Can Collagen Cause Breakouts? What the Research Says
Can collagen cause breakouts? No trial or review we found reports acne or breakouts from collagen supplements. A 2019 systematic review of collagen for skin concluded it is generally safe with no reported adverse events. The catch: those trials measured wrinkles, hydration and elasticity, not pimples, so "no reports" is not the same as proof that collagen never causes them.
This page describes what published studies report. It is not medical advice.
Short answer
- Is there any study linking collagen to acne?
- None that we found. Searches of PubMed and ClinicalTrials.gov turned up no human study linking collagen peptides to acne.
- What did the collagen skin trials report on safety?
- Five randomized trials we read reported no adverse events, or none related to the product. A sixth, of a hair loss supplement with marine collagen, called it generally well tolerated.
- Why is that not the final word?
- The trials looked at wrinkles, hydration and elasticity. None counted acne, and the eight collagen hydrolysate studies in the 2019 review ran 8 to 24 weeks.
Sources: Oral collagen dermatology review, 2019 (PubMed); Collagen peptides and wrinkles trial, 2022 (PubMed); Collagen peptides and healthy skin trial, 2024 (PubMed); Collagen hydrolysates and facial skin trial, 2016 (PubMed); Collagen peptide skin trial, 2025 (PubMed); Collagen peptide hydration trial, 2018 (PubMed); Marine collagen hair loss supplement trial, 2023 (PubMed)
What did each collagen trial report about side effects?
Every trial below reported no product-related adverse events, or good tolerance, and none reported acne. This table lists the exact safety wording from each.
| Trial | Design | What it studied | Safety finding |
|---|---|---|---|
| 2016, collagen hydrolysates | Randomised, double-blind, placebo-controlled | Facial skin moisture, elasticity and aging signs | No adverse events during the trial |
| 2018, low-molecular-weight collagen peptide | Randomized, double-blind, placebo-controlled | Hydration, elasticity and wrinkling | No subjects had adverse symptoms related to the product |
| 2022, low-molecular-weight collagen peptides | Randomized, double-blinded, placebo-controlled | Wrinkles and skin properties | No adverse events or lab abnormalities linked to the product |
| 2024, low-molecular-weight collagen peptides | Randomized, double-blinded, placebo-controlled | Skin health | No participants had adverse events related to the product |
| 2025, low-molecular-weight collagen peptide | Randomized, double-blind, placebo-controlled | Skin aging and moisture in healthy adults | No adverse events reported throughout the study |
| 2023, marine collagen with amino acids, iron and selenium | Randomized, controlled, assessor-blinded, 3 months | Hair loss | Generally well tolerated |
Notice the third column. Not one of these trials set out to study acne. They studied wrinkles, moisture, skin aging or hair, and reported safety along the way. The 2023 hair trial also used a mix of ingredients, so its result is about the whole supplement, not collagen alone.
Sources: Collagen hydrolysates and facial skin trial, 2016 (PubMed); Collagen peptide hydration trial, 2018 (PubMed); Collagen peptides and wrinkles trial, 2022 (PubMed); Collagen peptides and healthy skin trial, 2024 (PubMed); Collagen peptide skin trial, 2025 (PubMed); Marine collagen hair loss supplement trial, 2023 (PubMed)
What "no adverse events" does and does not mean
It means no adverse events were reported. It does not mean the researchers checked each person for new pimples.
A trial that is looking for wrinkle change will catch side effects that people report or that show up in lab tests. A mild breakout might never be written down as an adverse event. That is the honest gap in this research: the absence of acne reports is weak evidence, and no study has been built to test the question directly.
Sources: Collagen peptides and wrinkles trial, 2022 (PubMed); Collagen peptide skin trial, 2025 (PubMed)
What did the big reviews conclude?
The reviews found collagen helped some skin measures and raised no safety alarms, but none of them reports acne as an outcome.
A 2019 systematic review of collagen in dermatology concluded that collagen supplementation is generally safe with no reported adverse events. In that review, eight studies used collagen hydrolysate for pressure ulcers, dry skin (xerosis), skin aging and cellulite. The review reports:
2.5 g to 10 g a day, for 8 to 24 weeks
Disclaimer: these are the amounts used in research, not a recommendation. Decisions about what to take belong with a licensed clinician who knows your history.
