Dermatol Pract Concept. 2017;7(1):1-10. doi:10.5826/dpc.0701a01Le Floc’h C, Cheniti A, Connétable S, Piccardi N, Vincenzi C, Tosti A.Effect of a nutritional supplement on hair loss in women.J Cosmet Dermatol. 2015;14(1):76-82. doi:10.1111/jocd.12127Kil MS, Kim CW, Kim SS.Analysis of serum zinc and copper concentrations in hair loss.Ann Dermatol. 2013;25(4):405-409. doi:10.5021/ad.2013.25.4.405National Institutes of Health.Zinc.Mukhopadhyay A, Reynolds HR, Phillips LM, et al.Cluster-randomized trial comparing ambulatory decision support tools to improve heart failure care.J Am Coll Cardiol. 2023;81(14):1303-1316. doi:10.1016/j.jacc.2023.02.005Boccaletti V, Zendri E, Giordano G, Gnetti L, De Panfilis G.Familial Uncombable Hair Syndrome: Ultrastructural Hair Study and Response to Biotin.Pediatr Dermatol. 2007;24(3):E14-E16. doi:10.1111/j.1525-1470.2007.00385.xNational Institutes of Health.Biotin.Adelman MJ, Bedford LM, Potts GA.Clinical efficacy of popular oral hair growth supplement ingredients.Int J Dermatol. 2021;60(10):1199-1210. doi:10.1111/ijd.15344National Institutes of Health.Iron.National Institutes of Health.Selenium.Petru E, Petru C, Benedicic Ch.Re: “Selenium as an element in the treatment of ovarian cancer in women receiving chemotherapy”.Gynecol Oncol. 2005;96(2):559-560. doi:10.1016/j.ygyno.2004.09.060Masumoto K, Nagata K, Higashi M, et al.Clinical features of selenium deficiency in infants receiving long-term nutritional support.Nutrition. 2007;23(11-12):782-787. doi:10.1016/j.nut.2007.08.001Peyravian N, Deo S, Daunert S, Jimenez JJ.The Inflammatory Aspect of Male and Female Pattern Hair Loss.J Inflamm Res. 2020;13:879-881. Published 2020 Nov 10. doi:10.2147/JIR.S275785Chaikittisilpa S, Rattanasirisin N, Panchaprateep R, et al.Prevalence of female pattern hair loss in postmenopausal women: a cross-sectional study.Menopause. 2022;29(4):415-420. doi:10.1097/GME.0000000000001927Nestor MS, Ablon G, Gade A, Han H, Fischer DL.Treatment options for androgenetic alopecia: Efficacy, side effects, compliance, financial considerations, and ethics.J Cosmet Dermatol. 2021;20(12):3759-3781. doi:10.1111/jocd.14537

