Why Vitamin C is Your Skin's Most Underrated Supplement

The science of collagen, liposomal absorption, and why Altrient C is changing the conversation.

If you've ever wondered why your skin loses its bounce, its plumpness, its that-just-slept-for-ten-hours glow, the answer almost always comes back to one word: collagen.

Collagen is the most abundant structural protein in the human body. It forms the scaffolding beneath your skin, holds your cartilage together, reinforces your blood vessels, and weaves through your connective tissue like a web that keeps everything firm, flexible, and intact. Radiant, healthy skin is the visible result of collagen fibres that are structurally sound, well-maintained, and doing their job.

However, that scaffolding degrades over time, and most of us aren't doing enough to support it.

The collagen countdown

Collagen synthesis in the skin gradually declines with age, with studies commonly describing an average drop of about 1% to 1.5% per year from early adulthood onward.(1)That might not sound dramatic, but the effects are cumulative, and the skin shows it first. Fine lines deepen, elasticity softens. The skin begins to sit differently on the face, less taut, less supple, less alive.

This is indicative of a structural deficit more than just simply aging. Like any structural problem, the most effective solution isn't to patch over it from the outside, it's to support the foundations from within.

That starts with understanding what actually builds collagen in the body.

The crucial role of vitamin C in collagen formation

Vitamin C has a well-earned reputation for immune support, but its relationship with the skin goes far deeper than most people realise.

Vitamin C plays a key role in collagen synthesis. Specifically, it supports both the enzymatic stabilisation of collagen fibres and the activity of the fibroblast cells that produce them. More than just a supporting role, without adequate vitamin C, your body simply cannot build or maintain collagen properly. Proline and lysine, the two amino acids that give collagen its structure, need to be hydroxylated before the molecule holds together properly. That process can't happen without vitamin C, because of its role as an essential cofactor.

In other words: no vitamin C, no stable collagen.

How the body actually builds collagen

To understand why that matters, it helps to understand how collagen is made in the first place.

Collagen is not something you can eat and absorb whole. It is manufactured inside the body through a multi-step process that takes place inside specialised cells called fibroblasts.

Fibroblasts are connective tissue cells scattered throughout the dermis, the deeper layer of skin beneath the surface. Their primary job is structural maintenance: producing and organising the proteins that keep skin firm, cartilage cushioned, and blood vessel walls intact. When everything is working well, they are constantly laying down fresh collagen fibres and remodelling older ones.

The process begins inside the fibroblast itself. The cell assembles individual collagen molecules from amino acids, primarily proline and glycine, in a structure called the endoplasmic reticulum. At this stage the molecules are called procollagen, and they are not yet structurally useful. Certain modifications have to take place first.

This is where proline and lysine become critical. For procollagen to form a stable triple helix, specific proline and lysine residues must be hydroxylated. Without this modification, the molecule is unstable and cannot assemble properly into collagen fibres.

Once procollagen is hydroxylated, it is released from the cell, and processed by extracellular enzymes. Then it naturally assembles into collagen fibrils, which bundle together into fibres that help support the skin’s structural framework. Vitamin C is essential earlier in this pathway because it supports the hydroxylation of proline and lysine residues. (2) 

What vitamin C does inside the fibroblast

The enzymes that carry out hydroxylation, prolyl hydroxylase and lysyl hydroxylase, require vitamin C as a cofactor for optimal activity. Without adequate vitamin C, hydroxylation is impaired, procollagen is less stable, and collagen maturation is compromised.(3,4)

But vitamin C does more inside the fibroblast than support this single step. Research suggests it may also influence collagen-related gene expression and help support the production of the collagen types most important for skin structure.(3,4)

Collagen is not a single protein. It includes at least 28 distinct types, each with a different structure and role in the body. 

Type I is the most abundant collagen in skin and helps provide tensile strength and firmness.(5,6) Type III is produced alongside it and contributes to elasticity and suppleness.(5,6) These two types work together in the dermis, and their balance changes with age.(5,6)

There is also evidence that vitamin C may help protect collagen by supporting the body’s natural defence against collagen breakdown and oxidative stress. (3,4) Some collagen turnover is normal and necessary, but when oxidative stress and inflammation are high, breakdown can outpace repair. Vitamin C may help support the balance between collagen synthesis and degradation.(3,4)

So, in simple terms, vitamin C helps fibroblasts build stable collagen and may also help protect the collagen matrix from excessive breakdown.(3-7)

The wider picture

That’s not where vitamin C’s contribution ends, it's also an important antioxidant in skin, helping to protect cells and extracellular structures from oxidative stress caused by UV exposure, pollution, and normal metabolism. What’s more, it contributes to collagen stability indirectly by limiting oxidative damage that can accelerate collagen breakdown.

Vitamin C may help to regulate pigmentation too. It is commonly used in skincare for uneven skin tone and dark spots because it may help reduce excess melanin production, which plays a key role in pigmentation.(8) It also helps support the skin barrier by creating the right conditions for healthy skin repair and maintaining the lipids that keep skin strong and hydrated.

