What to Avoid When Taking Collagen Supplements
What to avoid when taking collagen supplements
Taking a marine collagen supplement every day is a good habit. But several common mistakes can significantly reduce how much benefit you actually get from it. Some of these mistakes are obvious, others are less well known. Here is a comprehensive guide to what to avoid when taking collagen — and what to do instead.
1. Taking too little collagen
Many people take collagen at doses far below what clinical research uses and then wonder why they don't see results. The peer-reviewed research on collagen supplementation consistently uses doses of 5,000 to 10,000mg of hydrolysed collagen peptides per day. Products delivering 1,000 to 2,000mg per serving are unlikely to produce the improvements in skin, joints or hair that the research demonstrates.
You can read more about what the evidence says about dosing in our complete guide to collagen dosing. The short version: 10,000mg per day is the optimal dose for most people. Kollo delivers exactly 10,000mg of Naticol® marine collagen in every daily sachet.
2. Being inconsistent
Collagen supplementation works cumulatively. The body rebuilds collagen structures gradually over weeks and months of consistent amino acid availability. Missing doses regularly disrupts this process and significantly slows the rate at which results develop.
The most effective approach is to build collagen into a fixed daily routine - the same time every day, alongside something you already do consistently. Morning coffee, breakfast, or a consistent evening routine all work well. Consistency matters more than the specific time of day.
3. Expecting results too quickly
Collagen produces results - but not overnight. Understanding the realistic timeline helps you stick with it long enough to see the benefits:
- Nails: improvements in strength and growth rate typically within 2 to 4 weeks
- Skin hydration and texture: 4 to 8 weeks of consistent supplementation
- Visible reduction in fine lines and improved elasticity: 8 to 12 weeks
- Joint comfort and mobility improvements: 12 to 16 weeks
- Bone density improvements: 12 months of consistent supplementation
The full clinical timeline is covered in our complete guide to how long collagen takes to work.
4. Mixing with certain foods and drinks
Certain substances can interfere with protein absorption when consumed at the same time as your collagen supplement:
- High-tannin drinks like coffee and tea can bind to proteins and reduce absorption
- Very high-fibre foods consumed simultaneously may slow protein uptake
- Alcohol interferes with protein synthesis and collagen production generally
- High sugar intake promotes glycation — a process that actively degrades collagen throughout the body
You do not need to avoid these things entirely. Simply leave a 30-minute gap between your collagen supplement and coffee or tea. Sugar is the more significant long-term concern - a diet high in refined sugar accelerates collagen breakdown regardless of how much you supplement.
5. Not pairing with Vitamin C
Vitamin C is an essential co-factor for collagen synthesis. Without adequate Vitamin C, the enzymatic processes that convert collagen peptides into new collagen fibres cannot function properly. Many people supplement with collagen but are deficient in Vitamin C, which limits the effectiveness of every dose they take.
Choose a collagen supplement that already includes Vitamin C — Kollo includes it in every sachet alongside a full B vitamin complex specifically to ensure this co-factor is always present when the collagen peptides arrive.
6. Choosing poor quality collagen
Not all collagen supplements are equivalent. Lower-quality products can contain contaminants from intensive farming or aquaculture practices, including heavy metals, antibiotics and growth hormones. Taking a contaminated product every day for months represents a genuine risk that has nothing to do with the collagen itself.
What to look for in a high-quality collagen supplement:
- Informed Choice or Informed Sport certification — independently tested for 250 potentially harmful substances
- Named, patented collagen ingredient — such as Naticol® — with its own clinical research
- Transparent sourcing — sustainably certified fisheries or responsible farms
- Enzymatic hydrolysis — clean extraction with no harsh chemicals
- No added sugars or unnecessary artificial additives
7. Using topical collagen products expecting internal benefits
Collagen molecules are too large to penetrate the skin barrier. Native collagen has a molecular weight of approximately 300,000 Daltons - even hydrolysed collagen peptides come in at 3,000 to 6,000 Daltons. The skin only allows molecules under 500 Daltons to pass through. This means collagen creams, serums and shampoos cannot deliver collagen to your cells regardless of what they claim.
For hair, skin, joint and nail benefits, collagen needs to be taken orally. You can read more about this in our guide to collagen hair products.
8. Lifestyle factors that counteract collagen
Even with a perfect supplement routine, certain lifestyle factors actively degrade collagen faster than you can replace it:
- Smoking reduces Vitamin C absorption and creates oxidative stress that damages collagen directly
- Excessive sun exposure breaks down existing collagen and inhibits new production
- Chronic stress elevates cortisol which suppresses collagen synthesis
- Poor sleep — collagen production peaks during deep sleep phases
- High sugar diet — glycation cross-links and stiffens collagen throughout the body
9. Not considering medication interactions
If you take regular prescription medication - particularly blood pressure medication, blood thinners or thyroid medication — it is worth checking with your GP before starting collagen supplementation. There are no widely documented serious interactions, but the high protein content of collagen supplements can theoretically affect certain medications. Read our complete guide to collagen and medications for the full details.
10. Taking the wrong form for your goals
Marine collagen is predominantly Type I — the most abundant type in human skin and connective tissue. It has smaller peptides than bovine alternatives and up to 1.5 times the bioavailability. For skin, hair and nail goals, marine collagen is the strongest choice. For joint health specifically, combining collagen with targeted anti-inflammatory support through Kollo Flex+ addresses both the structural and inflammatory components of joint pain simultaneously.
For women in perimenopause or menopause, when collagen loss accelerates significantly, our complete guide to menopause supplements and guide to the best supplements for women over 40 explain how collagen fits into a broader daily routine.
Kollo Health was co-founded by Jenni Falconer - TV presenter, Smooth Radio breakfast host, ten-time London Marathon runner and host of the RunPod podcast. Read her story and why she created Kollo.
