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My husband and I are regular iHerb customers. We love this site because it has better prices and better shipping costs than anywhere else we've found so far. This is where we order our flour (usually buckwheat, barley, rice and sorghum), our SweetLeaf stevia (the cheapest place we've found it), our toothpaste (JASON for us, Weleda for the kids), and also some of our supplements like Vitamin C and my prenatal vitamins (Rainbow Light "Just Once"). We appreciate their low, flat fee shipping rates especially when our orders are heavy, like when we order a lot of flour. Not only are their prices good, but their customer service is excellent as well. We often find that when we order something, we receive it the very next day with their unbelievably fast shipping. When we've made mistakes with our order or forgotten to add something, they have been very helpful and understanding.
I highly recommend iHerb.com. Give them a try!