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Drake L, Reyes-Hadsall S, Martinez J, Heinrich C, Huang K, Mostaghimi A.Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review.JAMA Dermatol.2023;159(1):79–86. doi:10.1001/jamadermatol.2022.4867Gokce N, Basgoz N, Kenanoglu S, et al.An overview of the genetic aspects of hair loss and its connection with nutrition.J Prev Med Hyg. 2022;63(2 Suppl 3):E228-E238. doi:10.15167/2421-4248/jpmh2022.63.2S3.2765Arias EM, Floriach N, Moreno-Arias G, Camps A, Arias S, Trüeb RM.Targeted Nutritional Supplementation for Telogen Effluvium: Multicenter Study on Efficacy of a Hydrolyzed Collagen, Vitamin-, and Mineral-Based Induction and Maintenance Treatment.Int J Trichology. 2022;14(2):49-54. doi:10.4103/ijt.ijt_57_21Lonnie M, Hooker E, Brunstrom JM, et al.Protein for life: Review of optimal protein intake, sustainable dietary sources and the effect on appetite in ageing adults.Nutrients. 2018;10(3):360. doi:10.3390/nu10030360Trüeb RM.“Let food be thy medicine”: Value of nutritional treatment for hair loss.Int J Trichology. 2021;13(6):1-3. doi:10.4103/ijt.ijt_124_20Rizer RL, Stephens TJ, Herndon JH, et al.A marine protein-based dietary supplement for subclinical hair thinning/loss: Results of a multisite, double-blind, placebo-controlled clinical trial.Int J Trichology. 2015;7(4):156-166. doi:10.4103/0974-7753.171573Rustad AM, Nickles MA, McKenney JE, et al.Myths and media in oral collagen supplementation for the skin, nails, and hair: A review.J Cosmet Dermatol. 2022;21(2):438-443. doi:10.1111/jocd.14567Hwang SB, Park HJ, Lee BH.Hair-growth-promoting effects of the fish collagen peptide in human dermal papilla cells and C57BL/6 mice modulating Wnt/β-catenin and BMP signaling pathways.Int J Mol Sci. 2022;23(19):11904. doi:10.3390/ijms231911904Yagoda MD MR, Gans PhD EH.A nutritional supplement formulated with peptides, lipids, collagen and hyaluronic acid optimizes key aspects of physical appearance in nails, hair and skin.Journal of Nutrition & Food Sciences. 2012;s5. doi:10.4172/2155-9600.s5-002Guo EL, Katta R.Diet and hair loss: Effects of nutrient deficiency and supplement use.Dermatol Pract Concept. 2017;7(1):1-10. doi:10.5826/dpc.0701a01Le Floc’h C, Cheniti A, Connétable S, Piccardi N, Vincenzi C, Tosti A.Effect of a nutritional supplement on hair loss in women.J Cosmet Dermatol. 2015;14(1):76-82. doi:10.1111/jocd.12127Kil MS, Kim CW, Kim SS.Analysis of serum zinc and copper concentrations in hair loss.Ann Dermatol. 2013;25(4):405-409. doi:10.5021/ad.2013.25.4.405National Institutes of Health.Zinc.Mukhopadhyay A, Reynolds HR, Phillips LM, et al.Cluster-randomized trial comparing ambulatory decision support tools to improve heart failure care.J Am Coll Cardiol. 2023;81(14):1303-1316. doi:10.1016/j.jacc.2023.02.005Boccaletti V, Zendri E, Giordano G, Gnetti L, De Panfilis G.Familial Uncombable Hair Syndrome: Ultrastructural Hair Study and Response to Biotin.Pediatr Dermatol. 2007;24(3):E14-E16. doi:10.1111/j.1525-1470.2007.00385.xNational Institutes of Health.Biotin.Adelman MJ, Bedford LM, Potts GA.Clinical efficacy of popular oral hair growth supplement ingredients.Int J Dermatol. 2021;60(10):1199-1210. doi:10.1111/ijd.15344National Institutes of Health.Iron.National Institutes of Health.Selenium.Petru E, Petru C, Benedicic Ch.Re: “Selenium as an element in the treatment of ovarian cancer in women receiving chemotherapy”.Gynecol Oncol. 2005;96(2):559-560. doi:10.1016/j.ygyno.2004.09.060Masumoto K, Nagata K, Higashi M, et al.Clinical features of selenium deficiency in infants receiving long-term nutritional support.Nutrition. 2007;23(11-12):782-787. doi:10.1016/j.nut.2007.08.001Peyravian N, Deo S, Daunert S, Jimenez JJ.The Inflammatory Aspect of Male and Female Pattern Hair Loss.J Inflamm Res. 2020;13:879-881. Published 2020 Nov 10. doi:10.2147/JIR.S275785Chaikittisilpa S, Rattanasirisin N, Panchaprateep R, et al.Prevalence of female pattern hair loss in postmenopausal women: a cross-sectional study.Menopause. 2022;29(4):415-420. doi:10.1097/GME.0000000000001927Nestor MS, Ablon G, Gade A, Han H, Fischer DL.Treatment options for androgenetic alopecia: Efficacy, side effects, compliance, financial considerations, and ethics.J Cosmet Dermatol. 2021;20(12):3759-3781. doi:10.1111/jocd.14537

Drake L, Reyes-Hadsall S, Martinez J, Heinrich C, Huang K, Mostaghimi A.Evaluation of the Safety and Effectiveness of Nutritional Supplements for Treating Hair Loss: A Systematic Review.JAMA Dermatol.2023;159(1):79–86. doi:10.1001/jamadermatol.2022.4867

Gokce N, Basgoz N, Kenanoglu S, et al.An overview of the genetic aspects of hair loss and its connection with nutrition.J Prev Med Hyg. 2022;63(2 Suppl 3):E228-E238. doi:10.15167/2421-4248/jpmh2022.63.2S3.2765

Arias EM, Floriach N, Moreno-Arias G, Camps A, Arias S, Trüeb RM.Targeted Nutritional Supplementation for Telogen Effluvium: Multicenter Study on Efficacy of a Hydrolyzed Collagen, Vitamin-, and Mineral-Based Induction and Maintenance Treatment.Int J Trichology. 2022;14(2):49-54. doi:10.4103/ijt.ijt_57_21

