Marine collagen is a popular supplement that is often taken for its skin-related benefits. However, there is limited research on its safety during pregnancy.
Some studies have found that marine collagen may help improve skin elasticity and reduce the appearance of stretch marks. However, these studies were done on animals, so it is not known if the same effects would occur in humans.
Marine collagen is also a source of the amino acid glycine, which is thought to be important for fetal development. Glycine has been shown to be essential for the synthesis of DNA and RNA in developing embryos.
However, there is no direct evidence that marine collagen supplementation would provide any benefits for pregnant women or their babies. Until more research is available, it is best to err on the side of caution and avoid taking marine collagen during pregnancy.