I have been taking Synthroid for hypothyroidism for almost 20 years now. I have been adding CO to my diet for about 3 weeks now and I have to say it's all true. It was an obvious difference to me within one week of taking it that something was happening and I wasn't doing anything differently with my routine. My clothes were fitting looser after about the first 6 days and I feel like I'm continuing to drop body fat. I'm just a little ticked that I didn't hear about this way sooner. Better late than never.