Retinoids 101: What Dermatologists Want You to Know

Retinoids are one of the few skincare ingredients with genuine consensus behind them, and also one of the most confusing to shop for. Retinol, retinaldehyde, tretinoin, adapalene: all sit under the same umbrella, but they are not interchangeable, and the difference matters for how your skin reacts.

What retinoids actually do

According to the American Academy of Dermatology, retinoids work by speeding up the turnover of surface skin cells and boosting collagen production underneath, which is why they show up so often in conversations about fine lines, uneven tone, and mild acne scarring. Tretinoin, the prescription-strength option, was first approved by the FDA as an acne treatment back in 1971, and its cosmetic benefits were noticed as a side effect of that original use.

Retinol, the over-the-counter version most people encounter first, is a milder precursor that the skin has to convert into its active form, which is part of why it takes longer to show results but tends to be gentler to start with.

Where most people go wrong

The most common mistake is not choosing the wrong product, it is introducing it too aggressively. Retinoid-related irritation, redness, flaking, and a burning sensation, is common enough that a large portion of dermatological literature is dedicated specifically to reducing it, largely through gradual introduction, buffering with moisturiser, and limiting frequency at the start rather than stopping altogether.

The AAD is also clear that not everyone is a good candidate. People with pre-existing skin allergies, very dry or reactive skin, or those who are pregnant should discuss retinoid use with a professional before starting, rather than assume a product marketed as gentle is automatically safe for them.

How VEGNA approaches it

In consultation, we treat retinoid strength as a dial, not a switch. Most clients start on a lower frequency, build tolerance over several weeks, and only step up strength once the skin has clearly adjusted. It is a slower path to results, but it is the one that actually works without a month of visible irritation in between.