What is Vitamin A and Why Your Skin Needs It

The most researched skincare ingredient of the last 50 years — and most people still aren't using it correctly.

Your Skin Was Designed to Run on Vitamin A

Vitamin A isn't a trend. It's a biological requirement. Every cell in your skin has receptors specifically designed to receive vitamin A — and when those receptors are activated, your skin does what it was built to do: produce collagen, regulate cell turnover, repair damage, and maintain a healthy barrier.

The problem? Daily life depletes it. UV exposure, pollution, and simply being alive breaks down your skin's vitamin A reserves faster than most people can replenish them. The result is what dermatologists call "vitamin A deficiency skin" — and it looks like premature ageing, uneven texture, congestion, and a dull, tired complexion.

What Vitamin A Actually Does at a Cellular Level

When vitamin A (in its active form, retinoic acid) binds to receptors in your skin cells, it directly influences gene expression. In plain terms: it tells your skin cells how to behave.

Specifically, it:

• Stimulates fibroblasts to produce collagen and elastin
• Accelerates cell turnover, pushing fresher cells to the surface faster
• Regulates sebum production, reducing congestion
• Supports DNA repair after UV damage
• Strengthens the skin barrier by normalising cell differentiation

No other cosmetic ingredient has this level of peer-reviewed evidence behind it. Vitamin A has been studied since the 1960s, and the science only gets stronger.

Why Most People Are Deficient in Topical Vitamin A

Here's what most skincare brands won't tell you: the vitamin A in your moisturiser is almost certainly not reaching the cells that need it.

Vitamin A is inherently unstable. It degrades rapidly when exposed to light, air, and heat. Many over-the-counter products contain such low concentrations — or use forms so poorly absorbed — that the skin receives little to no benefit.

Add to that the fact that UV exposure destroys vitamin A in the skin on a daily basis, and you begin to understand why even people with consistent skincare routines can still show signs of vitamin A deficiency.

Replenishing vitamin A topically requires the right form, the right concentration, and a delivery system that actually gets it into the skin.

Prescription Retinoids vs Cosmetic Vitamin A: What's the Difference?

This is where a lot of confusion lives.

Prescription retinoids (like tretinoin) deliver retinoic acid directly — the active form your skin uses. They work fast, but the trade-off is significant irritation, peeling, and sensitivity, particularly in the early weeks. They bypass the skin's natural conversion process, which is why they can be so aggressive.

Cosmetic vitamin A uses precursor forms — retinol, retinaldehyde, retinyl acetate, retinyl palmitate — that the skin converts into retinoic acid itself. This conversion happens gradually, which means results take longer but the skin tolerates the process far better.

For most people, especially those with sensitive or reactive skin, cosmetic vitamin A is not just the gentler option — it's the smarter one.

Why Environ Uses Retinyl Acetate Instead of Retinol

Environ's founder, Dr Des Fernandes, is one of the pioneers of vitamin A skincare. His formulation philosophy is built on one principle: the skin needs to be gradually conditioned to vitamin A, not shocked by it.

Retinyl acetate — the form Environ uses in its AVST (Avance Vitamin Step-Up) system — is a stable ester of vitamin A that the skin converts efficiently without triggering the inflammatory response that retinol and prescription retinoids often cause.

The key differences:

• Retinol converts to retinoic acid in two steps and is more likely to cause irritation
• Retinyl acetate converts in three steps, giving the skin more control over the process
• Retinyl acetate is more stable, meaning it remains active in the formula and on the skin longer

The result is a vitamin A experience that works — without the redness, flaking, and sensitivity that causes so many people to give up.

The Step-Up Approach: Why Starting Low Matters

Environ's AVST system starts at a low concentration of vitamin A and increases gradually across five levels. This isn't a marketing gimmick — it's based on the science of receptor upregulation.

When your skin hasn't been exposed to consistent vitamin A, the receptors are essentially dormant. Flooding them with a high concentration causes irritation. Starting low allows the receptors to wake up gradually, so by the time you reach higher concentrations, your skin is primed to use them effectively.

This is why Environ's results are long-term and cumulative — and why people who stick with the step-up system consistently report transformative changes in their skin over 6–12 months.

Ready to Start Your Vitamin A Journey?

At Celtic Spa Skincare, we work with Environ exclusively because we believe in the science behind it. Whether you're new to vitamin A or looking to optimise your current routine, we can guide you to the right starting point.

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