Are peptide skincare products safe during pregnancy?

Peptides are one of the few active ingredients you can continue through pregnancy and breastfeeding. What is less often explained is why they are suitable for use and what they can be expected to do. 

Are peptides pregnancy safe?

Peptides applied to the skin are considered appropriate for use throughout pregnancy and while breastfeeding. They are not on any pregnancy avoidance list and pregnancy services in Australia do not flag them for caution.³

The general principle for skincare in pregnancy is that ingredients applied to the skin act locally and reach the bloodstream in very small amounts. The recognised exceptions are hydroquinone, which is absorbed at a relatively high rate, and the retinoids, which are avoided on the basis of what oral vitamin A can do.¹˒² If you want the full picture of what to avoid, start with reading our guide to skincare ingredients to avoid during pregnancy.

Peptides sit outside that list. They are also not a foreign material. Peptides are short chains of amino acids, the same building blocks your body already uses to make its own proteins, including collagen.⁵

One point of confusion is worth clearing up. The peptides discussed here are cosmetic ingredients in a serum or cream. They are not the same thing as oral peptide supplements or injectable peptide therapies, which are a separate question for your healthcare provider.

What peptides do, and what the evidence shows

Peptides signal the skin to behave differently and the evidence for them is real but modest.

What are peptides in skincare?

Peptides are short chains of amino acids that act as messengers, telling skin cells to carry out a specific job.

They are usually grouped by the message they send. Signal peptides encourage skin cells to produce more collagen. Carrier peptides deliver trace minerals such as copper to where they are used. Neurotransmitter inhibitor peptides soften the muscle signalling behind expression lines. Enzyme inhibitor peptides slow the breakdown of collagen already there.⁵

The one you will see most often in skincare is acetyl hexapeptide-8, sometimes called argireline. It sits in the neurotransmitter inhibitor group and is used to soften fine expression lines.⁶

The important thing to understand is that a peptide does not force a change. It asks for one. This is why peptides are gentle and why they suit skin that has become more reactive during pregnancy.

Do peptides get into the bloodstream?

Peptides are poorly absorbed through the skin, which is precisely why systemic exposure is not a realistic concern.

Skin absorption is largely governed by molecular size. The widely used benchmark is that a compound needs to be under about 500 daltons to cross the outer skin layer in meaningful amounts.⁴ Most cosmetic peptides are well above that.

Acetyl hexapeptide-8 weighs roughly 889 daltons and is water-loving, while the outer skin layer is built to repel water. Reviews of its permeability describe delivery through intact skin as the central formulation challenge, not something that happens easily.⁶

In short, the barrier that limits how much peptide reaches your skin is the same barrier that keeps it away from the rest of you.

Do peptides work?

Peptides produce measurable improvements in the skin.

The best available summary is a 2026 systematic review and meta-analysis of 19 randomised controlled trials covering 1,341 participants. Peptides significantly improved skin hydration and brightness, with a small but statistically significant pooled effect on wrinkles.⁹

Individual trials support this picture. A 12-week split-face study in 93 women found a palmitoyl pentapeptide significantly reduced fine lines and wrinkles compared with the same moisturiser without it.⁸ An earlier study of acetyl hexapeptide-8 reported up to a 30% reduction in wrinkle depth over 30 days.⁷

What runs through all of it is tolerability. Across those 19 trials, adverse events were minimal.⁹

Why acetyl hexapeptide-8?

Acetyl hexapeptide-8 was has one of the deepest published records of any cosmetic peptide, with more than 20 years of human research behind it.

It was first described in the peer-reviewed literature in 2002 and has been studied continuously since, including a 2025 review dedicated entirely to how it behaves in skin and what it achieves there.⁶˒⁷

We formulate on the depth of the evidence, not on how new an ingredient is. Novel peptides appear constantly, usually with promising laboratory data and no meaningful history of human use. 

In pregnancy that distinction matters more than anywhere else. Trials are not run on pregnant women, so what we can rely on is a long, consistent record of tolerability in people.⁹ 

If we cannot say why an ingredient belongs in a pregnancy formula, it does not go in.

Can peptides replace retinol during pregnancy?

Peptides are not a like-for-like replacement for retinol, but they are a sensible part of what takes its place. 

Retinoids are set aside in pregnancy and there is no single ingredient that does everything they do.² What works instead is a combination of gentler ingredients, each contributing something.

Peptides are the collagen-signalling part of that answer, with the advantage that they do not cause the peeling, redness or sensitivity retinoids are known for.⁵ Across the trials, that gentleness is one of their most consistent findings.⁹

They pair naturally with bakuchiol, which has its own evidence in this space and is better suited to the texture and tone changes retinol is usually reached for. You can read the detail in bakuchiol during pregnancy.

Used consistently alongside bakuchiol they cover most of what retinol was doing for your skin.

How to use peptides during pregnancy

Use peptides in the evening, on clean skin, before your moisturiser.

Peptides are about repair and signalling rather than protection, and they do not need to compete with your morning sunscreen for space. Apply to slightly damp skin, then seal with a moisturiser during pregnancy.

Peptides are not an active you need to introduce slowly. There is no adjustment period and no need to build tolerance, so you can start at any stage of pregnancy.

Give it time. The trials that show a benefit run for 8 to 12 weeks, so judge the result at three months, not three weeks.⁸˒⁹

Our bakuchiol serum during pregnancy is built on this logic. It combines acetyl hexapeptide-8 with bakuchiol, centella asiatica and sodium hyaluronate, so the collagen signalling, the renewal and the hydration all happen in one gentle step.

If you are working out where peptides fit alongside everything else, how skin changes during pregnancy maps it out stage by stage.

This article is intended as general educational information and does not constitute medical advice. Always consult your healthcare provider or dermatologist before making changes to your skincare routine during pregnancy.