L-carnitine boosts strength and energy

Muscle strength naturally declines with age. Doctors proposed that the amino acid L-carnitine might help maintain and improve strength by enhancing mitochondrial function, the primary energy mechanism in every cell.

In the first study of its kind, 50 older adults took a placebo or 500 mg of L-carnitine three times per day. After 10 weeks, 34.4 percent of those taking L-carnitine saw significant improvement in strength scores compared to 2.1 percent for placebo. Handgrip strength increased 7.2 percent vs. a 3.6 percent decline for placebo. Also, 42.3 percent of those in the L-carnitine group reported feeling more energetic compared to 16.7 percent for placebo.

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