- Collagen is the main structural protein in your skin.
- Skin's collagen naturally declines with age.
- Sun exposure is one of the biggest accelerators.
- Daily SPF plus peptides is a simple, effective routine.
What collagen does
Collagen is a protein that forms a supportive network in the deeper layer of your skin. Together with elastin, it's what makes young skin look firm, smooth and bouncy.
Why skin loses it
From early adulthood, skin gradually makes less collagen, and the collagen it has becomes less organised. Over years this shows up as fine lines, less firmness and a change in how skin catches the light.
What speeds it up
- UV exposure is the big one, which is why daily SPF matters so much.
- Smoking and pollution.
- Poor sleep and chronic stress.
- Skipping moisturiser makes existing lines look deeper.
How to support the look of firm skin
- Wear broad-spectrum SPF every day. See sunscreen and anti-aging.
- Use peptides like GHK-Cu and palmitoyl tripeptide-5 twice a day.
- Keep skin hydrated.
- Be patient: firmness changes take weeks, not days.
FAQ
At what age does collagen start to decline?
Gradual decline is commonly described as starting in your mid-20s, becoming more noticeable over the following decades.
Can skincare replace lost collagen?
Skincare can't replace collagen directly, but ingredients like peptides are used to support the look of firmer skin over time.
Do collagen creams work?
Collagen on the skin mainly hydrates. See our guide to hydrolyzed collagen in skincare.
This article is for general information only and isn't medical advice. DOSE is a cosmetic product and is not intended to diagnose, treat, cure or prevent any disease. Individual results vary.