All three of those additional benefits, antioxidant protection, pigmentation regulation, and barrier support, depend on the same thing as collagen synthesis: vitamin C being present in sufficient concentration at the cellular level.

Why most collagen products are approaching skin elasticity backwards

Most people looking to address collagen loss reach for collagen drinks, collagen powders, or topical creams. The logic is understandable, but the science is less straightforward than the marketing suggests. Dietary collagen is broken down into amino acids during digestion like any other protein, it does not go straight to the skin. Topical collagen is mainly used as a moisturising/film-forming ingredient, and does not deliver intact collagen into the dermis where fibroblasts reside. 

The more science-backed approach is to support your body's own collagen-producing machinery, especially fibroblast function, vitamin C status, and overall protein and micronutrient adequacy. 

Supporting collagen where it starts

By giving the body what it needs to do the work itself, at the cellular level, you support the processes that help maintain healthy-looking skin over time. That means prioritising vitamin C intake in a form the body can absorb, as well as supporting fibroblast function with the nutrients it needs to build and maintain collagen.

It also means looking beyond marketing to the evidence that distinguishes a genuinely effective supplement from all the hype. The key question is not simply whether a product contains vitamin C, but whether it delivers the nutrient in a way that supports meaningful uptake and use.

Why absorption is everything

The body can be surprisingly reluctant to absorb nutrients in large doses all at once. With standard vitamin C tablets or capsules, absorption becomes less efficient as the dose increases, so more of the nutrient may be excreted rather than used. This is why formulation matters as much as dosage and where liposomal delivery may offer an advantage.

Liposomes are tiny lipid-based spheres that encapsulate nutrients, helping to protect them through digestion and support their delivery. Because they are structurally similar to human cell membranes, it helps the nutrients to move through the gut wall into the bloodstream more easily. 

Overall, liposomal delivery is intended to improve delivery and tolerability.It's a fundamentally different kind of bioavailability that doesn’t have to rely on cofactors and dosage.

The Altrient C difference

Altrient liposomal vitamin C was evaluated in an independent clinical study, with results showing a significant improvement in skin firmness and elasticity, increasing by 61% over 12 weeks. This makes it a compelling example of how a well-formulated vitamin C supplement may help support skin structure from the inside out.

What appears to matter most is not just the vitamin C itself, but the delivery system behind it. The study suggests that Altrient C’s specific liposomal formulation was associated with measurable skin benefits within the timeframe of a standard skincare trial. While the results of one product cannot automatically be applied to every vitamin C supplement, they do highlight how formulation and bioavailability can influence effectiveness.

The proposed mechanism behind these results is the combined biochemical action of high-dose, well-absorbed vitamin C working alongside Altrient’s patented liposomal delivery technology. 

In other words, the real advantage of vitamin C supplementation may depend not only on the nutrient itself, but on how efficiently it reaches the cells that need it most. When delivered effectively, vitamin C is better able to support collagen production, help protect skin structure, and contribute to a healthier-looking complexion.

REFERENCES

1. Myung S, Park Y. Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
   The American Journal of Medicine, 2025; 138, 1264-1277

2. Boyera N, Galey I, Bernard BA. Effect of vitamin C and its derivatives on collagen synthesis and cross-linking by normal human fibroblasts. Int J Cosmet Sci. 1998 Jun;20(3):151-8. doi: 10.1046/j.1467-2494.1998.171747.x. PMID: 18505499. 

3. Prockop DJ, Kivirikko KI. Collagens: molecular biology, diseases, and potentials for therapy. Annu Rev Biochem. 1995;64:403-434. doi:10.1146/annurev.bi.64.070195.002155 (1)

4. Pullar JM, Carr AC, Vissers MCM. The roles of vitamin C in skin health. Nutrients. 2017;9(8):866. doi:10.3390/nu9080866 (2)

5. Savini I, Catani MV, Rosini F, et al. Vitamin C and collagen synthesis: a review. Int J Cosmet Sci. 2013;35(3):245-252. doi:10.1111/ics.12024 (3)

6. Ricard-Blum S. The collagen family. Cold Spring Harb Perspect Biol. 2011;3(1):a004978. doi:10.1101/cshperspect.a004978 (4)

7. Gelse K, Pöschl E, Aigner T. Collagens—structure, function, and biosynthesis. Adv Drug Deliv Rev. 2003;55(12):1531-1546. doi:10.1016/j.addr.2003.08.002 (5)

8. Sanadi RM, Deshmukh RS. The effect of Vitamin C on melanin pigmentation - A systematic review. J Oral Maxillofac Pathol. 2020 May-Aug;24(2):374-382. doi: 10.4103/jomfp.JOMFP_207_20. Epub 2020 Sep 9. PMID: 33456250; PMCID: PMC7802860.