L-carnitine 左旋肉碱250mg 60颗
As a dietary supplement, adults take 1 capsule daily or as directed by your healthcare professional.
Douglas Laboratories’ L-Carnitine supplements supply pure, natural L-Carnitine in capsule form.
L-Carnitine may be a useful nutritional adjunct for individuals who wish to support heart muscle function or skeletal muscle performance.
L-Carnitine is necessary for fatty acid metabolism and energy production in cardiac and skeletal muscle. It is involved in fatty acid oxidation as part of the carnitine shuttle. L-Carnitine shuttles fatty acids from the cytosol (the cell fluid) into the mitochondria (the cell’s powerhouses) for oxidation and energy production. L-Carnitine is necessary in muscle whenever fat is utilized as an energy source. Heart muscle always uses fat for its continuous energy demands. Skeletal muscle begins using fat only after its glycogen reserves are exhausted.
This happens after about one hour of continuous, strenuous exercise, e.g., long-distance running, bicycling, swimming, or mountain climbing. Widely distributed in foods from animal, but not plant sources, L-Carnitine is also synthesized by the liver and kidney from two essential amino acids, lysine and methionine. Human skeletal and cardiac muscles contain relatively high L-Carnitine concentrations which they receive from plasma, since they are incapable of L-Carnitine biosynthesis themselves.
About 95 % of the body’s L-Carnitine stores are located in skeletal and heart muscle. L-Carnitine is considered a conditionally essential nutrient. In healthy people, plasma L-carnitine levels are adequately maintained by the body’s own synthesis and dietary sources. However, low L-Carnitine plasma levels can be caused by hereditary (primary) L-Carnitine deficiency syndrome, or by secondary L-Carnitine deficiency. Patients with heart failure excrete large amounts of L-Carnitine in their urine. Oral L-Carnitine is readily absorbed across the intestinal mucosa and into the bloodstream.
It is then taken up from the portal vein into the liver and subsequently released into the systemic circulation. Most cells have a specific carnitine transporter. Dietary L-Carnitine comes mainly from animal foods. Average non-vegetarian diets provide about 100 to 300 mg of L-Carnitine per day. Vegetarian diets often provide only trace amounts, since vegetables, fruits, and cereals are negligible sources of L-Carnitine.
Serving Size: 1 Capsule
Servings Per Container: 60
Amount Per Serving
* Daily Value not established
Cellulose, Gelatin (capsule), Silica
Does Not Contain:
Yeast, Wheat Gluten, Soy Protein, Milk/Dairy, Corn, Sodium, Sugar, Starch, Artificial Coloring, Preservatives, Flavoring
KEEP OUT OF REACH OF CHILDREN.
These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not meant to diagnose, treat or cure any disease or medical condition. Please consult your doctor before starting any exercise or nutritional supplement program or before using these or any product during pregnancy or if you have a serious medical condition.