Collagen supplements are among the most popular wellness products in Canada, sold as powders, capsules, gummies and drinks. They promise firmer skin, healthier joints and stronger hair and nails. Here is a look at what the evidence actually shows.

What is collagen?

Collagen is the most abundant protein in the body. It provides structure to skin, tendons, ligaments, cartilage and bones. Your body makes collagen naturally, but production declines with age, and sun exposure and smoking speed up its breakdown.

How supplements work

Most supplements contain hydrolyzed collagen, also called collagen peptides, from cows, pigs, fish or chicken. When you swallow collagen, it is broken down into amino acids and small peptides. Researchers are still studying whether these peptides send signals that encourage the body to produce more collagen.

What the evidence suggests

• Skin: several randomized trials report modest improvements in skin hydration and elasticity after 8 to 12 weeks. Many studies are small and funded by manufacturers.
• Joints: some studies suggest reduced joint discomfort in athletes and people with osteoarthritis, but results are mixed.
• Bones and muscle: early research is promising when combined with exercise, but more evidence is needed.
• Hair and nails: evidence is limited.

Common myths

1. Myth: collagen goes straight to your skin. It is digested like other proteins first.
2. Myth: more is better. Studies typically use doses of about 2.5 to 15 grams per day.
3. Myth: collagen replaces sunscreen or skincare. Sun protection is still the most important step for skin aging.
4. Myth: plant-based collagen exists. True collagen comes from animals; vegan products contain ingredients meant to support the body’s own production.

How to choose a product in Canada

• Look for a Natural Product Number (NPN) on the label, which means Health Canada has reviewed it.
• Check the source (bovine, marine) if you have allergies or dietary restrictions.
• Avoid products with large amounts of added sugar.
• Be sceptical of dramatic before-and-after claims.

Food first

Eating enough protein, plus vitamin C, zinc and copper, gives your body the building blocks to make collagen. Bone broth, fish, poultry, eggs, beans and leafy greens all help. Read about the benefits of vitamin C.

The bottom line

Collagen supplements are generally safe for healthy adults and may offer modest benefits for skin and joints. They are not a miracle solution. Talk to your doctor or pharmacist if you are pregnant, have kidney disease or take medications.

This article is for general information and is not medical advice.