Hair & Nails

Thinning Hair After 40: How Collagen Can Help

By Mark Edward  ·  June 1, 2026  ·  5 min read

Cross-section of a hair follicle anchored in collagen-rich scalp dermis

Somewhere after 40, the part in your hair gets a little wider. The ponytail feels thinner. More strands than usual show up in the shower drain. It is one of the most common complaints in the second half of life — and most people blame their shampoo.

The real story starts one layer down, in the skin of your scalp.

If you are looking at collagen for thinning hair, here is the honest breakdown: what collagen does for the follicle, why thinning hair after 40 tracks so closely with collagen loss, and where supplements help versus where they don't.

Your Hair Grows Out of Collagen

A hair follicle is not floating on its own. It is anchored deep in the dermis — the thick, collagen-rich layer of skin — and wrapped in a connective-tissue sheath made largely of Type I and Type III collagen.

That sheath does real work. It holds the follicle in place, carries the blood supply that feeds it, and surrounds the dermal papilla, the cluster of cells at the base of every follicle that actually signals hair to grow.

When the collagen around the follicle is strong, the follicle has a stable foundation. When it thins, the follicle loses structural support and the growth signal weakens.

Why It Speeds Up After 40

Your body's collagen production peaks in your twenties and then declines by roughly 1 to 1.5% every year. By your forties, the dermis is measurably thinner than it was at 25, and the connective-tissue scaffolding around each follicle goes with it.

For women, menopause accelerates the drop sharply — estrogen supports collagen, and when it falls, collagen can decline as much as 30% in the first few years after. For men, the slide is steadier but just as real.

The visible result is the same: follicles sitting in a thinner, less supportive dermal bed produce finer, more fragile strands. The hair doesn't vanish overnight. It miniaturizes — each new strand a little thinner than the last.

Encore Collagen Complex bottle

Encore Collagen Complex delivers 1,800mg of Types I, II, III, IV, and V — including the Type I and III collagen that anchors and feeds every hair follicle.

Order the Complex →

What Collagen Supplements Actually Do

Oral collagen does not pour straight into your scalp and rebuild hair. It works upstream.

Digested collagen breaks down into amino acids — proline, glycine, and hydroxyproline — plus small peptides that your body uses as raw material. Two things happen with a steady supply. Your fibroblasts get the building blocks to maintain the dermal collagen the follicle is anchored in, and the body has more of the amino acids that hair itself is built from.

There is also a protective angle. Research on collagen peptides has shown they can act as antioxidants for the dermal papilla cells — the growth-signaling cells — helping shield them from the oxidative stress that builds up with age.

None of that is a cure for genetic hair loss. But a follicle anchored in a healthy, well-supplied dermis is a follicle in a far better position to keep producing thick strands.

Which Types of Collagen Matter for Hair

Hair is a skin story, so the skin collagens lead. Type I is the bulk of the dermis and the connective sheath. Type III partners with it and dominates in younger, actively-rebuilding tissue — which is exactly the support that fades with age.

This is where single-source powders fall short. A marine-only or bovine-only collagen gives you some Type I and III, but a multi-type complex covers the full structural set the scalp uses. We broke down each one in Collagen and Hair: What the Research Says.

Encore Collagen Complex

Encore Collagen Complex is built on five sources and all five collagen types — 1,800mg per serving — so the Type I and III your follicles depend on come alongside the rest of the structural protein library your skin uses.

How to Use It for Hair

Consistency beats everything. 1,500–2,000mg of hydrolyzed collagen peptides a day, taken for at least 12 to 16 weeks before you judge results. Hair grows about half an inch a month, so this is a slow signal — not a two-week test.

Stack the cofactors. Vitamin C is required for collagen synthesis. Iron and adequate protein matter too — low iron is a quiet, common driver of thinning, especially in women, and no supplement overrides a deficiency.

And be realistic about the cause. If your thinning is clearly patterned, hereditary loss, collagen supports the scalp environment but won't replace targeted treatment. If it is the diffuse, all-over thinning of aging skin, collagen is squarely aimed at the root of it.

The Bottom Line

Thinning hair after 40 is usually a foundation problem — the collagen scaffolding under the scalp is breaking down faster than the body rebuilds it. Collagen supplements address that foundation by feeding the dermis and the follicle the material they are losing.

It is structural support, not a miracle. But for the slow, age-driven thinning most people are fighting, supporting the structure is exactly the right move. If you want the bigger picture, here is how much collagen you have lost by your age.

Keep Reading

Common Questions

Collagen and Thinning Hair

Can collagen regrow hair that has already fallen out?

No. Collagen does not reactivate a follicle that has fully miniaturized or scarred over, and it does not treat genetic (androgenetic) hair loss on its own. What collagen does is support the dermal environment the follicle sits in and supply the amino acids the body uses to build the hair shaft. It is structural support, not a regrowth drug.

How long does collagen take to affect hair?

Hair grows slowly, about half an inch a month, so plan on 12 to 16 weeks of daily collagen before you can fairly judge changes in thickness or breakage. The follicle responds to a sustained supply of building blocks, not a short trial.

Which collagen is best for thinning hair?

Type I and Type III collagen surround and anchor the hair follicle in the dermis, so those matter most. A multi-type complex covers both rather than the single source you get from marine-only or bovine-only powders. Pairing it with adequate protein, vitamin C, and iron gives the follicle the full set of inputs it needs.

Give Your Follicles a Foundation to Hold Onto

1,800mg of five-source collagen per serving. Third party tested. GMP certified. 90-day money-back guarantee.

Order the Collagen Complex →