Collagen and peptides for skin: what users report
Users’ own accounts, not research. The accounts are self-selected and do not prove that anything works.
This page does not list users’ doses, sellers or shops. Amounts used in trials, with sources: Collagen peptides: amounts used in studies.
In short
- The data are 785 Reddit posts and comments, each one read (1/2024 to 10/2026). 361 people (389 accounts) described products used without needles.
- 254/361 (70%) reported some benefit, 74/361 (20%) some harm, and 39/334 (12%) of those who stated an outcome noticed no effect.
- 229 people took collagen by mouth. Most common benefits: hair or lashes, joints or recovery and nails. Of them, 20 mentioned more hydrated skin and 11 firmer skin (of all 361 writers, 32 mentioned more hydrated skin and 19 firmer skin).
- Of copper-peptide cream or serum users (35), 21/35 (60%) reported a benefit and 13/35 (37%) a harm; the most common harm: skin looser or new fine lines.
- The accounts cannot separate the product’s effect from placebo, other skincare or the passing of time.
By product
| Product | People | Reported a benefit | Noticed no effect (share of those who reported an outcome) | Reported a harm |
|---|---|---|---|---|
| Collagen by mouth | 229 | 172 (75%) | 29 (13%) | 25 (11%) |
| Copper peptide (GHK-Cu) cream or serum | 35 | 21 (60%) | 1 (3%) | 13 (37%) |
| Other peptide cream or serum (e.g. Matrixyl, Argireline) | 49 | 28 (57%) | 5 (11%) | 17 (35%) |
| Microneedling (home or clinic) | 61 | 40 (66%) | 5 (10%) | 21 (34%) |
| Injected GHK-Cu (not in the shares) | 39 | 11 (28%) | 2 (10%) | 34 (87%) |
| GHK-Cu, route unknown (not in the shares) | 16 | 9 (56%) | 1 (8%) | 9 (56%) |
One person can be in several rows. "Noticed no effect" is a share of those who stated an outcome. "-" = fewer than 5 people, no shares. 1 person used microneedling with a peptide or copper-peptide serum.
Most common benefits
254 of 361 (70%) mentioned some benefit.
| People | Share of all | |
|---|---|---|
| Hair or lashes | 69 | 19% |
| Skin looks better in general | 64 | 18% |
| Joints or recovery | 63 | 17% |
| Nails | 55 | 15% |
| More hydrated or plumper skin | 32 | 9% |
| Smoother surface or smaller pores | 29 | 8% |
| Fewer fine lines or wrinkles | 28 | 8% |
| Glow or more even tone | 27 | 7% |
| More elastic or firmer skin | 19 | 5% |
| Scars or marks faded | 14 | 4% |
| Calmer skin or less redness | 4 | 1% |
| Other (e.g. sleep, stomach) | 20 | 6% |
Most common harms and complaints
74 of 361 (20%) mentioned some harm; 24 mentioned both a benefit and a harm.
| People | Share of all | |
|---|---|---|
| Irritation, stinging or redness | 20 | 6% |
| Bumps or breakouts | 18 | 5% |
| Skin looser or new fine lines | 9 | 2% |
| Dryness or flaking | 5 | 1% |
| Pigment changes | 5 | 1% |
| Stomach upset | 4 | 1% |
| Allergic reaction or itching | 3 | 1% |
| Other (e.g. tiredness, mood, hair growth) | 25 | 7% |
Harms reported in research: Harms and safety. Side effects in general.
