My natural frame would have to be characterized as "lanky", and I'm not after big gains in muscle mass. Wy workout consists of a karate class, which makes for tons of cardio and bodyweight conditioning, along with running three times a week. My diet is whole foods, as little processed food as possible. I'm really looking for a single supplement to add to my daily multivitamin to help speed recovery, etc. I'd rather it contained little or no sugar and few carbs. Thanks for any input.