Ingredients to Avoid During Pregnancy: Complete Guide

During pregnancy, your skin absorbs a portion of what you apply topically. Certain ingredients can cross the placental barrier and may pose risks to fetal development. Major health authorities including the FDA, ACOG (American College of Obstetricians and Gynecologists), and NHS have identified specific ingredients that pregnant women should avoid or use with caution.

This guide covers the 7 most important ingredient categories to watch for, based on established medical consensus.

1. Retinoids (Vitamin A Derivatives)

What they are: Retinol, tretinoin, adapalene, tazarotene, and isotretinoin. On ingredient labels, look for retinyl palmitate, retinaldehyde, or retinoic acid.

Where they are found: Anti-aging serums, acne treatments, prescription creams, and some moisturizers marketed for wrinkle reduction.

Why they are concerning: Oral retinoids, particularly isotretinoin (Accutane), are classified as FDA Pregnancy Category X — meaning they are conclusively linked to severe birth defects affecting the brain, heart, and face. This is one of the most well-established teratogenic risks in medicine.

While topical retinoids deliver a much lower dose than oral forms, ACOG advises against using topical retinoids during pregnancy as a precautionary measure, since the same mechanism of action applies and safe thresholds during pregnancy have not been established.

Safe alternatives: Vitamin C serum, azelaic acid, or niacinamide for anti-aging and brightening effects.

2. High-Dose Salicylic Acid (BHA)

What it is: Beta hydroxy acid, commonly used for exfoliation and acne treatment.

Where it is found: Acne cleansers, toners, chemical peels, and spot treatments.

Why it is concerning: Oral salicylates (such as high-dose aspirin) are associated with pregnancy complications. ACOG advises avoiding high-concentration salicylic acid peels and treatments during pregnancy.

Low-concentration products (under 2%) used as a wash-off cleanser are generally considered low-risk by most dermatologists, as the skin exposure time is minimal. However, leave-on treatments and professional-grade peels should be avoided. When in doubt, consult your healthcare provider.

Safe alternatives: Glycolic acid or lactic acid in low concentrations for gentle exfoliation.

3. Hydroquinone

What it is: A skin-lightening agent that works by inhibiting melanin production.

Where it is found: Dark spot correctors, melasma treatments, and skin-brightening products.

Why it is concerning: The body absorbs a significant percentage of hydroquinone when applied topically — the FDA estimates 35-45% systemic absorption. Due to this high absorption rate, ACOG recommends avoiding hydroquinone during pregnancy. Its safety in pregnancy has not been established.

Safe alternatives: Vitamin C serum, niacinamide, or azelaic acid for treating hyperpigmentation.

4. Formaldehyde and Formaldehyde-Releasing Preservatives

What they are: Chemical preservatives including DMDM hydantoin, quaternium-15, imidazolidinyl urea, diazolidinyl urea, and bronopol.

Where they are found: Nail polish, hair straightening treatments (keratin/Brazilian blowout), some shampoos and body washes.

Why they are concerning: Formaldehyde is classified as a known human carcinogen by the International Agency for Research on Cancer (IARC). Exposure occurs through both inhalation and skin contact. Pregnant women should be especially cautious about formaldehyde-releasing hair treatments due to the significant inhalation risk in enclosed salon environments.

Safe alternatives: Formaldehyde-free nail polish (often labeled “5-free” or “10-free”), and avoid keratin hair treatments during pregnancy.

5. Phthalates

What they are: Plasticizing chemicals, often listed as diethyl phthalate (DEP) or dibutyl phthalate (DBP). They are frequently hidden under the generic label “fragrance” on ingredient lists.

Where they are found: Fragranced products, nail polish, hair spray, perfumes, and scented lotions.

Why they are concerning: The FDA acknowledges that some phthalates are endocrine disruptors. Animal studies have demonstrated reproductive and developmental effects. Multiple health authorities recommend minimizing phthalate exposure during pregnancy as a precautionary measure. DBP is banned in cosmetics in the European Union.

Safe alternatives: Choose “fragrance-free” (not just “unscented”) products, and look for phthalate-free nail polish.

6. Chemical Sunscreens (Oxybenzone, Avobenzone, Octinoxate)

What they are: UV-filtering chemicals that are absorbed into the skin to provide sun protection.

Where they are found: Chemical sunscreens, moisturizers with SPF, foundation with SPF, and lip products with SPF.

Why they are concerning: Oxybenzone in particular has been detected in blood, urine, breast milk, and amniotic fluid. The FDA has stated that more safety data is needed for these ingredients. Oxybenzone has shown endocrine-disrupting properties in studies.

ACOG recommends mineral sunscreens (zinc oxide and titanium dioxide) as the preferred alternative during pregnancy. Mineral sunscreens sit on the skin surface rather than being absorbed, making them a safer choice.

Safe alternatives: Mineral sunscreen with zinc oxide or titanium dioxide, SPF 30 or higher.

7. Parabens

What they are: Preservatives used to prevent bacterial growth — methylparaben, propylparaben, butylparaben, and ethylparaben.

Where they are found: Moisturizers, shampoos, makeup, body wash, and many everyday personal care products.

Why they are concerning: Parabens are known to mimic estrogen at low levels, making them weak endocrine disruptors. While the FDA has not banned them, they have been detected in placental tissue. As a precautionary measure, many dermatologists and health authorities recommend avoiding parabens during pregnancy.

Safe alternatives: Choose products labeled “paraben-free.” Many brands now offer paraben-free formulations across all product categories.

Quick Reference: What to Look For on Labels

The Bottom Line

When in doubt during pregnancy, choose fragrance-free, paraben-free products and consult your OB-GYN or dermatologist. Reading ingredient labels is one of the most effective ways to protect yourself and your baby. Many safe and effective alternatives exist for every ingredient on this list.

Related Guides

• Safe Skincare Routine During Pregnancy: Step-by-Step Guide
• Foods to Avoid During Pregnancy: Evidence-Based List