Because different products
contain different active ingredients, they all work a little differently.
Not exact matches
Almost 90 percent of known
active pharmaceutical
ingredients contain one or more «heterocyclic aromatic rings», structures that
contain atoms of at least two
different elements.
Serums are
different from your typical face creams because they
contain a high concentration of
active ingredients and are lightweight, so they penetrate deeper into your skin to provide maximum benefits.
In some situations, drugs sold in other countries will
contain different amounts of the
active ingredient or they may be named differently.