It's incredible and disheartening that grown ass men can't use the right form of grammar on a text forum.
How am I suppose to take someone seriously on their experience with a compound if they come off as stupid because they can't even read or write? It's pathetic.

This is elementary stuff, please excuse me if English is not your first language. For those of you who grew up speaking English there is no excuse for your immaturity on this forum.

Your is the second person possessive adjective, used to describe something as belonging to you. Your is always followed by a noun or gerund.

What is your username?
Is this your review?
Your review is moronic.

You’re is the contraction of "you are" and is often followed by the present participle (verb form ending in -ing).
You’re going to be late.
Is that what you’re wearing?
I think you’re an idiot.