L-Carnitine
What It Is
L-carnitine is a product of two of the essential amino acids that the body
cannot produce on its own: lysine and methionine. It can be obtained from meat
and dairy products and is also available as natural and synthetic supplements.
What It Does
Lysine, methionine, and the other essential amino acids must all be on hand
before the body can manufacture the proteins needed to repair and maintain its
tissues.
Why You Need It
Without the essential amino acids, including those in l-carnitine, normal growth
and development is impossible. Unless you're a strict vegetarian, however, a
deficiency is unlikely. Muscle weakness is the main sign that you may have a
deficiency of l-carnitine in your system.
Can You Take Too Much?
Like most amino acids, l-carnitine is rarely toxic, taken in large amounts.
Recommended Daily Allowances
No allowance has been established.
Best Dietary Sources
Natural sources of l-carnitine include dairy products, avocados, and lamb, beef,
and other red meats. L-carnitine is also found in the soybean product called
tempeh.
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