How Much Collagen Should I Take Daily? 2.5 to 15 g of Peptides, or 40 mg of UC-II for Joints
Take 2.5 to 15 g of collagen peptides a day. Skin trials used 2.5 to 5 g and muscle trials used 15 g. One scoop of most powders is 10 to 20 g, so one scoop a day covers it. For joints there is a second option: UC-II, a different kind of collagen, taken at just 40 mg a day.
By Erin Rose Updated October 17, 2026 How we score
Ready to buy? Our pick for most people
BulkSupplements Hydrolyzed Bovine Collagen
11 g a serving · $0.56 per 10 g · on the NSF Certified for Sport testing list
Plain collagen with nothing added, and our top-scored powder. How we picked.
Powder costs are brand prices per 10 g; capsule and gummy costs are Amazon prices (November 6, 2026).
How much collagen a day, by goal
| Goal | A day | Trials ran |
|---|---|---|
| Skin (elasticity, moisture) | 2.5 to 5 g of peptides | 8 to 12 weeks |
| Joints | 40 mg of UC-II, or 10 g of peptides | 3 to 6 months |
| Muscle, with strength training | 15 g of peptides | 12 weeks |
| Nails | 2.5 g of peptides | 24 weeks, one small trial |
Which collagen is right for you?
A dose only works if the product can deliver it. These are the common mix-ups.
Taking collagen capsules? You’re likely short.
Most capsules hold well under a gram of collagen, so the typical capsule label adds up to just 1.8 g a day (what labels say). One serving of powder replaces about 20 capsules. Transparent Labs puts 22 g in one serving and has full marks on our score, like our pick.
Transparent Labs Grass-Fed Collagen
$0.76 per 10 g · Informed Choice
Taking it for skin? The trial dose was just 2.5 g.
In an 8-week trial, women who took 2.5 g of Verisol collagen a day had more elastic skin than women on a placebo (Proksch 2014). That trial was run with the maker; independent trials have found no change (collagen for skin). If you would rather chew than stir, Nature Made's gummies give that same 2.5 g of Verisol in 3 gummies, with 6 g of sugar.
Nature Made Collagen Peptides + C Gummies
$0.85 a day on Amazon
Buying collagen for your knees? You may want a different kind.
UC-II is collagen from chicken cartilage that is kept whole, and it is taken at 40 mg a day, not grams. In a 6-month trial paid for by its maker, 40 mg a day eased knee osteoarthritis symptoms more than a placebo and more than glucosamine with chondroitin (Lugo 2016). One capsule a day is the dose.
Healthy Origins UC-II
$0.27 a day on Amazon
Lifting weights? Take at least 15 g.
In a 12-week trial, older men who took 15 g of collagen after strength training gained more muscle than men on a placebo (Zdzieblik 2015). Transparent Labs gives 22 g in one serving and is on Informed Choice, which screens for drugs banned in sport. That matters if you are drug-tested. Our pick, BulkSupplements, is on NSF Certified for Sport, at 11 g a serving.
Transparent Labs Grass-Fed Collagen
$0.76 per 10 g · Informed Choice
How to take collagen
Take it every day, at any time of day. It mixes into hot or cold drinks. Give it 8 to 12 weeks before you judge it. Your body also needs vitamin C to make its own collagen, so eat fruit and vegetables or take a multivitamin (Pullar 2017). For skin, pair it with daily sunscreen, which slowed skin aging in a 4.5-year trial (Hughes 2013); one option is EltaMD UV Clear SPF 46.
What collagen labels tell you to take
We read 598 collagen labels in the NIH label database; 465 gave enough detail to compare. The dose a day is the amount on the label times the servings the label says to take.
| Format | Typical dose a day | Under 2.5 g |
|---|---|---|
| Powder (321 labels) | 11 g | 3% |
| Capsule or tablet (144 labels) | 1.8 g | 71% |
UC-II is the exception to the capsule problem: its dose is 40 mg, so one small capsule is right for it.
Is collagen safe?
For most people, yes. The most common complaint is a full stomach. Skip marine collagen if you are allergic to fish. UC-II comes from chicken. For a powder on a testing list, see the best collagen.
Questions people ask
Is 20 g of collagen too much?
No. There is no official upper limit for collagen, which is a food protein, and 20 g is a normal two-scoop serving. It has not been shown to work better than 10 to 15 g.
Why is UC-II only 40 mg?
UC-II is kept whole and is thought to work through the gut's immune system, not as a building block, so its trials used milligrams.
Can collagen replace my protein powder?
No. Collagen has no tryptophan, an amino acid you need from food. One analysis found collagen can make up about a third of your daily protein before your amino acids fall out of balance (Paul 2019).
Sources
- Proksch E, et al. “Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study.” Skin Pharmacol Physiol. 2014. PubMed 23949208
- Pu SY, et al. “Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis.” Nutrients. 2023. PubMed 37432180
- Lugo JP, et al. “Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms.” Nutr J. 2016. PubMed 26822714
- Crowley DC, et al. “Safety and efficacy of undenatured type II collagen in the treatment of osteoarthritis of the knee.” Int J Med Sci. 2009. PubMed 19847319
- García-Coronado JM, et al. “Effect of collagen supplementation on osteoarthritis symptoms: a meta-analysis of randomized placebo-controlled trials.” Int Orthop. 2019. PubMed 30368550
- Zdzieblik D, et al. “Collagen peptide supplementation in combination with resistance training improves body composition and increases muscle strength in elderly sarcopenic men.” Br J Nutr. 2015. PubMed 26353786
- Jendricke P, et al. “Specific Collagen Peptides in Combination with Resistance Training Improve Body Composition and Regional Muscle Strength in Premenopausal Women.” Nutrients. 2019. PubMed 31010031
- Hexsel D, et al. “Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails.” J Cosmet Dermatol. 2017. PubMed 28786550
- Pullar JM, et al. “The Roles of Vitamin C in Skin Health.” Nutrients. 2017. PubMed 28805671
- Paul C, et al. “Significant Amounts of Functional Collagen Peptides Can Be Incorporated in the Diet While Maintaining Indispensable Amino Acid Balance.” Nutrients. 2019. PubMed 31096622
- Hughes MC, et al. “Sunscreen and prevention of skin aging: a randomized trial.” Ann Intern Med. 2013. PubMed 23732711
- Collagen labels: NIH Dietary Supplement Label Database, 598 labels read, 465 with enough detail to compare. Healthy Origins UC-II label: Amazon listing B06XW695RT, read October 24, 2026.