You're doing the best thing you can for your body ryjola. Maybe your mates are jealous they don't have the courage to do the same. Fasting has also been a part of mainstream bodybuilding as I understand it, some fast before every competition, up to a week, to reduce their fat to almost zero and attain the greatest definition they can. By contrast what you are doing primarily for your health should only be celebrated not described as negative in any way. I understand the reaction fully though- none better.