I found out that in order to give blood at my height I'd have to weigh over a stone more (16lbs more to be precise). I know my body image is screwed, but there is no way I'd be okay being a stone more, and my bmi is fine as it is. Yes I know the bmi system is majorly flawed, but as a rough benchmark for the average person it's all I have to go off. It sucks because it's something I've always wanted to do, it costs me nothing and could save lives, why not? But no, I'd have to weigh 9st 2lbs