Retinyl Palmitate and Retinol (Vitamin A)
Commonly found in: moisturisers and anti-aging skin care.
Why you should avoid it: Retinoids are a type of vitamin A that prevents skin collagen from breaking down, thus making them a popular anti-aging tool. But consuming high doses of vitamin A during pregnancy has been shown to possibly cause birth defects, leaving doctors to recommend women avoid these products during pregnancy. Some oral retinoids, like the prescription acne medication Accutane, are known to be very dangerous for the fetus and should only be taken when you're not pregnant or planning to be.