The 1 day per week intermittent fasting group appears the most interesting to me as overall caloric intake was maintained but body weight slightly reduced (possible improvement in body composition?) and some measured health benefits.
To me the loss of lean mass (and probable hunger) experienced by the 40% and 20% caloric restriction groups (if applicable to humans) would considerably reduce quality of life while increasing the risk of hospitalisation and early death from falling injuries in later life.
Each to their own I suppose. My preference would be to live an averagely long life with a high capacity over a long life with compromised capacity.
Some of these graphs are hard to read on mobile, but I thought that lean tissue loss was only shown on the 40% group?
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