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There have been suggested that metformin, a at best weak calorie restriction mimetic, can suppress some of the beneficial metabolic response to exercise. Metformin is in general a poor choice in comparison to mTOR inhibitors when it comes to animal evidence for an ability to modestly slow the progression of […]

In a seminal 2013 study, MDI Biological Laboratory scientist James Godwin, Ph.D., discovered that a type of white blood cell called a macrophage is essential to limb regeneration in the axolotl, a Mexican salamander that is nature’s champion of regeneration. Without macrophages, which are part of the immune system, regeneration […]

Genes determine species longevity, though within a species, and particularly within our species, the estimated involvement of genetic variants in individual life expectancy is becoming ever smaller as ever more data accumulates. Nonetheless, researchers are very interested in the comparative biology of aging, the question of why long-lived species are […]

Exercise in the form of strength training creates such broad changes in metabolism and produces such diverse benefits to health that it is interesting to see a specific example in which it doesn't help at all. That is possibly a path to better understanding which of the results of exercise […]