With a twofold increase in the world’s elderly predicted between 1998 and 2025, interest in aging has greatly accelerated. Maintaining good quality of life as we age is important. L-Carnitine is the supplement of choice to help maintain good health. Elderly people have a lower energy demand and eating habits change with age. For example, they usually consume less meat. At the same time, the dietary intake of both L-Carnitine and the nutrients required to make L-Carnitine is reduced. A decreased endogenous synthesis could also be shown by researchers. A decrease of L-Carnitine in various body compartments with age has often been described in literature. The resulting reduction in energy metabolism due to lower L-Carnitine levels can be restored by L-Carnitine supplementation. Two months of L-Carnipure® L-Carnitine L-Tartrate administration (2g/d) was shown to partly reverse age-related changes of oxidative metabolism in elderly females. Aging induces several structural and functional changes in the brain. Blood supply to the brain decreases with age. The number of neurons, the brain cells that specialize in transmitting information, diminishes. An imbalance of changes caused by increased production of free radicals and decreased functional efficiency of the antioxidant system has been suggested to be one of the primary factors that contribute to the aging process. Supplementation with 4g L-Carnitine/day resulted in significantly improved mental status in elderly people, compared with the placebo group, assessed by means of the Wesseley and Powell scale. L-Carnitine can be regarded as the ideal nutrient for a long life, as it comprises all the benefits that seniors need to stay fit and healthy in both mind and body.