I always thought it could only be bought direct from Nutri, but a quick Google tells me I'm wrong! Worth checking if any resellers are officially sanctioned, though, as I know that when I was a new customer, they asked for the name of my practitioner. (May only apply to selected items, of course.) They will sometimes give a bulk discount (eg buy 5, get 1 free) so it's worth asking about that when you call.
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