Long chain fatty acids are a fecal fat. Fecal fats also include triglycerides, cholesterol and phospholipids. They are derived predominately from the dietary ingestion of fat, and provide important clues about digestion and absorption.

Long chain fatty acids are a fecal fat. Fecal fats also include triglycerides, cholesterol and phospholipids. They are derived predominately from the dietary ingestion of fat, and provide important clues about digestion and absorption.

Lipoprotein-associated phospholipase A2 (Lp-PLA2), also known as platelet activating factor Acetylhydrolase, is an inflammatory enzyme that circulates bound mainly to low density lipoproteins and has been found to be localized and enriched in atherosclerotic plaques.

The LP-IR Score, or Lipoprotein Insulin Resistance Score, is a clinically significant biomarker used to assess insulin resistance, a key factor in the development of type 2 diabetes and cardiovascular diseases. This score is derived from the detailed analysis of lipoprotein particle size and concentration in the blood, using advanced nuclear magnetic resonance (NMR) spectroscopy. Lipoproteins, which are complexes of lipids and proteins, play crucial roles in the transportation of cholesterol and triglycerides in the bloodstream.

The LP-IR Score is calculated based on the levels of specific lipoprotein subclasses, including very-low-density lipoprotein (VLDL), low-density lipoprotein (LDL), and high-density lipoprotein (HDL) particles, along with their respective sizes. These lipoprotein metrics are integral in understanding the pathophysiology of insulin resistance.

For instance, an increased number of small, dense LDL particles and large VLDL particles are often indicative of insulin resistance.

Lupus anticoagulants are antibodies against substances in the lining of cells. These substances prevent blood clotting in a test tube.

Luteinizing Hormone, Human (hLH), plays a crucial role in the female reproductive system and is a key marker on a female hormone panel. This hormone, produced by the pituitary gland, is involved in regulating the menstrual cycle and ovulation. In the first half of the menstrual cycle, hLH levels gradually increase, leading to a significant surge just before ovulation. This surge is critical as it triggers the release of an egg from the ovary, making it a pivotal moment for fertility. After ovulation, if the egg is not fertilized, hLH levels decrease, and the menstrual cycle continues.

Luteinizing hormone (LH) is hormone associated with reproduction and the stimulation of the release of an egg from the ovary (ovulation) in women and testosterone production in men.

Two types of antibodies are detected in the Western blot test.

IgG antibodies are a sign of an older infection. IgM antibodies in contrast reflect a relatively recent infection.