I love grapefruit. It's kind of a problem. I bought this powder because the tangerine powder has been out of stock, and I love adding a tablespoon of citrus powder to my fruit smoothies for that extra tang. Well... I was not expecting this juice powder to be quite as tangy as it was. The first smoothie I made was so sour, I broke out in a sweat while drinking it. I had to mix in some sweetener so I could finish it all. Since then, I only use half a tablespoon or less in my smoothies, and it's just fine. You can't really taste the grapefruit without adding more powder, which is accompanied by that tartness, though. If you love sour snacks, this may be perfect for you, but it's a little much for me!