Collagen Peptides 101: Benefits, Dosage and How to Use Them

The Short Answer

Collagen peptides are collagen protein that's been broken down into small pieces so it dissolves easily and absorbs well. Collagen is the main structural protein in your skin, tendons, ligaments and bones, and your body makes less of it as you age.

The research is most encouraging for joints and connective tissue, especially combined with exercise. For skin, the picture is genuinely mixed: plenty of studies show benefits, but recent independent reviews are more sceptical. Most studies use 5–15g a day, taken consistently for at least two to three months.

Below we'll cover the science, what the research really shows (including the arguments against), how much to take, and how to get the most out of it.

What Is Collagen, and What Does "Hydrolysed" Mean?

Collagen is the most abundant protein in your body. Think of it as scaffolding: it gives your skin its firmness and holds your tendons, ligaments, cartilage and bones together. Your body keeps making it throughout life, but production slows as you get older (AIS).

The main types:

• Type I is the most common, found in skin, tendons, ligaments and bone.
• Type II is found mainly in cartilage.
• Type III sits alongside Type I in skin, blood vessels and other tissues.

Collagen also has an unusual amino acid profile. Around a third of it is glycine, and it's rich in proline and hydroxyproline, which are rare in other proteins. (If you're curious about glycine on its own, see our Glycine 101 guide.)

What "hydrolysed" means: collagen is a long, tough, triple-stranded protein. Hydrolysis uses enzymes to cut those long chains into short pieces called peptides. That's why collagen peptides dissolve in cold water and coffee without turning into jelly the way gelatin does, and why they're easy to digest and absorb.

Collagen vs gelatin vs bone broth: all three come from the same raw material. Gelatin is partly broken down and sets when cool. Bone broth contains collagen, but the amount varies so much that the Australian Institute of Sport says it can't be relied on for a set dose (AIS). Hydrolysed peptides give you a measured dose that mixes into anything.

One thing collagen isn't: a complete protein. It contains virtually no tryptophan, one of the essential amino acids, and less leucine than proteins like whey. So it's great for its own job, but don't count it as your main protein source for building muscle.

Collagen Benefits, Ranked by Evidence

Collagen is one of the most marketed supplements on the shelf, so it's worth being clear about what the research does and doesn't show.

Joints

In a 12-week trial of 139 athletes with knee pain during activity, 5g a day of collagen peptides reduced activity-related pain more than a placebo, and the collagen group needed fewer other treatments (Zdzieblik et al., 2017, via Nutritional Outlook). Pain at rest and knee range of motion didn't change significantly.

Tendons, ligaments and injury recovery

In a small study of eight healthy men, participants took vitamin C-enriched gelatin (a less-processed form of collagen) an hour before a short bout of skipping. On 15g, a blood marker of collagen production doubled (Shaw et al., 2017).

The Australian Institute of Sport rates collagen as a Group B supplement, meaning the evidence is emerging. It notes that collagen "has recently been shown to shorten return to play time" after tendon and ligament injuries, and that it likely works by amplifying the effect of targeted rehab exercises (AIS).

Bone

In a year-long trial of 131 postmenopausal women, 5g a day of collagen peptides increased bone mineral density at the spine and hip compared with a placebo (König et al., 2018). That's encouraging, but it's essentially one trial, and collagen is no substitute for calcium, vitamin D, strength training or medical advice on bone health.

Muscle

In a 12-week trial of 53 older men with age-related muscle loss, all doing the same strength training, the men taking 15g of collagen a day gained 4.2 kg of lean mass compared with 2.9 kg on placebo, and lost more fat (NutraIngredients, on Zdzieblik et al., 2015). Interesting, but remember that collagen is an incomplete protein. If muscle is your goal, a complete protein like whey is the more reliable choice.

Skin

This is the most popular reason people take collagen, and the most hotly debated. A 2025 review pooled 23 trials with 1,474 people. Taken together, they showed improvements in skin hydration, elasticity and wrinkles. But when the authors looked only at the highest-quality studies, or only at studies not funded by industry, the benefit disappeared (NutraIngredients, on Myung and Park, 2025).

The collagen industry pushed back hard, pointing out that the review lumped very different products together and that most trials used low doses of around 3g a day. The honest summary: there are reasons to be hopeful, but the skin evidence isn't settled.

A note on funding: much of the collagen research is funded by the companies that make collagen ingredients. That doesn't make it wrong, but it's a good reason to keep your expectations realistic.

How Much Collagen Should You Take?

There's no official recommended dose, so these figures come from the research.

Start with 10g a day. It covers the doses used for joints, bone and skin, and it's a comfortable amount to mix into a drink.

Be patient. Collagen isn't something you'll feel in a week. Most of the trials that found benefits ran for three months or more, so take it every day and judge it after about 12 weeks.

The Australian Institute of Sport's injury and rehab protocol uses a bigger dose of 15–20g, timed before exercise (AIS). If you're coming back from a tendon or ligament injury, that's worth discussing with your physio or sports dietitian.

The Best Way to Use Collagen

Take it every day. For general use, consistency matters far more than timing. Pick a moment you won't forget, like your morning coffee, and stick with it.

Mix it into whatever you're already drinking. Hydrolysed peptides dissolve in hot or cold liquids without clumping or setting. Unflavoured works in coffee, tea, smoothies and soups. Flavoured versions are made for a glass of cold water.

