More than just a beauty feature
Nails are not only a part of our external appearance, but also provide information about our general state of health .
Brittle, splintering, or slow-growing nails may indicate nutritional gaps or weaker connective tissue structure .
One nutrient that is increasingly being scientifically studied is collagen .
Why nail health declines
Our nails consist mainly of keratin , a solid structural protein.
Healthy surrounding tissue and sufficient supporting nutrients – including collagen – are important for its formation.
As we age, the body's own collagen production decreases, which can affect moisture and cell renewal in the nail bed.
Other factors for weak nails include:
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Nutrient deficiency (e.g. protein, biotin, zinc)
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Frequent hand washing or contact with aggressive cleaners
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Hormonal changes
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Circulatory disorders
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Permanent strain or stress
Research on collagen and nails
Initial studies provide promising evidence that hydrolyzed collagen peptides can support nail structure and growth .
In a study (Journal of Cosmetic Dermatology, 2017), participants reported after 24 weeks of taking 2.5 g of collagen peptides:
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Less nail breakage
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Improved nail quality and more even growth
These data suggest that collagen can support not only skin and connective tissue, but also the strength of nails – without, however, guaranteeing a medical effect.
How collagen supports nail structure
Collagen provides amino acids such as glycine , proline and hydroxyproline , which are important for the formation of keratin and the stability of the surrounding tissue .
By promoting moisture and cell renewal in the nail bed, collagen can help:
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to make the nails appear thicker and smoother
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Reduce chipping and cracking
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to promote uniform growth
Why marine collagen is a good choice
Fish collagen (marine collagen) contains a lot of type I collagen , which is also found in skin, hair and nails.
Thanks to its small molecular size, it is particularly bioavailable and is easily absorbed by the body.
Ballstad salmon collagen comes from sustainable fisheries , is tasteless and odorless – ideal for daily use in drinks such as smoothies or coffee.
Tips for daily use
For noticeable support of the nail structure, specialist sources recommend:
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2.5–10 g of hydrolyzed collagen peptides per day
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Combination with vitamin C (promotes the body's own collagen production)
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Biotin and zinc for keratin and skin health
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Adequate protein intake and hydration
Results are usually visible after 8-12 weeks of regular use.
Conclusion
Collagen can be a useful component of a balanced diet to support the structure and strength of nails .
Marine collagen, in particular, scores highly due to its high bioavailability and can be easily integrated into everyday life – for well-groomed nails from the inside out.
Sources
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Hexsel D. et al. (2017): Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails - Journal of Cosmetic Dermatology
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EFSA Journal: Evaluation of collagen hydrolysate and its role in nutrition
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BfR (Federal Institute for Risk Assessment): Information on food supplements containing collagen
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Regulation (EC) No. 1924/2006 on nutrition and health claims made on foods