Lonnie M, Hooker E, Brunstrom JM, et al.Protein for life: Review of optimal protein intake, sustainable dietary sources and the effect on appetite in ageing adults.Nutrients. 2018;10(3):360. doi:10.3390/nu10030360

Trüeb RM.“Let food be thy medicine”: Value of nutritional treatment for hair loss.Int J Trichology. 2021;13(6):1-3. doi:10.4103/ijt.ijt_124_20

Rizer RL, Stephens TJ, Herndon JH, et al.A marine protein-based dietary supplement for subclinical hair thinning/loss: Results of a multisite, double-blind, placebo-controlled clinical trial.Int J Trichology. 2015;7(4):156-166. doi:10.4103/0974-7753.171573

Rustad AM, Nickles MA, McKenney JE, et al.Myths and media in oral collagen supplementation for the skin, nails, and hair: A review.J Cosmet Dermatol. 2022;21(2):438-443. doi:10.1111/jocd.14567

Hwang SB, Park HJ, Lee BH.Hair-growth-promoting effects of the fish collagen peptide in human dermal papilla cells and C57BL/6 mice modulating Wnt/β-catenin and BMP signaling pathways.Int J Mol Sci. 2022;23(19):11904. doi:10.3390/ijms231911904

Yagoda MD MR, Gans PhD EH.A nutritional supplement formulated with peptides, lipids, collagen and hyaluronic acid optimizes key aspects of physical appearance in nails, hair and skin.Journal of Nutrition & Food Sciences. 2012;s5. doi:10.4172/2155-9600.s5-002

Guo EL, Katta R.Diet and hair loss: Effects of nutrient deficiency and supplement use.Dermatol Pract Concept. 2017;7(1):1-10. doi:10.5826/dpc.0701a01

Le Floc’h C, Cheniti A, Connétable S, Piccardi N, Vincenzi C, Tosti A.Effect of a nutritional supplement on hair loss in women.J Cosmet Dermatol. 2015;14(1):76-82. doi:10.1111/jocd.12127

Kil MS, Kim CW, Kim SS.Analysis of serum zinc and copper concentrations in hair loss.Ann Dermatol. 2013;25(4):405-409. doi:10.5021/ad.2013.25.4.405

National Institutes of Health.Zinc.

Mukhopadhyay A, Reynolds HR, Phillips LM, et al.Cluster-randomized trial comparing ambulatory decision support tools to improve heart failure care.J Am Coll Cardiol. 2023;81(14):1303-1316. doi:10.1016/j.jacc.2023.02.005

Boccaletti V, Zendri E, Giordano G, Gnetti L, De Panfilis G.Familial Uncombable Hair Syndrome: Ultrastructural Hair Study and Response to Biotin.Pediatr Dermatol. 2007;24(3):E14-E16. doi:10.1111/j.1525-1470.2007.00385.x

National Institutes of Health.Biotin.

Adelman MJ, Bedford LM, Potts GA.Clinical efficacy of popular oral hair growth supplement ingredients.Int J Dermatol. 2021;60(10):1199-1210. doi:10.1111/ijd.15344

National Institutes of Health.Iron.

National Institutes of Health.Selenium.

Petru E, Petru C, Benedicic Ch.Re: “Selenium as an element in the treatment of ovarian cancer in women receiving chemotherapy”.Gynecol Oncol. 2005;96(2):559-560. doi:10.1016/j.ygyno.2004.09.060

Masumoto K, Nagata K, Higashi M, et al.Clinical features of selenium deficiency in infants receiving long-term nutritional support.Nutrition. 2007;23(11-12):782-787. doi:10.1016/j.nut.2007.08.001

Peyravian N, Deo S, Daunert S, Jimenez JJ.The Inflammatory Aspect of Male and Female Pattern Hair Loss.J Inflamm Res. 2020;13:879-881. Published 2020 Nov 10. doi:10.2147/JIR.S275785

Chaikittisilpa S, Rattanasirisin N, Panchaprateep R, et al.Prevalence of female pattern hair loss in postmenopausal women: a cross-sectional study.Menopause. 2022;29(4):415-420. doi:10.1097/GME.0000000000001927

Nestor MS, Ablon G, Gade A, Han H, Fischer DL.Treatment options for androgenetic alopecia: Efficacy, side effects, compliance, financial considerations, and ethics.J Cosmet Dermatol. 2021;20(12):3759-3781. doi:10.1111/jocd.14537

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