An ingredient found in many shampoos and other personal care products appears to interfere with normal brain development in baby mice when applied to the skin of their pregnant mothers, so it might be a bad idea for pregnant PEOPLE to use it as well.

Researchers have discovered that Diethanolamine (DEA) was applied to the skin of pregnant mice, the fetuses showed inhibited cell growth and increased cell death in an area of the brain responsible for memory?the hippocampus. DEA appears to block the body’s ability to absorb the nutrient choline, which is essential for normal development of the brain. A pregnant woman requires extra choline so that she can pass the nutrient on to the fetus. Researcher Steven Zeisel says, “You need choline to build a baby.”
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