I buy supplements and specialty foods quite often and I know just how overpriced they can get. Especially when you're talking about vitamins, sulfate-free dried fruits, gluten-free produce, specialty drinks, non-dairy ice cream, etc. This place is my first choice for all that.
Just as a comparison, a large tub of AOR Advanced Whey protein powder, which I consider to be the best, cleanest of its kind, costs around $45.99-$49.99 here, with its smaller equivalent ranging anywhere between $25.99-$29.99. In other stores, the small container is likely to cost you at least $35.99, if not more.
Same goes for vitamins. I've been buying those online for the longest time because that was the cheapest way to get them. Not anymore, they're at least as cheap here, plus you don't have to shell out more money for customs fees.
Not all food items are cheaper, some will cost you a lot no matter where you go. But here you get a chance to actually save some money on what matters. So I highly recommend this place.