Walk down any health food aisle, or spend five minutes on Instagram, and you will see collagen powders and gummies promising firmer skin, stronger nails and pain-free joints. At a significant price per tub, it is a real investment, and clients regularly ask me, as a registered nutritionist, whether it is actually worth it or just clever marketing. As with most supplement questions, the honest answer sits somewhere in the middle.
What collagen actually is
Collagen is the most abundant protein in your body, forming a major structural component of your skin, joints, tendons, ligaments and bones. Your body produces collagen naturally, using amino acids from the protein you eat, alongside vitamin C, zinc and copper as supporting nutrients. Collagen production naturally starts to decline from around your mid-twenties onwards, which is part of why skin gradually loses some firmness and elasticity, and joints can feel less resilient, as we get older. There are actually several different types of collagen in the body, with type I being the most abundant and found largely in skin, bone and tendons, and type II found predominantly in cartilage, which is why you will see supplements marketed specifically towards either skin or joint health depending on which type, or blend of types, they contain.
What the current evidence suggests
Research into collagen supplements, usually in the form of hydrolysed collagen peptides, has grown considerably over the past decade. Some studies looking at skin have found modest improvements in hydration and elasticity with regular supplementation over several weeks to months, and some research into joint comfort, particularly in people with joint discomfort related to activity or age, has shown promising results too.
That said, I want to be honest about the limitations here: many of these studies are relatively small, some are funded by collagen manufacturers themselves, and results are not entirely consistent across all the research available. The evidence is genuinely promising and developing, rather than being definitive proof that collagen supplements work for everyone. I would describe it as a reasonable option to consider, rather than a guaranteed solution, and it is worth setting realistic expectations before you spend money on a tub that promises visible results within days.
It is also worth remembering that collagen supplements are digested in the gut like any other protein, broken down into individual amino acids and peptides before being absorbed. There is ongoing scientific debate about exactly how much of an ingested collagen supplement genuinely ends up being used by the body to build new collagen in the skin or joints specifically, as opposed to being used more generally as a protein source, similar to any other dietary protein. This does not mean supplements are pointless, but it is a good reason to hold expectations realistically rather than assuming a direct, guaranteed effect.
Supporting your body's own collagen production through food
Before reaching for a supplement, it is worth knowing that you can support your body's natural collagen production directly through food, and this is where I usually start with clients in consultations. The building blocks and cofactors your body needs include:
- Vitamin C, essential for collagen synthesis, found in citrus fruit, peppers, strawberries, kiwi and broccoli
- Protein from a variety of sources, providing the amino acids collagen is built from, including glycine and proline found particularly in bone broth, meat, fish, eggs, beans and lentils
- Zinc, found in seeds, nuts, wholegrains, and meat or pulses, which supports collagen formation
- Copper, found in nuts, seeds, wholegrains and shellfish, another important cofactor
- Limiting excess sugar and, if relevant, smoking, both of which are linked to faster collagen breakdown
If you are considering a supplement
If, after building a solid food-first foundation, you would still like to try a collagen supplement, there are a few general points worth keeping in mind. Hydrolysed collagen peptides are the most researched form, and benefits, where they occur, tend to take several weeks to months of consistent use to become noticeable, rather than happening overnight, so it is worth committing to a reasonable trial period rather than judging results after a week or two. Powders that dissolve into coffee, smoothies or water tend to be the most flexible way to include collagen in an existing routine, though capsules are also available if you prefer.
I would not recommend chasing a specific brand or dosage based on marketing claims, since the research in this area does not yet support one precise, universally "correct" protocol, and this is really an area where personalised, professional guidance is more useful than a generic recommendation. It is also worth noting that most collagen supplements are derived from bovine, marine or porcine sources, so if you follow a vegetarian or vegan diet, or have any dietary restrictions, you will want to check the source carefully, as there is currently no proven plant-based equivalent that replicates collagen itself, though a nutrient-rich plant-based diet can still support your body's own production well. If you take other supplements or medications, or have any underlying health conditions, it is worth checking with your GP or pharmacist before adding a new supplement, just to be safe.
My general view is that a food-first approach, built around a varied, protein-rich diet with plenty of vitamin C, zinc and copper, is the safest and most sustainable starting point for most people, with a supplement considered as an addition on top of that foundation rather than a replacement for it. This is also an area where a personalised look at your overall diet can be more useful than a generic supplement recommendation, since the right approach really does depend on what you are already eating, your goals, and any dietary restrictions you have. Skin and joint health are also influenced by plenty of factors beyond diet alone, including sleep, hydration, sun protection and overall activity levels, so it is worth thinking about collagen as one piece of a much bigger picture rather than a single solution.
If you would like personalised support with collagen, skin and joint-supportive nutrition, I offer one-to-one online consultations. View my consultation packages or book a free discovery call to discuss how I can help.