I dont know. To be honest all these research chems r hit or miss, even if they r legit they r still hit or miss bro. Iv seen many including myself use board sponsored chem sites and very legit chem gear like this and it be bunk for some while good for others. U wouldnt use reaserch chem for ur cycle so why risk using it for the most important part of ur cycle, PCT? Idk, just sayin since legit pharm grade nolva. clomid, etc is about same price as these chems i really dont see any reason anymore to use the chems. Ive seen red liquid tamox before but again, couldnt really tell ya. These companies never use batch numbers or anything so no one can give u an honest yes or no. And again, if it worked for someone else doesnt mean its gonna work for u and vice versa. Hate to say it bro but its really the truth. If ur just gonna do a wack ph cycle then use otc pct, if ur usin real gear then u must have a real source and any real source will for sure sell real pct supplies. Please dont ask for sources, just sayin how it is bro.