Get enough vitamin C. Your body needs vitamin C to build collagen, so your diet needs to cover it. The AIS notes it's unclear whether extra vitamin C helps beyond normal intake, which is easy to reach with fruit and vegetables (AIS). A piece of fruit or a squeeze of citrus with your collagen is a simple habit. If your diet is light on fruit and veg, a small serve of vitamin C powder is an easy top-up.

Time it before training for tendons and rehab. Amino acids from collagen peak in your blood 40–60 minutes after you take it, so that's the window the AIS uses before rehab or exercise sessions (AIS).

Pair it with exercise. Collagen seems to work best alongside loading. The AIS describes exercise as the key component, with collagen likely amplifying the effect of targeted exercises. For joints and tendons, that means strength work and your physio's rehab program.

Don't swap it for your protein shake. Collagen is a great addition, but it isn't a complete protein. Keep whey or other complete proteins as your main source for hitting your protein target.

Combine it with glycine if sleep is on your list. Collagen in the morning and glycine before bed is a popular combination. See our Glycine 101 guide for the sleep research.

Is Collagen Safe? Side Effects and What It Won't Do

Collagen is a food protein, and at normal doses it's well tolerated by most people. A few things to be aware of:

• Mammalian meat allergy (alpha-gal). This tick-bite allergy is well known in parts of Australia. ASCIA advises people with it to avoid mammalian gelatin and meat products (ASCIA). Bovine collagen comes from cattle, so check with your doctor before using it if you have this allergy.
• Vegetarians and vegans. All collagen is animal-derived, so it doesn't suit plant-based diets (AIS).
• Kidney disease or a protein-restricted diet. Collagen adds to your total protein intake, so check with your doctor first. The same goes for any other existing health condition, or if you're pregnant or breastfeeding.
• Tested athletes. The AIS reminds athletes that all supplements carry some doping risk and that they are responsible for anything they take (AIS).

What collagen won't do:

• It won't replace a complete protein for building muscle.
• It won't undo sun damage. Sunscreen, not smoking and a good diet still matter far more for your skin.
• It isn't a treatment for arthritis, osteoporosis or an injury. See your GP or physio for those, and treat collagen as a possible add-on, not the plan.

Focal Nutrition Hydrolysed Collagen Peptides

Ours is 100% hydrolysed bovine collagen peptides: Type I and III collagen, enzymatically broken down into small peptides, and third-party tested. It comes unflavoured or in three flavours: Grape Burst, Pineapple Splash and Apple-Kiwi Fusion.

How to use it: mix 4 scoops (10g) a day into coffee, a smoothie, a shake or water, alongside a diet with plenty of vitamin C.

Which flavour? Unflavoured is the most versatile and disappears best into coffee or a smoothie. If you like to drink your collagen in plain water, a flavour makes it far more enjoyable.

The 200g tub is a good way to find your favourite. Since the research points to daily use for at least three months, the 1kg bag is the better buy once you're committed.

Shop Focal Nutrition Hydrolysed Collagen Peptides

To cover your vitamin C, add our Vitamin C powder. Or get collagen, vitamin C and GlyNAC together in our Radiance Skin Bundle.

Collagen FAQ

Do collagen supplements actually work?

For joints and connective tissue, especially alongside exercise, the research is encouraging. For bone, there's one promising year-long trial. For skin, results are mixed, and the best independent studies haven't found a clear benefit. Collagen is worth trying if you're consistent and realistic, not as a miracle fix.

What's the best time to take collagen?

Any time that you'll remember every day. The exception is tendon and ligament rehab, where the AIS uses a dose 40–60 minutes before training.

How long does collagen take to work?

Most of the trials that found benefits ran for 12 weeks or longer. Take it daily and judge it after about three months.

Can I put collagen in hot coffee?

Yes. Hydrolysed collagen peptides dissolve easily in hot drinks, which is why coffee is one of the most popular ways to take them.

Does collagen count towards my daily protein?

It contains protein, so it adds to your total. But it's an incomplete protein, so don't rely on it to hit your protein target. Keep whey or other complete proteins as your main source.

Is bovine or marine collagen better?

Both are mostly Type I collagen, and there's no strong evidence that one works better than the other. Bovine collagen also provides Type III. Marine collagen suits people who don't eat red meat.

Should I take collagen or glycine?

They do different jobs. Collagen is the one with research on joints, bone and skin. Glycine on its own is better studied for sleep. Many people take both. Our Glycine 101 guide covers the sleep research.

General information only, not medical advice. Supplements are not a substitute for a balanced diet. Check with your GP or pharmacist before taking collagen if you have a health condition or allergy, take medication, or are pregnant or breastfeeding.

Sources

• Collagen infographic, Australian Institute of Sport
• Collagen peptides reduce knee discomfort in athletes, study suggests, Nutritional Outlook, on Zdzieblik et al., Applied Physiology, Nutrition, and Metabolism, 2017
• Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis, Shaw et al., American Journal of Clinical Nutrition, 2017
• Specific collagen peptides improve bone mineral density and bone markers in postmenopausal women, König et al., Nutrients, 2018
• Collagen peptides plus exercise show muscle benefits for the elderly, NutraIngredients, on Zdzieblik et al., British Journal of Nutrition, 2015
• Industry pushes back on meta-analysis concluding collagen supplements show no benefit for skin aging, NutraIngredients, August 2025, on Myung and Park, American Journal of Medicine, 2025
• Mammalian meat allergy and tick FAQ, ASCIA