After further review and investigation in this claim, I believe it to be true. The main concern in these products is PFA's, polyfluoroalkyl substances, a chemical put into many self-care products such as makeup, hair products, nail polish, etc. They are utilized due to their ability to retain oil, water, and heat.
A study at Brown University proves that PFA's are associated with a wide variety of health defects. They have shown to be associated with liver disease, cardiometabolic disease, cardiovascular issues, as well as various cancers. I am an avid user of beauty products, and learning about the dangers of PFA's has really changed my perspective on them. This is especially concerning to pregnancy cause although we only use them externally, they cause issues internally. PFA's have shown to contribute to adverse birth outcomes such as some neurodevelopmental disorders, preterm birth, decreased birth weight, and diminished vaccine response in children.
Tom Perkins reported in the Guardian about a previous research project regarding PFA's. During this process, scientists recorded 30,000 umbilical chords taken from all over the globe during a five-year period. During this project, researches found in the United States 50 samples of breast milk were found to contain very alarming levels of the chemicals. This may be a small amount compared to the study, but nonetheless the odds are not zero.
Initially, I did not find this claim to be true. However multiple reputable sources have informed me of the dangers of PFAS and how truly damaging they can be during and after pregnancy. Due to an existence of statistics on this claim, it is true.