I swear I must be hypothyroid. I don't eat hardly **** versus my 130lb wife who doesn't ride 5000KJ a week. I hold 70kg or so fine, but I'm not eating freaking 2700 to 3000 cals a day. No freaking way. I'm also sometimes cold. 75 or 76 in summer in the house for the a/c setting feels good to me. I'm told that's not the norm.
So running cool and a slow metabolism sounds like time for an annual phys bloodwork to me.