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Collagen is the most abundant protein in the human body, making up about 30% of all protein content. It’s the essential building block for skin, joints, bones, muscles, tendons, and even hair and nails. However, after the age of 25, collagen production begins to decline — leading to signs of ageing, joint discomfort, and slower recovery.
Collagen supplements are designed to replenish your body’s natural collagen stores, often in the form of powders, capsules, or liquids, making it easier to support your health from the inside out.
Whether you’re into skincare, fitness, or healthy aging — collagen has something for everyone:

There are 28 types of collagen, but the majority of supplements focus on five key types:
Note: Most collagen supplements contain hydrolyzed collagen peptides, which are broken down for better absorption.
Collagen supplements are particularly beneficial for:
Adults 25+ – As natural collagen production slows.
Women 35+ – To support skin, hair, and joints during aging or hormonal changes.
Athletes & gym-goers – To promote joint recovery and muscle support.
People with joint pain or arthritis
Those with weak nails, thinning hair, or skin concerns
When it comes to collagen supplements, quality matters. That’s why we recommend Osavi Collagen — a trusted, scientifically-backed brand available now at FitandFat.co.uk.
| Pros | Cons |
| Improves skin elasticity & reduces wrinkles | Not suitable for strict vegans (unless plant-based alternative) |
| Supports joints and bone strength | Results can take 4–8 weeks to show |
| Strengthens hair & nails | Some may experience bloating |
| Aids in workout recovery | Not all supplements are created equal – quality matters |
| Helps improve gut health | Needs consistent daily intake for best results |
Most people notice results from collagen supplements within 4 to 12 weeks, depending on age, lifestyle, and diet. Consistency is key. The Osavi formula is designed for daily use, making it easy to integrate into your routine.