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Collagen Supplements

Kirkland Joint Health Supplement Tested

May 30, 2025
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Due to its popularity among CL members, we recently tested Kirkland Triple Action Joint Supplement, which contains a "proprietary" UC-II cartilage blend. See what we found in our Collagen Supplements Review, which includes our Top Pick for collagen for joints and for skin.

Also see our recent Joint Health Supplements Review, covering glucosamine, chondroitin, MSM, and Boswellia.

Collagen for Eye Wrinkles?

May 05, 2025
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Did taking a popular type of collagen reduce eye wrinkles in a recent study? Find out in our Collagen Supplements Review, which includes our Top Pick collagen supplements for skin and for joints.

Collagen Product Change

April 04, 2025
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One of our Top Picks among collagen products has been replaced by a similar product with a different name from the same brand. For details, see the Update in our Top Picks among collagen supplements.

Collagen for Strength?

March 24, 2025
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Did supplementing with hydrolyzed collagen along with resistance training improve leg strength in middle-aged men? Find out what a recent study showed in the Building muscle and muscle strength section of our Collagen Supplements Review.

Also see our Top Picks for collagen for joints and tendons and collagen for skin.

Collagen: Liquid vs. Powder

March 17, 2025
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Is liquid collagen better than collagen powder? Find out in the ConsumerTips section of our Collagen Supplements Review, which includes our Top Picks for skin and joints and tendons.

Collagen to Reduce Fatigue?

September 26, 2024
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Did supplementing with collagen peptides reduce fatigue? Find out what a recent study showed in the Fatigue section of our Collagen Supplements Review, which includes our Top Picks for collagen.

Eggshell Membrane for Osteoarthritis?

September 16, 2024
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Did taking an eggshell membrane supplement (a source of collagen) improve symptoms and joint space in people with knee osteoarthritis? Find out what a recent study showed in the Joint Pain and Function section of our Collagen Supplements Review, which includes our Top Pick collagen for joints and tendons as well as our Top Pick collagen for skin.

Best Source of Collagen?

September 09, 2024
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What is the best source of collagen -- fish, porcine (pig), or bovine (cow)? See what a recent study found that compared how well each of these raised blood markers of collagen. It's in the What It Is section of our Collagen Supplements Review, which includes our Top Picks among collagen supplements.

Collagen vs. Moisturizer?

August 19, 2024
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Can taking collagen noticeably improve aged skin for people already using a daily moisturizer? Find out what a recent study showed in the Aging skin and wrinkles section of our Collagen Supplements Review, which includes our Top Picks for collagen supplements.

Also see: Does CoQ10 reduce wrinkles, increase skin elasticity, or tighten the skin? Are there any other supplements that can help?

Collagen Sources

April 19, 2024
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Wondering if your collagen is from pigs, cows, or fish? We have tested them all, as discussed in the Top Picks section of our Collagen Supplements Review.

Vegan Collagen?

December 22, 2023
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Find out if VeCollal, a vegan collagen alternative, actually contains collagen and if there is evidence that it reduces wrinkles. Also see our Top Pick collagen supplement for skin.

Also, learn whether adding collagen to coffee is likely to reduce the heart benefits of coffee.

Collagen For Bone Health?

November 03, 2023
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Is there evidence that collagen peptides (as in Fortibone) strengthen bones? Find out in the bone health section of our Collagen Supplements Review. Also see our Top Picks for collagen for skin and joint health.

Also see: Do any supplements or diets help prevent or treat osteoporosis?

Collagen Plus MSM for Skin?

October 31, 2023
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Does taking MSM along with collagen reduce skin roughness or wrinkles as much as collagen without MSM? See what a new study found in the Aging skin and wrinkles section of our Collagen Supplements Review. Also see our Top Picks among collagen supplements for skin.

Collagen for Stronger Bones?

October 06, 2023
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Can collagen supplementation help strengthen bones? Find out what studies suggest in the Bone health section of our Collagen Supplements Review.

Also see: Do any supplements or diets help prevent or treat osteoporosis?

Does Collagen Affect Bone Tests?

July 11, 2023
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Does collagen supplementation affect blood tests for osteoporosis? Find out in the Concerns and Cautions section of our Collagen Supplements Review, which includes our Top Picks among collagen supplements.

Also see: Which vitamins and supplements should be stopped before getting blood work and laboratory tests?

Collagen "Boosters"?

March 14, 2023
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A CL Member asked if taking Essential Skin Food -- or other non-collagen products marketed for collagen production -- reduces wrinkles. Find out in the ConsumerTips section of our Collagen Supplements Review.

Also see our Top Pick collagen supplements for skin health and for joint pain.

Collagen and Depression?

March 10, 2023
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Can taking collagen cause depression? Find out, and learn about other potential side effects of collagen, in the updated Concerns and Cautions section of our Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Also see: What are the best supplements for depression and anxiety?

Fish Collagen?

February 22, 2023
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A CL member asked whether fish or other marine sources of collagen are good alternatives to collagen from chicken, pigs, or cows, and if there are plant-based sources of collagen. Find out about fish collagen and learn about "plant-based" collagen boosters in our Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Collagen for Wrinkles?

December 20, 2022
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How much did collagen supplementation reduce the severity of "crow’s feet" wrinkles around the eyes in a recent study? Find out in the Aging skin and wrinkles section of our Collagen Supplements Review. Also see our Top Picks among collagen supplements for skin and for joints.

