sure, no problem.
though you'd probably have better results going to walgreens and buying 2 bottles of dhea (the ph in sdng)
buying atd from any online retailer for cheap, and get more than the 7.5mg in sdng
buying 200mg caffiene tablets for around 5$ at your local sup shop.
eat right, train hard, take your vitamins, and hope the dhea converts into test, not estrogen.