Why Collagen Needs Vitamin C (and What Actually Works)
By Abhi Wadhwa, Co-founder, EX1
Vitamin C is what your body uses to form collagen. Here is why marine collagen is paired with it, and what Type I and III peptides do for skin.
Marine collagen is collagen sourced from fish, rich in Type I peptides. Hydrolysed into small peptides, it is the form used in most skin and beauty research.
Why dose and peptide size matter
Two numbers are worth checking on any collagen: the daily dose and the peptide size. Randomised trials in journals including the Journal of Cosmetic Dermatology, Nutrition Research, and Dermatology and Therapy have studied hydrolysed collagen peptides across roughly 2.5 to 10 grams a day, several within combination formulas, reporting improvements in skin hydration and elasticity. Hydrolysis breaks collagen into small peptides the gut can absorb.
Peptide size is the second gate. Hydrolysis breaks collagen into small peptides the gut can absorb and use, which is the point of taking it at all. Type I and III together reflect the collagen types most abundant in skin, which is why a skin-focused source names both. Where the studies land on dose is a range, not a single number, and an honest label states its own dose so you can weigh it against that range yourself.
The vitamin C connection
Your body cannot build its own collagen without vitamin C. That is established nutrition, and it is why a well-built collagen product includes vitamin C rather than leaving it out. Vitamin C contributes to normal collagen formation for the normal function of skin. The peptides supply raw material; the vitamin C supports your body's own synthesis.
This pairing is a genuine one, not a marketing add-on. Collagen peptides give the body building blocks, and vitamin C is a cofactor the body uses to assemble them into its own collagen.
Frequently asked
How much marine collagen do studies use? Skin research commonly studies around 2.5 to 10 grams a day, often within combination formulas.
What does Type I and III mean? They are the collagen types most abundant in skin. A skin-focused marine collagen names both.
Why include vitamin C? Because the body needs vitamin C to form collagen. It is a genuine pairing, not a marketing add-on.
The EX1 take. EX1 Marine Collagen is formulated at 10 grams of hydrolysed Type I and III peptides per serving, a formulation choice stated plainly so you can weigh it against the studied range yourself. It is paired with vitamin C, which contributes to normal collagen formation for the normal function of skin. The full dose declared. The peptide types named. Per-batch tested.