Deuterium is important for growth because it keeps the S-phase of the cell cycle going and speeds up proliferation.

“so the term ism is important for growth because it keeps the S cycle going it also allows you to - so it speeds up the rate of proliferation vs cycle being one of the cycles of sort of mitosis right so mitosis has a variety of cycles people can look this up you know there's a s cycle is shorter right okay it's one of the cycles of cell division yeah”