Last updated July 2026 · 5 minute read
The short answer. Collagen supplies amino acids for the proteins in nails, and many women find daily hydrolysed collagen supports stronger, less brittle nails over a few months. Added nutrients such as zinc, which contributes to the maintenance of normal nails, help too.
Why nails weaken
Nails can become brittle with age, frequent water exposure, harsh products or simply as collagen and nutrient levels shift. For many women, weak, splitting nails are one of the first signs they notice.
How collagen may support nails
Collagen provides amino acids the body uses to build the keratin structure of nails. In a small study, daily collagen peptides were linked with faster nail growth and less breakage. As always, these are food supplements, so results are gradual and vary between people.
The nutrient angle
Zinc and selenium contribute to the maintenance of normal nails, so a collagen enriched with supporting vitamins and minerals gives your nails more to work with. Eternal Collagen includes 19 essential vitamins and minerals.
Eternal Collagen: 15,000mg in one daily cap
Hydrolysed marine collagen, enriched with 19 essential vitamins and minerals, in a tropical flavour that mixes easily into water, juice or a smoothie. One 25ml cap a day, made in the UK.
Tips for stronger nails
- Take your daily cap consistently for at least two to three months
- Wear gloves for washing up and cleaning
- Keep nails moisturised and avoid harsh removers
Frequently asked questions
Does collagen help nails?
Collagen provides amino acids for the proteins in nails, and many women find daily hydrolysed collagen supports stronger, less brittle nails over a few months.
How long does collagen take to work on nails?
Nails grow slowly, so look for changes over two to three months of consistent daily use.
What is the best collagen for nails?
A high strength hydrolysed marine collagen with supporting nutrients such as zinc, which contributes to the maintenance of normal nails.
Why are my nails so brittle?
Brittle nails can come from age, water and product exposure, or nutrient shifts. If they are severely or suddenly brittle, speak to your GP.