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 current evidence is suggesting that 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. Research confirms that taking collagen every day for best results is essential — 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. Not ensuring adequate Vitamin C intake
Vitamin C plays an important role in your body's own collagen synthesis processes. While current evidence suggests that taking vitamin C alongside collagen supplementation may not be strictly essential for the supplement itself to work, vitamin C is crucial for your body's natural collagen production.
If you're going to choose a collagen supplement, opting for one that includes vitamin C offers additional benefits beyond the collagen peptides alone. Kollo includes vitamin C in every sachet alongside a full B vitamin complex to support your body's natural collagen synthesis processes and overall wellness.
5. 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
6. 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.
7. 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
*Evidence for the relationship between sleep and collagen production is emerging
8. 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 is almost no direct clinical data about specific drug interactions with oral collagen supplements (most interaction concerns relate to herbal supplements), 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.
9. 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 shows the strongest evidence. 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.
Does Coffee or Heat Destroy Collagen?
This is a common worry, and the reassuring answer is that adding collagen to a hot drink like coffee or tea won't destroy it. Hydrolysed collagen is already broken down into small peptides, and normal drink temperatures don't undo that. The one caveat is prolonged, very high heat, so stirring collagen into your coffee is fine, but you wouldn't want to boil it hard for a long time.
Foods and Drinks That Reduce Collagen Production
No single food "cancels out" a collagen supplement, but some habits work against your body's own collagen over time. Diets very high in sugar and refined carbs are linked to processes that can damage collagen, and heavy alcohol and smoking are associated with reduced collagen and faster skin ageing. Supporting collagen is as much about the overall diet and lifestyle as the supplement itself.
Can You Take Too Much Collagen?
Collagen has a good safety profile and is generally well tolerated, even at the higher doses used in studies. Taking more than needed is unlikely to be harmful for most healthy people, but it also won't speed up results, so there's little point exceeding a sensible daily amount. If you experience digestive discomfort, lowering the dose usually helps.
Frequently Asked Questions
What should you avoid when taking collagen?
The main things are underdosing, inconsistency, and expecting overnight results. Avoid assuming a supplement replaces a good diet, and if your product contains added ingredients, avoid unknowingly doubling up with other supplements. Consistency at a meaningful dose matters most.
Can you put collagen in hot coffee or tea?
Yes. Hydrolysed collagen is already broken down and stirring it into a normal hot drink won't destroy it. The only thing to avoid is prolonged, very high heat, but standard coffee or tea temperatures are absolutely fine.
What foods stop collagen absorption?
No specific food blocks collagen absorption, as it's digested like other protein. Over time, though, diets very high in sugar and heavy alcohol can work against your body's own collagen, so overall eating habits matter alongside any supplement.
Can you take too much collagen?
Collagen is generally well tolerated, and higher doses used in studies are considered safe for most healthy adults. Taking more than needed won't improve results and may cause mild digestive discomfort, so a sensible daily amount is best.
Why is my collagen not working?
Common reasons include too low a dose, inconsistent use, or not giving it enough time, as changes often take weeks to months. Diet, age and lifestyle also play a part. Collagen supports the body rather than guaranteeing specific results.
Should you take collagen on an empty stomach?
There's no strong evidence you must take collagen on an empty stomach. It's absorbed whether or not you've eaten, so the best time is simply whenever you'll take it consistently. Choose the routine you'll actually stick to.
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.
