Hi, first time poster. I have 5 bottles of said product but none of them have expiration date on them. They were bought from a reputable company. The wrap on the top of 3 bottles has says blackstone labs the other ones don't. On the bottom 3 have writing and other 2 don't. I called the supp. Company and that said they get all there products from bsl but something doesn't seem right. Has anyone used this without expiration date. Thanks