A 2021 meta-analysis pooled 19 studies with 1,125 participants aged 20 to 70, and 95% of them were women. It concluded that taking hydrolyzed collagen for 90 days reduced wrinkles and improved skin elasticity and hydration.
A 2023 meta-analysis of 26 randomized controlled trials with 1721 patients looked at hydration and elasticity. It also found several biases in the trials it included. Mostly women, mostly aging skin, and some bias: those limits matter for anyone whose concern is acne, since the trials focused on aging skin. For an overview of collagen types, see our collagen peptides guide.
Sources: Oral collagen dermatology review, 2019 (PubMed); Hydrolyzed collagen skin aging meta-analysis, 2021 (PubMed); Oral collagen skin anti-aging meta-analysis, 2023 (PubMed)
Does collagen make skin oilier?
The one trial in our sources that measured skin oil found the opposite. A 2025 randomized trial of a collagen peptide supplement reported decreased sebum secretion, which the authors said suggested pore-tightening effects.
The same trial reported that its effects held during a 2-week break from the product, and that no adverse events were reported for the whole study. One trial is not enough to say collagen helps oily skin. It does cut against the idea that collagen makes skin greasier.
Context: what is known about diet, supplements and acne
Context only. None of the sources in this section studied collagen.
The NIH skin institute (NIAMS) says some studies show that eating certain foods may make acne worse, and that researchers are still studying diet as a cause. MedlinePlus says chocolate and greasy foods are often blamed, but there is little evidence that foods have much effect on acne in most people.
The clearest diet signal is about sugar load, not protein. A 2022 systematic review found high glycemic index and higher daily glycemic load were linked to acne and acne severity, supported by randomized trials.
Some people also wonder about vitamins. In a 2015 study of how vitamin B12 affects skin bacteria, one of 10 people developed acne one week after taking vitamin B12. That is a single person in a tiny study. We found no source on what collagen products usually add, so read your own product's label to see what else is in it.
Sources: NIAMS (NIH): Acne; MedlinePlus: Acne; Diet and acne systematic review, 2022 (PubMed); Vitamin B12 and acne study, 2015 (PubMed)
Should I take collagen if I have acne?
No study we found tested collagen in people who have acne, so the research cannot answer this for you.
Collagen is sold as a dietary supplement. The FDA says supplement firms are responsible for evaluating the safety and labeling of their products before marketing, so the FDA has not checked that a given product is right for acne-prone skin. A dermatologist who knows your skin is the person to ask. For skin basics, see our skincare guide.
Sources: FDA: Dietary Supplements
What are the symptoms of too much collagen?
No official or research source we found defines symptoms of too much collagen. No trial we read tested high doses to find a limit.
What we can say is the range the studies used. The eight collagen hydrolysate studies in the 2019 review used 2.5 g to 10 g a day, and that review reported no adverse events. Amounts above that range were not covered by the trials we read. For an overview of collagen, see our collagen guide.
Common questions
Can collagen supplements cause acne?+
No trial or review we found reports acne or breakouts from collagen. The skin trials reported no adverse events related to collagen, but they measured wrinkles, hydration and elasticity, not acne counts. So there is no evidence of a link, and no proof that there is none.
Should I take collagen if I have acne?+
No study we found tested collagen in people with acne, so the research cannot answer this for you. A dermatologist or other licensed clinician who knows your skin is the right person to ask.
What are the symptoms of too much collagen?+
No official or research source we found defines symptoms of too much collagen, and no trial we read tested high doses. The trials in one 2019 review used 2.5 g to 10 g a day.
Does collagen make your skin oily?+
One 2025 randomized trial reported decreased sebum (skin oil) secretion, which the authors said suggested pore-tightening effects. That is the opposite of oilier skin, but it is one trial.
Is collagen safe for your skin?+
A 2019 systematic review concluded collagen supplementation is generally safe with no reported adverse events. A 2023 meta-analysis noted several biases in the trials it included.
Sources: Oral collagen dermatology review, 2019 (PubMed); Collagen peptide skin trial, 2025 (PubMed); Oral collagen skin anti-aging meta-analysis, 2023 (PubMed)
Related reading
This guide is for education only and is not medical advice. It describes what published studies and official health sources report about collagen supplements and acne. Talk to a dermatologist or other licensed clinician about your own skin.