Twin Lab's acetyl-l-carnitine - Product Review  Hot

 Twin Lab's acetyl-l-carnitine


Acetyl-l-carnitine (or ALC) is a naturally formed derivative of the amino acid L-carnitine. Carnitine is derived from the essential amino acids methionine and lysine. This biologically active form of L-carnitine transports fatty acids into the cell's mitochondria to produce energy. The mitochondria is the cell's energy powerhouse, converting energy from food molecules into ATP energy for cell functions. Acetyl-l-carnitine is well-known as an energy nutrient that is used to support all bodily functions that require high levels of energy. Acetyl-l-carnitine's multi-functional uses include:

  • Enhances physical performance
  • Potent antioxidant that boosts immunity
  • Increases fat loss
  • Improves cellular energy in the brain
  • Promotes cognitive function, mental alertness and mental performance
  • Slows the effects of aging
  • Decreases symptoms of depression in elderly persons
  • Regulates testosterone in men
  • Supports healthy heart function


Supplementation with acetyl-l-carnitine can be an important addition to the diet. The main food source of carnitine is red meat with lower concentrations (or none) in plant protein. Therefore, vegetarians, vegans and those who eat little to no red meat may have low carnitine levels. Other reasons for low levels of carnitine include a genetically based carnitine defect, decreased methionine and lysine, injury, depression and advancing age. If the demand for carnitine exceeds the body's ability to produce it, carnitine becomes a conditionally essential nutrient.


Acetyl-l-carnitine has been shown to be safe in many studies. Side effects are uncommon, although nausea, vomiting, increased agitation and confusion have been reported.

The "D" form of carnitine must not be taken as it can create an L-carnitine deficiency in muscle and interfere with L-carnitine and acetyl-l-carnitine function. D-carnitine supplements have been banned in the United States due to this toxicity.

Is it for you?

Athletes and body builders can enhance their physical performance and replenish their muscle's energy stores by taking acetyl-l-carnitine. If you're looking to lose weight, acetyl-l-carnitine can help burn fat, making it an important component of a weight management program. Vegetarians, seniors, and anyone who wants to obtain acetyl-l-carnitine positive effects would benefit from acetyl-l-carnitine supplementation.

Dosage and Directions

Take one capsule daily or as directed. Store tightly closed in a cool, dry place.

Acetyl-L-Carnitine(ALC) Supplement Facts

Serving Size: 1 Capsule
Servings Per Container: 30
  Amount Per Serving Daily Value
Acetyl-L-Carnitine 500 Milligrams *
* Daily Value not established

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