Indispensable, hyaluronic acid is excellent for combating the effects of skin ageing and providingthe skin with a plumped texture. "Sodium Hyaluronate", "Hyaluronic acid", "Hydrolysed hyaluronic acid", "Sodium Hyaluronate Crosspolymer", "Sodium Acetylated Hyaluronate"... it can be difficult to navigate through all these forms of hyaluronic acid. What differences exist between these compounds?