some places "scam" you some dont, the good thing is that it can be stored for a while, as long as its in a dark cool place, the fridge would be the best place for storage, itll keep most if not all its potency.
some places ive had nolva from was pink, shake it up and then use the dropper tasted like mint bubble gum, to me atleast. the problem with these research chemicals is its all word of mouth, and thats a bad thing to go by only becuase you have to basically try it for PCT to know if its working. the good thing is you can ween out certain places, there are many Innovative Research companies that have legit stuff yanno......?