Lactobacillus reuteri: Evidence for Infant Colic Relief, H. pylori Support, Antibiotic-Associated Diarrhea, and Oral Health
Lactobacillus reuteri (recently renamed Limosilactobacillus reuteri) is a well-studied probiotic species naturally found in the human gut, oral cavity, and breast milk. Certain strains—most...
Lactobacillus rhamnosus: Evidence-Based Uses for Antibiotic-Associated Diarrhea and Respiratory Health, Dosage, and Risks
Lactobacillus rhamnosus (often updated taxonomically as Lacticaseibacillus rhamnosus) is one of the most researched probiotics in children and adults. Its best-known strain, LGG (ATCC...
Lactobionic acid: Skin Benefits, Gentle Exfoliation, How to Use, Dosage, and Safety Explained
Lactobionic acid (LBA) is a next-generation polyhydroxy “bionic” acid created by linking galactose to gluconic acid. In skin care, it behaves like a gentle,...
Lactococcus lactis: Immune Support, Skin Barrier Effects, Uses, Dosage, and Safety
Lactococcus lactis is a workhorse bacterium behind many traditional cheeses and cultured dairy foods—and it is increasingly showing up in dietary supplements. Unlike widely...
Lactoferrin: Immune Support and Iron Balance, Practical Dosage Guidelines, Uses, and Side Effects
Lactoferrin is a multifunctional iron-binding protein found in human milk, colostrum, tears, and saliva—and produced commercially from bovine whey. It acts like a Swiss-army...
Lactoglobulin: Muscle Building and Recovery, Practical Dosage Guidelines, Uses, and Side Effects
Lactoglobulin—most commonly β-lactoglobulin (BLG)—is the major whey protein in cow’s milk and a workhorse ingredient in modern nutrition. As a compact lipocalin protein rich...
Lactoperoxidase: Evidence-Based Benefits for Teeth and Milk Preservation, How to Use, and Risks
Lactoperoxidase (LPO) is a heme-containing enzyme found in milk, tears, and saliva where it forms part of the body’s front-line antimicrobial defense. In the...
Lactucarium: Sleep Benefits, How It Works, Recommended Dosage, and Safety
Lactucarium is the dried white latex collected from wild lettuce (most notably Lactuca virosa, but also related species). Sometimes called “lettuce opium,” it does...
Lactulose: Health Benefits for Constipation and Hepatic Encephalopathy, How It Works, Dosage, and Safety
Lactulose is a non-absorbable synthetic disaccharide used worldwide as a gentle osmotic laxative and as first-line therapy for hepatic encephalopathy (HE) in people with...
L-Alanine: Metabolic Benefits, How It Works, Practical Dosage, and Safety Explained
L-Alanine is a nonessential α-amino acid that your body can make from other nutrients, especially from pyruvate during normal carbohydrate metabolism. In foods, it...
L-alpha-Glycerylphosphorylcholine: Cognitive Support, Evidence for Motivation and Focus, Dosage, and Side Effects
L-alpha-Glycerylphosphorylcholine (often shortened to alpha-GPC) is a choline-containing compound naturally present in small amounts in the brain and in certain foods. As a supplemental...
Laminaria japonica extract: Metabolic Support, Weight and Lipid Effects, Best Practices, and Side Effects
Laminaria japonica—better known as kombu—is a cultivated brown seaweed long used in East Asian cuisine and traditional health practices. Modern extracts concentrate its water-soluble...
Lanolin: Skin Benefits, How It Works, Best Uses, Dosage Tips, and Safety
Lanolin—sometimes called wool wax or wool fat—is a complex, semi-solid blend of waxy esters naturally produced by sheep to waterproof their fleece. Purified for...
Lapacho: Immune and Inflammation Support, Best Ways to Use, Dosage Ranges, and Risks
Lapacho—also called pau d’arco, taheebo, or pink trumpet tree bark—is a traditional South American herbal remedy made from the inner bark of Handroanthus/Tabebuia trees....
L-Arabinose: Sweetener Properties, Metabolic Benefits, Recipe Tips, Dosage Advice, and Safety
L-arabinose is a naturally occurring “rare sugar” found in plant fibers such as hemicellulose. As a supplement or functional ingredient, it’s prized for one...
L-Arginine: Cardiovascular and Sexual Health Benefits, Practical Dosing, and Risks Explained
L-arginine is a conditionally essential amino acid that your body uses to make nitric oxide—a messenger that relaxes blood vessels and influences circulation, blood...