What Supplements Speed Up Hair Growth?

WrittenbyLuat Duong
Last updated

Hair growth is a complex process that is influenced by a variety of factors, including genetics, age, hormones, and nutrient deficiencies. While there is no magic pill or supplement that can guarantee rapid hair growth, certain vitamins, minerals, and other nutrients have been shown to support healthy hair growth and potentially speed up the process.

What supplements speed up hair growth?

Several supplements have been identified as potentially beneficial for promoting faster hair growth. These include:

  • Biotin (Vitamin B7)
  • Vitamin C
  • Vitamin D
  • Iron
  • Zinc
  • Protein supplements
  • Omega-3 fatty acids

Biotin (Vitamin B7)

Biotin, also known as vitamin B7, is often touted as the "hair growth vitamin." It plays a crucial role in the production of keratin, a protein that makes up the structural components of hair. Biotin deficiency has been linked to hair loss, while supplementation may help to promote stronger, healthier hair growth.

Vitamin C

Vitamin C is an antioxidant that helps to protect hair follicles from oxidative stress, which can lead to hair loss and stunted growth. It also plays a role in the production of collagen, a protein that is essential for healthy hair growth.

Vitamin D

Vitamin D is believed to help regulate the hair growth cycle and stimulate the growth of new hair follicles. A deficiency in vitamin D has been associated with hair loss and thinning hair.


Iron is essential for the production of hair cell protein and the delivery of oxygen to hair follicles. An iron deficiency can lead to hair loss and slowed hair growth.


Zinc plays a role in hair tissue growth and repair, as well as the proper functioning of the oil glands around the hair follicles. A zinc deficiency can contribute to hair loss and stunted hair growth.

Protein supplements

Hair is primarily composed of protein, so ensuring adequate protein intake is crucial for healthy hair growth. Protein supplements, such as whey or pea protein powders, can help to ensure you're getting enough of this essential nutrient.

Omega-3 fatty acids

Omega-3 fatty acids, found in foods like fatty fish, walnuts, and flaxseeds, have anti-inflammatory properties that can help to promote healthy hair growth. They may also improve blood circulation, which can deliver more nutrients to the hair follicles.

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How effective are these supplements for hair growth?

While these supplements may support hair growth, it's important to note that their effectiveness can vary from person to person, and they are not a guaranteed solution for hair loss or thinning hair. Here's what the research says about their potential benefits:


Several studies have suggested that biotin supplementation may help to improve hair growth and reduce hair shedding. However, most of these studies were small and had limitations, so more research is needed to confirm the extent of biotin's benefits for hair growth.

Vitamin C

While vitamin C is essential for overall hair health, there is limited evidence directly linking vitamin C supplementation to increased hair growth. However, its antioxidant properties and role in collagen production may indirectly support healthy hair growth.

Vitamin D

Some research has suggested that vitamin D supplementation may help to promote hair growth in individuals with a deficiency. However, more studies are needed to determine the optimal dosage and potential benefits for those with adequate vitamin D levels.

Iron and zinc

Correcting deficiencies in iron and zinc has been shown to improve hair growth and reduce hair loss in some cases. However, it's important not to take excessive amounts of these minerals, as they can cause adverse effects.

Protein and omega-3 fatty acids

While protein and omega-3 fatty acids are essential for overall hair health, there is limited research specifically examining their effects on hair growth when taken as supplements.

Other factors affecting hair growth

It's important to note that hair growth is influenced by a variety of factors beyond just nutrient intake. These include:

  • Genetics: Your genetic makeup plays a significant role in the rate and pattern of your hair growth.
  • Age: Hair growth tends to slow down as we get older due to hormonal changes and a gradual decrease in the number of actively growing hair follicles.
  • Hormones: Fluctuations in hormones, such as during pregnancy, menopause, or certain medical conditions, can affect hair growth.
  • Stress: Chronic stress can disrupt the hair growth cycle and lead to increased shedding or thinning hair.
  • Medications: Certain medications, such as those used for cancer treatment, can cause hair loss or slowed hair growth.

Tips for promoting healthy hair growth

In addition to considering supplements, there are several lifestyle habits that can help to promote healthy hair growth:

  • Eat a balanced diet: Ensure you're getting a variety of nutrients from whole foods, such as fruits, vegetables, lean proteins, and healthy fats.
  • Manage stress: Practice stress-management techniques like meditation, yoga, or deep breathing exercises.
  • Get enough sleep: Adequate sleep is essential for overall health and can help to regulate hormone levels that affect hair growth.
  • Avoid harsh hair treatments: Excessive heat styling, chemical treatments, and tight hairstyles can damage hair follicles and impede hair growth.
  • Stay hydrated: Drinking plenty of water can help to keep your hair follicles healthy and promote hair growth.

If you're experiencing significant hair loss or thinning hair, it's always best to consult with a healthcare professional or dermatologist to identify and address any underlying medical conditions or nutrient deficiencies.

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Luat Duong

Luat Duong is a Copenhagen-based writer and content strategist specializing in hair loss and health. His work has been featured in MyHealthGuide, The Right Hairstyles, and Woman's Era. He is a graduate of Vaasa University. You can connect with him on LinkedIn.