Chemical matter is just energy packaged differently
Take Testosterone for example, C19H28O2. 19 Carbons, 28 Hydrogens, 2 Oxygens.
Estrogen C18H24O2. 18 Carbons, 24 Hydrogens, 2 Oxygens.
Difference of 1 carbon and 4 hydrogen changes testosterone into estrogen and vice versa.