There are provided various compositions comprising monoglyceride(s) and cannabinoid(s). These compositions can be useful for increasing the life span of a subject; for increasing the disability-free life expectancy, for slowing down the ageing process of a subject; for increasing the mitochondrial OXPHOS of a subject; for decreasing the mitochondrial LEAK of a subject; for increasing the mitochondrial RCR or COUPLING EFFICIENCY of a subject; and for optimizing the mitochondrial functions of a subject.