Antioxidant

Retinal (Retinaldehyde)

The direct precursor of retinoic acid — retinal (retinaldehyde) is 11 times more effective than retinol and is significantly gentler. One step to the active form (RA) without the slow enzymatic chain of retinol.

retinoidanti-agingacneretinol+

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Retinal (retinaldehyde, Vitamin A aldehyde) — an intermediate form of vitamin A between retinol and retinoic acid (RA). Conversion chain: retinol → retinal → retinoic acid (RA). RA — the active form that binds to RAR receptors. Retinal requires only one enzymatic step to RA (retinaldehyde dehydrogenase), unlike retinol (two steps). Result: higher bioavailability of RA with less irritation compared to direct RA (tretinoin). In INCI: Retinaldehyde or Retinal.

Serums and night products for anti-aging and acne. Effective in concentrations of 0.05–0.1%. Use in the evening, with SPF during the day. Brands: Darphin, Medik8, Naturium.

Key Benefits

✦

11 times more effective than retinol with less irritation

Comparative study by Creidi et al.: retinal 0.05% > retinol 0.05% in terms of stimulating collagen synthesis and reducing wrinkles after 44 weeks of use. Smaller conversion "queue" — higher level of RA in tissues. But unlike direct RA (tretinoin), retinal has a buffered effect.

◈

Stimulation of collagen, restoration of texture, and reduction of wrinkles; RA activates RAR receptors in fibroblasts → stimulation of pro-collagen I, III synthesis → increased density and elasticity. Simultaneously increases cellular turnover of the epidermis — smoother texture, smaller pores, even tone.

✧

Antibacterial action in acne — unique to retinal

Retinal has a direct antibacterial effect against C. acnes unlike retinol. In vitro: retinal 0.005% completely inhibits the growth of C. acnes — the effect does not depend on conversion to RA. Double mechanism in acne: normalization of keratinization (via RA) + direct antibacterial action.

Suitable for

mature skinacne-prone skinnormal skin

Main Actions

✓ stimulation of collagen and cellular turnover✓ anti-aging effect✓ acne treatment

Retinoids: hierarchy of effectiveness

Retinyl palmitate < Retinol < Retinal < Retinoic acid (tretinoin, Rx). Retinal — the optimal balance: more effective than retinol, but does not require a prescription. Tretinoin — prescription, most effective, but causes the most irritation. For beginners with retinoids: retinol → then retinal. For experienced users — retinal as OTC maximum without Rx.

CategoryAntioxidants

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