Collagen supplements have exploded in popularity over the past few years, and for good reason. Collagen is the most abundant protein in the body, playing a vital role in keeping our skin firm, plump, and resilient. But as we age, our natural collagen production starts to decline, often beginning in our mid-20s and accelerating into our 30s and 40s. This can lead to thinner, more fragile skin, fine lines, and a general loss of that youthful bounce.

Enter collagen supplements: an easy, accessible way to support skin health from the inside out. But with so many powders, drinks, and capsules on the market, how do you know which ones are actually worth your time and money? Not all collagen supplements are created equal, and some offer very little in terms of real results. Here’s what I recommend looking for to ensure you’re choosing a supplement that truly delivers.

Hydrolysed collagen peptides (and why they matter)

When shopping for a collagen supplement, the form of collagen used is key. You want to look for hydrolysed collagen peptides, sometimes referred to as collagen hydrolysate. This is collagen that’s been broken down into smaller, more absorbable fragments, making it easier for your body to actually use. Large, intact collagen molecules are too big to be absorbed efficiently through the gut, which means they’re broken down into their component parts prior to being absorbed and therefore they’re less likely to make a difference to your skin. Hydrolysed peptides, on the other hand, have been shown in studies to stimulate the skin’s fibroblasts—the cells responsible for collagen and elastin production. This is where you get that meaningful boost in skin elasticity, hydration, and texture.

Clinically proven doses and ingredients

It’s not just about what is in your supplement, it’s about how much. Many products contain collagen in tiny doses that are unlikely to make any noticeable difference. I always recommend looking for supplements that have been clinically studied, with proven dosages of collagen peptides, usually between 8 and 15 grams per day, depending on the specific formulation and goal. Products with doses as low as 2.5g maybe effective, but above 8g we know the results are more tangible.

It’s also worth noting that some of the best supplements include supporting ingredients like vitamin C, which is essential for collagen synthesis. Others may include hyaluronic acid for hydration, zinc for skin healing, or antioxidants to help protect against collagen breakdown. It’s the synergy of these ingredients that often enhances the results.

Type I and Type III collagen for skin benefits

There are multiple types of collagen in the body, but for skin health, Type I and Type III are the ones to look for. Type I makes up around 80% of your skin’s dermis and provides structure and strength, while Type III is found alongside it and contributes to skin elasticity and firmness.

Some supplements also include Type II, which is beneficial for joint health, but if your main concern is skin appearance, you want a product focused on Type I and III. This distinction is often overlooked, but it’s important if your goal is smoother, firmer, healthier skin.

A source that your body can absorb

Collagen can be derived from various sources, most commonly bovine (cow), marine (fish), and sometimes porcine (pig). Bovine and marine collagen are both excellent sources of collagen. Bovine has an added benefit of helping to improve bone density, which is as yet not proven from marine sources. Both are well absorbed and well evidenced with clinical research.

That said, quality and purity matter just as much as the source. Look for sustainably sourced, clean collagen that’s free from unnecessary fillers, sugars, and artificial additives. If a product doesn’t list where its collagen is sourced from, that’s usually a red flag.

Realistic expectations and consistency

One of the most important things to understand about collagen supplements is that they’re not an overnight fix. Collagen production is a slow, gradual process, and just like with any skincare or treatment plan, consistency is key. In most studies, participants take collagen daily for at least 8 to 12 weeks before significant improvements in skin elasticity and hydration are noted.

If you’re going to invest in a collagen supplement, make sure you’re committed to taking it regularly and giving it time to work. The results are subtle at first, perhaps a glowier complexion, better skin texture, but they build over time. Think of it as long-term maintenance for your skin health, not a quick fix.

My favourite supplement boosters

When used consistently and chosen wisely, a good collagen supplement can be a brilliant addition to your skin health routine. But the difference between a high-quality formula and a low-impact one often comes down to the details – source, dosage, type, and absorption all play a role.

In clinic, I often recommend collagen supplements alongside treatments like biostimulators, skin boosters, or medical-grade skincare to support the skin from all angles, inside and out.

Two of my go-to collagen supplements that I’ve seen deliver excellent results are EverNutri Evercol and Absolute Collagen. Both are high-quality, well-formulated, and designed to be easily absorbed by the body, making them a great choice if you’re serious about supporting your skin from within.

Remember: collagen support isn’t just about looking good – it’s about strengthening your skin’s foundation for the long term. The earlier you start, the more your future self will thank you.