If I can't use retinol,

what ingredients can replace it?

Beautys Doctor Director Wi Youngjin · Seoul National University-trained specialist

Check this before reading

Q. Are retinol alternatives ultimately

less effective than retinol?

A. The mechanism of action differs by ingredient.

Even without targeting the same receptor, collagen synthesis and

turnover promotion are still possible.

It's not that the effect is 'weaker'; it's just 'a different approach.'

Q. Why can't some people use retinol?

A. In people with a thin skin barrier or inflammatory skin conditions such as

rosacea or atopic dermatitis, retinol's irritation can

actually make things worse.

Its use is also restricted during pregnancy.

"When you can't use retinol,

ingredients with similar effects but less irritation"

— Director Wi Youngjin (Hongdae Beautystone Clinic)

Retinol: why is it so irritating?

If you boil down what retinol does in the skin,

it comes down to this.

It enters skin cells,

is converted into retinoic acid,

and this retinoic acid binds to RAR receptors in the cell nucleus,

changing gene expression.

It promotes collagen synthesis, accelerates keratinocyte turnover,

and inhibits melanin transfer.

Because this process is so powerful, from the skin's perspective

it is also quite a strong 'irritation signal.'

Especially due to the reactive oxygen species and

inflammatory response generated during the conversion process, peeling, redness, dryness,

and stinging almost inevitably occur at the beginning.

This is commonly called the 'retinol adaptation period,'

but honestly,

some skin just can't tolerate the adaptation period.

People with rosacea, people with a history of atopic dermatitis,

people with chronically damaged barriers, and people who are pregnant or breastfeeding.

In these cases, it's less that retinol is something you 'can't use'

and more that it's something you 'shouldn't use.'

Same destination, different route

— how alternative ingredients work

A common misunderstanding is that,

just because something is a retinol alternative,

it must be 'the same mechanism as retinol, just gentler.'

That's not true.

More precisely, these are ingredients that produce the 'result' retinol reaches

through different pathways.

Bakuchiol is a plant-derived ingredient,

and in cell studies it raises gene expression of collagen types I, III, and IV

to levels similar to retinol.

Because it does not directly stimulate RAR receptors

and instead induces collagen synthesis through other transcription-factor pathways,

retinol-like irritation is almost absent.

In a comparative study of 0.5% bakuchiol and 0.5% retinol

over 12 weeks, the degree of improvement in wrinkles and pigmentation

showed no statistically significant difference.

Director Wi Youngjin's key takeaway

A retinol alternative is not 'weak retinol.'

It's an ingredient that produces the same result

through a different signaling pathway.

Since it doesn't touch the RAR receptor, irritation is reduced,

and the results can be similar.

However, you should choose with the understanding that long-term data for retinol

is overwhelmingly more abundant.

Comparison of alternative ingredients by skin condition

In practice, ingredient combinations matter more depending on the goal.

If pigmentation is the main concern,

the combination of niacinamide and azelaic acid is best,

while if loss of elasticity is the main concern,

the combination of bakuchiol and peptides

comes closest to retinol used alone.

When home care alone reaches its limit

Whatever alternative ingredient you use,

the limits of cosmetics are clear.

Cosmetics are designed to penetrate only into the epidermal layer,

and collagen is made in the dermal layer beneath the epidermis.

If wrinkles are already deep or loss of elasticity is visible,

expecting one ingredient to solve it is

frankly a bit unrealistic.

In this case, combining procedures with home care

is the realistic approach.

Inducing collagen remodeling with lasers or radiofrequency procedures that directly stimulate the dermis,

then maintaining and supporting it with bakuchiol or

peptides on top, is the most efficient structure.

Frequently asked questions

Q1. Can bakuchiol be used during pregnancy?

Yes. Because it is not a vitamin A derivative and does not carry a risk of birth defects,

it is classified as usable during pregnancy and breastfeeding.

However, a small patch test first is recommended.

Q2. Do alternative ingredients have an adaptation period too?

Bakuchiol, niacinamide, and peptides can usually be used

right away without an adaptation period.

Azelaic acid may sting a little at first.

Q3. How long does it take to see results?

With bakuchiol, you need to use it consistently for at least 8 to 12 weeks

to feel the change.

The pace of noticeable results may be a little slower than retinol.

KakaoTalk consultation before your visit is also available.

This has been Wi Youngjin.

Also read

▶Why does the bridge of the nose get thicker after a nose filler?

▶Botox side effects: we clearly separate 'normal reactions' from 'when you should go to the hospital'

▶7 precautions for male Brazilian laser treatment, be sure to check before the procedure [Seoul National University specialist]

▶Double chin fat-dissolving injection (DCA) vs Ulthera: [whether it's excess fat or loss of elasticity]

▶My cheeks sank after chin Botox — why did that happen?