What you should know about collagen supplements
Collagen Supplements: Your Questions Answered
Collagen supplements have surged in popularity, and with that comes a lot of questions — and a fair amount of misinformation. Below are honest, evidence-led answers to the ones we're asked most, sticking to what the research actually supports rather than the marketing. For the full background, our complete guide to liquid marine collagen covers everything in depth.
How much collagen should I take a day?
Studied doses vary, commonly from a few grams up to around 10g daily depending on the goal — skin studies often use lower doses, while joint and connective-tissue research has used 10g or more. Kollo provides 10g (10,000mg) per sachet. There's no need to "build up" slowly for safety reasons, but it's sensible to follow the product's recommended dose. For more on this, see why 10g a day is the researched dose and whether 2000mg is enough.
When should I take collagen?
Here's a myth worth clearing up: you may have read that collagen must be taken on an empty stomach to avoid being "destroyed by stomach acid." There's no good evidence for that — your digestive system handles collagen peptides perfectly well with or without food. So take it whenever suits you; the best time is simply whenever you'll remember it consistently. (One nuance for active people: some research pairs collagen with vitamin C taken before connective-tissue-loading exercise.)
How should I take it?
Collagen comes as liquid, powder or capsules. A liquid sachet like Kollo can be taken straight, in water, or blended into a smoothie or juice. If you use a powder, mix it into water, juice or yoghurt. The format matters less than the fact it's hydrolysed — if you're comparing options, see liquid collagen vs powder and marine collagen peptides vs hydrolysed collagen.
Are there any side effects?
Collagen is generally well tolerated, but "natural" doesn't automatically mean suitable for everyone, so let's be accurate. Marine collagen is derived from fish, so anyone with a fish or shellfish allergy should avoid it. It's not suitable for vegetarians or vegans. And as with any supplement, if you're pregnant, breastfeeding, taking medication or managing a health condition, check with your GP first. It's also worth knowing what to avoid when taking collagen supplements to get the most from it.
Why am I not seeing results yet?
Patience is the honest answer here. Most clinical studies measure results after 8 to 12 weeks of consistent daily use, so it's normal not to see changes in the early weeks — skin and nails renew slowly. We'd gently flag that some older articles explain this with a claim that "the body prioritises collagen to your cartilage first, then your skin." That's a tidy story, but it isn't an established mechanism, so we won't repeat it. The accurate version is simpler: give it a full 12 weeks of consistent use before judging.
Is there a vegan collagen?
Not in the true sense. Collagen is an animal protein, sourced from the connective tissue, skin or scales of animals such as fish (marine collagen) or cattle. There are "vegan collagen-support" products that provide nutrients to support your body's own collagen production, but they don't contain collagen itself — so if you follow a plant-based diet, that's the honest distinction to be aware of.
When should you start?
Natural collagen production declines from the mid-twenties, so there's no single "right" age — many people start in their late twenties or thirties as a preventative habit, and others later. Our guide to what age to start taking collagen covers the thinking.
Quick Answers at a Glance
| Question | The honest answer |
|---|---|
| How much? | Commonly a few grams up to ~10g daily; Kollo is 10g |
| Empty stomach needed? | No — no good evidence; take it whenever you'll be consistent |
| How long for results? | Most studies measure at 8–12 weeks |
| Side effects? | Generally well tolerated; avoid with fish allergy; not vegan |
| Vegan collagen? | No true vegan collagen — only collagen-support products |
Featured Product
Premium Liquid Marine Collagen
10,000mg of clinically studied Naticol marine collagen daily - for visibly smoother, firmer, more hydrated skin in as little as 28 days.
Shop Now →The Bottom Line
The most common collagen questions have refreshingly simple, honest answers: take a studied dose consistently, don't worry about timing or empty stomachs, give it 8 to 12 weeks, and be aware it isn't suitable for everyone. Cut through the marketing and collagen is a straightforward supplement with genuine, if specific, benefits — mainly for skin, with promising support for joints and nails.
If you'd like to try it, Kollo's 10g daily sachet makes it easy. Our complete guide to liquid marine collagen has the detail, our collagen powder guide compares formats, and for women thinking about their wider routine in midlife, our women's wellness guide for over 40s ties it together.
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.
