Retinol vs Retinal vs Tretinoin: Pick One Already

# Retinol vs Retinal vs Tretinoin: Pick One Already

Every beauty shopper eventually runs into the retinoid wall: three products at three prices with three ingredient names that all mean vitamin A. Here is the structural difference in 90 seconds, then the practical flowchart.

The biochemistry in one paragraph

Vitamin A in skincare works by converting (in the skin) to retinoic acid — the only form skin actually uses. Retinol takes two conversion steps. Retinal takes one step. Tretinoin IS retinoic acid — zero conversions. Fewer steps = more potency but also more irritation.

• Retinol → retinaldehyde → retinoic acid
• Retinal (retinaldehyde) → retinoic acid
• Tretinoin (retinoic acid) → already active

The potency hierarchy

| Form | Strength | Prescription? | Where to buy |

|---|---|---|---|

| Tretinoin | Strongest, about 20× retinol | Yes (everywhere except Mexico/Brazil OTC) | Dermatologist |

| Retinal | About 11× retinol | No | Avène, Medik8, Geek & Gorgeous |

| Retinol | Baseline | No | The Ordinary, Paula's Choice, Sunday Riley |

The practical flowchart

Q: Have you ever used a retinoid?

NEVER → Start with retinol (The Ordinary 0.2% in Squalane, €6). Three nights a week for two months.

YES, TOLERATED FINE → Move to retinal (Medik8 Crystal Retinal 3, about €55). Every other night for one month, then nightly.

YES, PLATEAUED → Go to tretinoin (0.025% prescription) via dermatologist.

The speed-vs-tolerance tradeoff

• Retinol: Slowest, gentlest. Results visible at 3–6 months. Rarely irritates.
• Retinal: Middle ground. Results at 2–4 months. Some flaking in the first 2 weeks is normal.
• Tretinoin: Fastest. Results at 6–12 weeks. Will almost certainly cause flaking, peeling, redness in the first 4–6 weeks (the "retinol uglies" are just "tretinoin uglies" on fast-forward).

The common confusions

• "Retinyl Palmitate" is NOT retinol. It's a weaker ester that requires 3 conversion steps. Skip it.
• "Bakuchiol" is NOT retinol. It's a plant extract with some retinoid-like activity, but dramatically weaker. Useful for retinoid-intolerant skin, not a direct substitute.
• "Granactive Retinoid" (The Ordinary): Hydroxypinacolone retinoate. Similar to retinal in potency. Solid.

The pregnancy rule

No retinoids during pregnancy or breastfeeding. This includes retinol, retinal, and definitely tretinoin. If you're not sure — ask your doctor, use bakuchiol or niacinamide instead.

The single most important retinoid tip

Use SPF daily. Every retinoid increases photosensitivity. Skipping sunscreen while on retinoids undoes the anti-aging work AND increases skin-cancer risk.

Second tip: Slather a thick moisturiser on top of every retinoid application. Your barrier will thank you.

Pick-one cheat sheet

• Under €10 budget: The Ordinary Retinol 0.2% in Squalane
• Mid-tier actives-first: Medik8 Crystal Retinal 3
• Premium experience: Avène RetrinAL 0.1% or Sunday Riley A+
• Strongest available: Tretinoin 0.025% (prescription)

Pick ONE. Use it nightly (or every-other-night) for three months before evaluating. Do not stack retinoids with other actives for the first eight weeks. Moisturise aggressively. Wear SPF. That is the whole game.