Retinal
INCI: Retinaldehyde
Retinaldehyde sits one conversion step closer to active retinoic acid than retinol does, which makes it noticeably faster-acting — closer to a prescription retinoid's results without the prescription. It carries the same core rules as any retinoid: PM only, a real introduction ramp, and no acids or benzoyl peroxide the same night.
How it works
A vitamin A aldehyde one conversion step closer to active retinoic acid than retinol, giving faster keratinocyte turnover and sebaceous normalization at a comparatively lower irritation threshold than prescription retinoids.
In practice, someone who has already built tolerance to retinol and plateaued on results is the typical candidate for stepping up to this rather than starting here.
How to introduce it
Wait about 20 minutes before the next step. Judging Retinal before week 12 means judging it before it's had time to actually work — most of what reads as "this isn't doing anything" in the first couple of weeks is just too early to tell.
Possible purging window: weeks 2–6 — temporary increased breakouts as turnover speeds up, not a sign to stop. A purge shows up as small whiteheads in areas you already tend to break out, and settles down on its own within that window. That's different from a bad reaction, which shows up as redness, burning, or swelling in places you don't normally break out, doesn't improve with time, and is a reason to stop — see below.
- Patch test on the inner forearm 48 hours before first facial use.
- PM only — never apply under sunscreen or in daylight.
- Sunscreen is mandatory every morning after any retinoid night, no exceptions.
- Never combine with AHA, BHA, or benzoyl peroxide in the same session.
- Do not apply to broken, sunburned, or actively irritated skin.
- Buffer with moisturizer underneath if stinging occurs — do not stop the ramp on the first uncomfortable night.
- — Stinging or redness lasting more than 60 seconds after 3+ uses.
- — Visible peeling beyond light, dry flaking.
Who should be careful
Retinal is rated moderate risk. Patch test on your inner forearm 48 hours before first facial use, especially if your skin reacts easily to new products.
Don't combine with
Same-night use can irritate skin or cancel out the active — alternate nights instead of layering them together.
Common in these product forms
Among the products Skinzy tracks in India that contain Retinal, it most often shows up as a serum.
Questions people ask
A faster, stronger over-the-counter retinoid than retinol — quicker results, but the same careful introduction rules apply.
Most people see a fair result around 12 weeks of consistent use — judging earlier usually means judging too soon.
At night. Retinal is intended for PM use.
Retinal shouldn't share a routine step with: Salicylic Acid, Glycolic Acid, Lactic Acid, Mandelic Acid, Benzoyl Peroxide.