Protein supplement

[8] Increased resistance training also helps balance aging's negative effect on muscle mass.

[3] A study group concluded: "Older people with severe kidney disease (i.e., estimated GFR less than 30 mL/min/1.73m2), but who are not on dialysis, are an exception to this rule; these individuals may need to limit protein intake.

[9][10] However, recent studies suggest that protein intake for muscle gain can be taken either throughout the day or at one time, if that is more convenient.

[11] There is no evidence supporting specific pre/post-workout timing for protein-supplement intakes, despite the widely held belief that pre- or post-workout protein supplementation would be more effective.

[13] Pre-albumin levels and mid-arm circumference measurements may also be increased following supplementation, though the certainty of evidence is low.