@s2208 yeah its just a supplement so you can buy it from multiple online suppliers, I use Forefront Health. I would start with 100 mg a day and be sure to eat enough and get good sleep, it will boost your appetite a whole lot especially for sugar and if you don't eat a lot it makes you feel like dogshit. Despite eating much more (5 full meals a day + as much ice cream and OJ as I want) I haven't gained weight though because of the metabolic effects.