Pregnancy: cosmetic ingredients to avoid for pregnant women protecting your baby.

Visit retinoids danger number one.

Retinoids are vitamin A derivatives. They are found in a large number of anti-aging and anti-acne skincare products. And they're definitely the first family to be banned from your bathroom during pregnancy.

Why retinoids are dangerous during pregnancy

First reason: the teratogenic risk. Teratogenic means «causing malformations». Certain oral retinoids, such as isotretinoin, cause serious malformations in the fetus. It's documented, it's proven, it's irrefutable.

Second reason: skin absorption exists. When you apply a retinoid to your skin, absorption is lower than by mouth. But it's not zero. Small quantities pass into the bloodstream. And these small quantities can reach the foetus.

Given the uncertainty, the benefit-risk balance is clearly unfavorable. The rule is simple: zero retinoids during pregnancy.

Hydroquinone and arbutin: the depigmenting agents to be banned.

Hydroquinone, massively absorbed by the skin

Hydroquinone is a depigmenting molecule used to lighten brown spots. It is banned for over-the-counter sale in France, but authorized in other countries - so be careful when ordering products abroad.

The real problem is its absorption rate. Unlike many active ingredients, which remain on the surface, hydroquinone penetrates deeply: 30 to 45 % of the applied dose can pass into the bloodstream. That's a lot. And we have no solid data to show that it's safe for the baby.

Arbutin, a masked form of hydroquinone

Arbutin is a depigmenting active ingredient found in many anti-spot skincare products. Why is it problematic? Because in the body, arbutin is transformed into hydroquinone. It's a disguised form of the same compound.

Same mechanism, same risk. Hydroquinone and arbutin: strictly avoided during pregnancy.

Visit exfoliating acids not everything has to be thrown away.

Salicylic acid: dose-dependent caution

Salicylic acid is a chemical cousin of aspirin. And aspirin is contraindicated during pregnancy. So what happens when it's applied to the skin?

Applied locally and in low concentrations (1-2 % in a face lotion), its absorption is very low and it is generally not detectable in the blood. Most experts consider the risk of occasional use to be very low, if not non-existent.

On the other hand, at high concentration or over large areas, absorption becomes significant. At high doses, salicylate toxicity may occur - with risks such as Reye's syndrome or disruption of ductus arteriosus closure in late pregnancy.

The practical rule: do not use strong salicylic acid peels during pregnancy. As a precaution, it's best to limit its use and replace it with safer alternatives. That's why all sources of salicylic acid - willow extracts, salicylated derivatives - appear on the list of ingredients to avoid.

AHAs: generally well tolerated

Good news for lovers of chemical exfoliation: the glycolic, lactic and mandelic acids are generally well tolerated at moderate concentrations (around 10 % or less). Their cutaneous absorption is limited, and we have no signals of concern for the fetus.

You can use them in small doses. Just avoid strong peels for nine months and stick to conventional concentrations.

Solar filters: those with avoid, those to focus on.

Sun protection during pregnancy is not optional - in fact, it's a must. one of the most important things. But not all filters are created equal.

Sunscreens to avoid during pregnancy

Here are the organic filters that are best left out of your routine:

• Avobenzone
• Octocrylene
• Oxybenzone
• Octisalate
• Homosalate
• Octinoxate

For oxybenzone, the data show that the risk of systemic passage and endocrine effects is real. For the others, there are serious suspicions. As a precautionary principle, we avoid them.

Why sun protection is crucial during pregnancy

During pregnancy, your estrogen levels skyrocket. As a result, your melanocytes become hyper-reactive. Even a little exposure to the sun produces a lot of melanin.

And you end up with what we call the pregnancy mask (or melasma): brown spots on the face, particularly difficult to remove after childbirth. The best protection is to avoid the sun - hat, cap, glasses - combined with a compatible sun cream.

Visit endocrine disruptors the most vicious.

This category is of particular concern. Endocrine disruptors mimic or block your hormones. And during pregnancy, hormonal balance is critical to the baby's development.

The main endocrine disruptors to watch out for

• Long-chain parabens - With their mild estrogenic activity, they mimic your natural estrogen.
• Phthalates (notably DBP) - have been associated with abnormalities of the male reproductive system in animals, and several human studies suggest endocrine effects.
• Triclosan - disrupts thyroid function in animal models.

A highlight: parabens and phthalates have been found in human amniotic fluid. This is direct evidence that they cross the placenta.

Visit essential oils Natural« does not mean »safe«.

Many people think: «It's natural, so it's safe.» This is a major error in reasoning. Essential oils are extremely powerful concentrates, and some cross the placental barrier.

Essential oil families to avoid

• Rich in ketones (sage, mugwort) - potentially neurotoxic, risk of miscarriage.
• Uterotonics (clove, rosemary camphor) - risk of triggering contractions.
• High-dose peppermint - risk of fetal heart disease.
• Even the «sweet» ones» (lavender, citrus) - use sparingly.

The rule of caution: no essential oils in the first trimester. And even then, be very careful - no ingestion, no direct application to the skin without professional advice.

Visit other ingredients to keep a close eye on.

Phenoxyethanol

A widely used preservative. At cosmetic doses, it poses no real problem in adults. But it has been detected in the umbilical cord - so it does cross the placenta. As a precaution, limit exposure.

Aluminum salts

Present in antiperspirant deodorants. Aluminum passes through the skin, particularly after shaving, and crosses the placenta. Choose deodorants aluminum salt-free during pregnancy.

PFAS («eternal pollutants»)

Present in long-lasting or waterproof products. They accumulate in the body and pass into the placenta. High exposure during pregnancy may be associated with low birth weight and increased risk of prematurity.

Formaldehyde releasers

These preservatives gradually release formaldehyde - classified as carcinogenic and toxic to reproduction. More and more marques are phasing them out, but be sure to read labels carefully.

DEA (diethanolamine)

Foaming agent used in some shampoos. It can form carcinogenic nitrosamines and has shown developmental effects in animals. Do not use.

Tranexamic acid: a special case

Used to treat pigmentation disorders such as melasma. Orally, it carries a risk of thrombosis, which is problematic during pregnancy. Topically, absorption is low and the risk limited - but as a precaution, it's best avoided until more solid data are available.

The good news is perfectly safe ingredients.

You can continue to take care of your skin during pregnancy. Several active ingredients are perfectly compatible, and some are even very good alternatives to ingredients to be avoided.

With these four assets alone, we can already build a complete, effective and 100 % safe routine over the nine months.

Frequently asked questions about cosmetics and pregnancy.