L-Carnitine
One of the key uses of Acetyl L-Carnitine supplement is for fatty acid oxidation - helping users burn unwanted body fat. Fatty acids are one the key energy sources the body uses, and oxidation is the process by which they're broken down to create energy. L-Carnitine, a "free amino acid" has been found to improve fat metabolism in the heart and other organs and tissues, reduces Triglyceride and cholesterol levels, improves heart muscle tolerance, prevents irregular heartbeat and angina, provides more energy for the heart and helps lower blood pressure.
L-Carnitine is a derivative of the amino acid, lysine. Its name is derived from the fact that it was first isolated from meat in 1905.
Meat, poultry, fish, and dairy products are the richest sources of L-carnitine. Tempeh (fermented soybeans), wheat, and avocados contain some L-carnitine, while fruits, vegetables, and grains contain relatively little L-carnitine to the diet. Omnivorous diets have been found to provide 20 to 200 mg/day of L-carnitine, while strict vegetarian diets may provide as little as 1 mg/day. Vegans get considerably less (about 10 to 12 milligrams) since they avoid animal-derived foods.
- Beef steak, cooked, 4 ounces: 56-162mg
- Ground beef, cooked, 4 ounces: 87-99 mg
- Milk, whole, 1 cup: 8mg
- Codfish, cooked, 4 ounces: 4-7mg
- Chicken breast, cooked, 4 ounces: 3-5mg
- Ice cream, 1/2 cup: 3mg
- Cheese, cheddar, 2 ounces: 2mg
- Whole-wheat bread, 2 slices: 0.2mg
- Asparagus, cooked, 1/2 cup: 0.1 mg
Your body can produce a very small amount of L-Carnitine on a daily basis, with the highest concentrations in the heart and skeletal muscles. In certain conditions, the demand for carnitine may exceed a person's ability to synthesize it, thus making it a conditionally essential nutrient.
There are very few documented side effects, and they include:
- Increase in blood pressure
- Faster heartbeats
- Fever
- Large amounts may cause diarrhea
L-carnitine may improve mental and physical health. Centenarians given regular supplements of L-carnitine experience significant improvements in mental and physical fatigue and muscle mass. That is what Italian researchers found when they gave two grams of L-carnitine a day for six months to 32 men and women who had passed the century mark. They compared them to 34 centenarians who got placebos. L-carnitine contributes to energy metabolism and improves neutrotransmitter function in the brain.
Studies now also suggest that L-carnitine helps with Male Infertility.
Aging
A decline in mitochondrial function is thought to contribute to the aging process. Carnitine may be involved because its concentration declines with age and thereby reduces the integrity of the mitochondrial membrane. A meta-analysis of double-blind, placebo-controlled studies suggests that supplements of acetyl-L-carnitine may improve mental function and reduce deterioration in older adults with mild cognitive impairment and Alzheimer's disease. In these studies, subjects took 1.5-3.0 grams/day of acetyl-L-carnitine for 3 to 12 months.
