i buy from GNC not because i really like their product actually but because its more reachable since the store is nearby. yes i know iherb.com, i shop there too. but in here the DHL sometimes/usually stealth charges for handling fee, bank, storage, licence, etc which usually cost the same as the product i buy. so it could turn out as expensive as GNC. im interested in hydroxycobalamin too but i can only find 1 product @iherb well i took green veges everyday add some veges on almost every meal. i dont think i should take folate yet. will consider it later because the candida, bacteria issue. and it could also add fuel to the methylation process. so its better to wait i think.