One word: AMAZING! I suffer from hypothyroidism. And even though I take thyroid medication, a lot of times it doesn't help the symptoms. Dragging, no energy, hard to make it through the day. My husband's best friend's wife introduced me to Spark. I was sceptical, thinking, "ok it's one of those scheme products people try to get you to buy because they make something from it too." Wrong. I actually felt better. And even better, it tastes GOOD!