As Hurtado says, “Your scalp and hair need time to adjust and recognize a new formula, which is very normal. Switching to a sulfate-free shampoo can take a little time—almost near two to four ...

and the salt magnesium sulfate. The symbol for magnesium is Mg, and sulfuric acid is a compound containing sulfur, oxygen, and hydrogen. Its formula is written: H2SO4. So we write Mg plus H2SO4.