choline and acetyl l carnitine Source Naturals L-Carnitine Tablets 500mg, 60 ct Acetyl-l-Carnitine in the Treatment of

Plasma concentrations remained minimal, even at high doses, with most curcumin localized in the small intestine and little reaching systemic circulation, resulting in a bioavailability of approximately 1% (90, 92)

(61) demonstrated that combined L-carnitine and nicotinamide riboside administration upregulated multiple metabolic and insulin signaling regulators ( Ppargc1b, Acox1 ), promoting mitochondrial oxidative phosphorylation and peripheral glucose uptake

doi:10.21037/tau.2018.06.20

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These processes require targeted intervention, not generic "anti-aging" ingredients hoping to stumble upon improvement