Expectations and disappointments
334 people stated an outcome. 16 said outright they were disappointed or called the product a waste of money.
| Expectations and disappointments | People | Share of those stating |
|---|---|---|
| Benefit | 186 | 56% |
| Partly (e.g. only hair or joints, or the effect faded) | 63 | 19% |
| No effect | 39 | 12% |
| Worse | 26 | 8% |
| Cannot tell | 20 | 6% |
When the change was noticed
82 people who reported a benefit said when. The distribution does not show when an effect starts, because a quick change can be placebo; in trials the change in elasticity needed at least 12 weeks (research evidence).
| When the change was noticed | People | Share of those stating |
|---|---|---|
| within a week | 14 | 17% |
| in 1-2 weeks | 14 | 17% |
| in 3-4 weeks | 11 | 13% |
| in 1-3 months | 31 | 38% |
| after more than 3 months | 12 | 15% |
Quotes
Short excerpts in the original English, without usernames or links.
-
"my skin is less saggy, less dry and dull."
r/30PlusSkinCare, Sep 2024: collagen by mouth
-
"The change was subtle, makeup sat better, skin looked less tired, not lifting."
r/30PlusSkinCare, Dec 2025: perimenopause, collagen peptides
-
"In my 40s I started using copper peptide serum, which I find does improve the appearance of fine lines and skin texture if used consistently."
r/AsianBeauty, Sep 2026: copper-peptide serum on the skin
-
"I definitely notice a difference in my forehead fine lines when using it and think it really helps keep my skin plump!"
r/30PlusSkinCare, Nov 2025: multi-peptide serum on dry skin; another peptide serum did nothing
-
"That said I find the day after MN I look glowy and fresh."
r/30PlusSkinCare, Oct 2024: home microneedling over 18 months; the writer cannot judge the long-term effect
-
"while I haven't noticed any difference in my skin I do think it has improved my joints."
r/30PlusSkinCare, Jan 2025: collagen powder
-
"I've been using and have seen redness reduction and some scars fading for a week or so, but skin has gotten very oily and it doesn't look great."
r/SkincareAddiction, Mar 2024: copper-peptide serum on the skin
-
"Some days my skin feels a little smoother, but I can't tell if it's placebo or if I just slept well."
r/30PlusSkinCare, Jun 2025: several collagen products over a year
-
"I have noticed no difference in my hair skin or nails."
r/30PlusSkinCare, Aug 2024: collagen in coffee for a year and a half
-
"Yup, collagen broke me out as well! It gave me deep cysts which I don't normally get."
r/30PlusSkinCare, Oct 2024: collagen supplement; new spots stopped when the collagen was stopped
-
"my skin feels very fragile, loose, saggy and have so many fine lines I didn't have before"
r/30PlusSkinCare, Nov 2025: multi-peptide and copper-peptide serum
-
"while it does hydrate my skin, I’ve noticed some weird wrinkles that weren’t there prior to me using said peptide serum."
r/SkincareAddiction, Mar 2024: peptide serum without copper peptide
Where the accounts come from
The accounts come from public Reddit posts in r/30PlusSkinCare, r/Biohackers, r/SkincareAddiction, r/AsianBeauty, r/tretinoin, r/Supplements. They are about collagen, copper peptide (GHK-Cu), Matrixyl, Argireline and microneedling, and date from 1/2024 to 10/2026. Every item was read and coded by hand: product, goal, benefits, harms and time to first change.
The unit of counting is a person, not a post: accounts by the same writer were counted as one person, and no usernames were stored. Accounts that looked like marketing (68) were left out; with them the figures would be 417 people, of whom 308 reported a benefit. There were 56 accounts of injected GHK-Cu or GHK-Cu with no stated route; they have their own rows and are not in the shares. 9% of writers mentioned amounts; we do not repeat them.
Limitation: the data do not cover every post on the largest forums, and some accounts come from question threads.
What can be concluded
The accounts show why these products interest people: many describe healthier hair and nails or smoother, more glowing skin. They do not show whether the change came from the product, other skincare, the season or expectations, and they cannot separate a placebo effect. The writers are self-selected: satisfied and disappointed people post more often than others.
The research evidence and its levels: Collagen and peptides for skin.
Another summary made with the same method: BPC-157 user experiences.
Content is general information about research, not medical advice. If you have symptoms, contact a healthcare professional.