futrdoc, I believe I've read that you can take the drink hot or cold, whichever you prefer. And adding the lemon AFTER you heat the water I believe is the ideal way to do it. I'm on day 5, LOVE the drink COLD and have not had any cravings yet, am feeling better than I ever have in my life and am looking forward to day 10! Of course, I have to go through Day 7 first which I've read could be not such a good day! KEEP IT UP! YOU'RE DOING GREAT!