Does Collagen Reduce Gum Inflammation?

October 28, 2022
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Learn if taking a daily collagen supplement after dental cleaning reduced subsequent swelling and bleeding of the gums in the Healing of skin and tendon injuries section of our Collagen Supplements Review.

See our separate article about the best toothpaste and mouthwash for reducing bleeding gums.

Collagen Concern?

September 07, 2022
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Can taking too much collagen cause too much calcium in the blood? Find out in the Concerns and Cautions section of our Collagen Supplements Review.

Eggshell Membrane for Osteoarthritis?

June 07, 2022
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Eggshell membrane – a source of collagen – may reduce pain in people with osteoarthritis if taken at a certain dose, according to a recent study. Get the details in the Joint Pain section of our Collagen Supplements Review.

Collagen for Joint Discomfort?

March 29, 2022
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Can supplementing with low-dose collagen reduce joint pain in healthy older adults? Find out what a recent study showed in the Joint Pain section of our Collagen Supplements Review. Also see our Top Picks for collagen.

Does Collagen Increase Kidney Stone Risk?

December 23, 2021
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A member asked whether supplementing with collagen increases the risk of kidney stones, since collagen can produce oxalates. Find out in the Concerns and Cautions section of our Collagen Supplements Review. Also, see our Top Picks for collagen supplements.

Can Collagen Lower Blood Sugar?

September 16, 2021
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Can taking collagen supplements lower blood sugar levels? Find out what research suggests in the What It Does section of our Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Collagen for Wrinkles

September 06, 2021
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Can taking hydrolyzed collagen in low daily doses reduce wrinkles and improve skin hydration in older women? Find out what a recent study showed in the What It Does section of our Collagen Supplements Review. Also, see our Top Picks among collagen supplements for skin wrinkles.

Collagen for Joint Pain?

July 23, 2021
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Can collagen supplementation reduce joint pain or stiffness in the knee, hip or wrist? See what a new study found in the Joint Pain section of our Collagen Supplements Review. Also see our Top Picks among collagen supplements for joints and for skin.

Hyaluronic Acid for Wrinkles?

June 27, 2021
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Does supplementing with hyaluronic acid reduce wrinkles or improve skin elasticity in middle-aged men and women? See what a new study found in the Aging Skin and Wrinkles section of our Collagen Supplements Review. Also see our Top Picks for collagen supplements for skin and for joints.

Collagen and Breast Cancer?

April 22, 2021
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Does supplementing with collagen increase the risk of breast cancer recurrence? Learn what the evidence shows in the Concerns and Cautions section of our Collagen Supplements Review.

Collagen for Wound Healing?

December 12, 2020
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Can collagen supplements improve the healing of skin and tendon injuries? Find out in the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Eggshell Membrane + Fish Oil for Joint Pain?

August 13, 2020
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Both eggshell membrane and fish oil have been shown to bring modest reduction in joint pain, but does taking these ingredients together have greater benefit? Find out what a new study showed in the What It Does section of the Collagen Supplements Review. Also see our Top Pick among collagen supplements for joints and for skin.

Fish Collagen Allergy

June 26, 2020
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Be aware that some people may be allergic to fish collagen even if they don't respond to common fish allergy tests, according to a recent study. Get the details in the Concerns and Cautions section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for skin and for joints.

Collagen for the Skin

March 27, 2020
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Supplementing with collagen to improve aging skin is popular, but does it work? The latest study with collagen used a higher dose than other studies, but is a higher dose better? Find out in the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen for wrinkles and for osteoarthritis.

Collagen for Sun Damaged Skin?

February 14, 2020
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A study suggests that fish-derived collagen can improve sun-damaged skin. For details, including dosage, see the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Collagen for Knees?

January 31, 2020
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Collagen supplements have been tested in many studies to reduce pain and/or improve function in osteoarthritic knees. A recent study focused on collagen peptides. Find out if they worked (and see the results for other collagen products) in the Joint Pain section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for joint pain and for wrinkles.

Collagen vs. Whey for Muscle

January 11, 2020
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Does taking collagen protein increase muscle as well as whey protein? Find out what a recent study showed in the "Building Muscle" sections of both the Protein Powders Review and the Collagen Supplements Review. Also see our Top Picks for protein powders and Top Picks for collagen.

Eggshell Membrane for Hair, Skin, Nails?

January 06, 2020
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Does supplementing with eggshell membrane (which contains collagen and elastin) improve hair, skin, or nails? See what a recent study found in the What It Does section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Eggshell Membrane for Joints?

December 06, 2019
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Eggshell membrane hydrolysates, which naturally contain collagen, have been used in clinical studies to treat joint pain. Find out if they work in the Joint section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Collagen Peptides vs. Gelatin

October 14, 2019
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It has been generally believed that amino acids are more bioavailable from hydrolyzed collagen (collagen peptides) than from gelatin (which is partially hydrolyzed collagen). A new study put this to the test. See what the researchers found in the What It Is section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Eggshell Membrane for Bad Knees?

October 10, 2019
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Eggshell membrane, which naturally contains collagen, was tested as a supplement to improve knee pain, stiffness, and function. Find out if it worked in the Joint Pain section of the Collagen Supplements Review. Also see our Top Picks for collagen.