Skin & Beauty

Collagen for hair: does collagen help with hair growth?

from Mag. Margit Weichselbraun
on 06.10.2025

Healthy, radiant, strong. Everyone wants it: the dream mane. But not everyone is blessed with full, shiny hair. What's more, our hair is exposed to many external and internal influences every day that can really take their toll. These range from hormone fluctuations and poor nutrition to damaging styling or insufficient care. But there is said to be a miracle weapon out there that restores shine to tired, dull hair: collagen. What's the truth behind this? What can collagen do for your hair, its growth and its structure? And what should you look out for? We have summarised everything you need to know on the subject.

Collagen and its effect on hair: an overview of the benefits

  • Collagen promotes hair growth: Collagen starts at the base, namely in your skin. There, it stimulates the formation of new, healthy hair follicles, improves blood circulation and supplies hair roots with important nutrients. And that's exactly what you need to get your hair growing and sprouting again.
  • Collagen improves hair structure: Another protein that helps repair damaged hair and make it more resilient and stronger is keratin. Collagen provides your body with important building blocks for this, namely amino acids.
  • Collagen reduces hair loss: Strong hair and improved scalp health – these are the best conditions for counteracting hair loss. If you rely on collagen, you can also reduce hair loss and promote the regeneration of your hair follicles.
  • Collagen prevents grey hair: Collagen fights free radicals, which not only makes your hair more resistant, but can also slow down the breakdown of melanin as you age.

1, 2 or 3: Which type of collagen is most effective for hair?

Sounds interesting, right? But there's one thing you should know: not all collagen is the same – your body has a total of 28 different types! But don't worry, you don't need to know them all. The most important ones are collagen types 1, 2 and 3. And if you want to support your hair in particular, types 1 and 3 are the most relevant for you, as they target areas such as skin and hair, while type 2, for example, also contains substances that support the functionality of your cartilage and joints. However, since type 2 is also collagen, which therefore also provides the necessary amino acids, it would not be a bad choice in the end.

Which foods contain collagen for hair?

Let's now move on to the optimal diet, because in order to provide your body with an excellent supply of collagen, you need to eat the right foods. Collagen is mainly found in animal products such as:

  • Meat
  • Fish
  • Bone broth
  • Gelatin

Supplementing collagen for your hair: what you need to know

You can support your body with high-quality dietary supplements. Collagen should be taken over several weeks to months, with the first improvements in hair structure becoming visible after 2–4 weeks.

Choose a product that you can easily integrate into your daily routine, because when it comes to collagen, regularity is the key to success. You can choose between powders and drinks, as well as capsules and tablets. All collagen products are derived from animal sources. The reason: plants simply do not produce collagen, as they strengthen their structure in a different way. Vegan collagen alternatives are now also available. However, as collagen can only be produced by humans and animals, these are not ‘real’ collagen – rather, these supplements provide you with collagen building blocks that your body uses to produce its own collagen.

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Since vitamin C improves the absorption and effectiveness of collagen in the body, you should also keep an eye on your vitamin C levels. Vitamin C not only supports the enzymes necessary for collagen synthesis, but also protects your hair and scalp from free radicals. A combination of both vital substances can therefore be particularly effective.

Hair care products with collagen: useful or not?

Collagen is also added to many shampoos and other hair care products. So can hair be strengthened in this way? We say: yes and no. To date, there is no scientific evidence that collagen can stimulate hair growth when applied externally. However, your hair may benefit from its moisturising properties. Collagen retains moisture for a long time and also acts as a protective barrier. This makes your hair softer, shinier and less prone to frizz. Collagen also has antioxidant properties, which means that oxidative stress doesn't stand a chance

More tips for healthy hair

Conclusion:

When it comes to collagen, most people think of the skin, because collagen is known to improve skin structure and health. But this protein can do even more. Your hair will also benefit from an extra dose of this active ingredient. Make sure you choose the right type of collagen – types 1 and 3 are ideal. A little patience is also required, as the effects do not happen overnight – but perhaps from this month to the next. Keep at it!

Frequently asked questions about collagen for hair:

Yes, collagen can promote hair growth and improve hair structure. This is because collagen stimulates the formation of new, healthy hair follicles, boosts blood circulation and supplies hair roots with important nutrients. Strong hair and improved scalp health are also the best conditions for counteracting hair loss. In addition, collagen fights free radicals, which not only makes hair more resistant, but can also slow down the breakdown of melanin in old age to a certain extent.

Yes, collagen can reduce hair loss. This is because collagen supports hair growth, stimulates the formation of new, healthy hair follicles, optimises blood circulation and supplies hair roots with essential nutrients. It also improves the hair structure. All of these are the best conditions for curbing hair loss.

Initial improvements in hair structure are usually visible after 2–4 weeks. However, long-term use is recommended for lasting results.

If you want to strengthen your hair, you should focus on collagen types 1 and 3.

Both vital substances can be beneficial for hair. While collagen supports hair growth, improves hair structure and fights free radicals, biotin promotes cell regeneration.

Sources:

Rustad AM, Nickles MA, McKenney JE, Bilimoria SN, Lio PA. Myths and media in oral collagen supplementation for the skin, nails, and hair: A review. J Cosmet Dermatol. 2022 Feb;21(2):438-443. doi: 10.1111/jocd.14567. Epub 2021 Oct 25. PMID: 34694676. https://pubmed.ncbi.nlm.nih.gov/34694676/

Evidence Review: Natural Hair Supplements: Biotin and Collagen. Plast Aesthet Nurs (Phila). 2023 Jul-Sep 01;43(3):E5. doi: 10.1097/PSN.0000000000000519. PMID: 37389622. https://pubmed.ncbi.nlm.nih.gov/37389622/

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 Oct 7;23(19):11904. doi: 10.3390/ijms231911904. PMID: 36233206; PMCID: PMC9569759. https://pubmed.ncbi.nlm.nih.gov/36233206/

Cheng H, Liu F, Zhou M, Chen S, Huang H, Liu Y, Zhao X, Zhang Q, Zhou X, Li Z, Cai H. Enhancement of hair growth through stimulation of hair follicle stem cells by prostaglandin E2 collagen matrix. Exp Cell Res. 2022 Dec 15;421(2):113411. doi: 10.1016/j.yexcr.2022.113411. Epub 2022 Nov 6. PMID: 36351501. https://pubmed.ncbi.nlm.nih.gov/36351501/

Warma S, Warma H, Merja A, Patel N, Patel M. Revitalizing skin, hair, nails, and muscles: Unlocking beauty and wellness with vegan collagen. J Cosmet Dermatol. 2024 Nov;23(11):3740-3756. doi: 10.1111/jocd.16443. Epub 2024 Jul 11. PMID: 38989962. https://pubmed.ncbi.nlm.nih.gov/38989962/

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