L-Glutathione: Proven Benefits, Optimal Dosage, Best Forms, and Side Effects
L-glutathione (often shortened to “glutathione” or “GSH”) is a small tripeptide that the body makes from glutamate, cysteine, and glycine. It works everywhere in...
L-Glycine: Sleep, Collagen Support, Dosage Guidelines, and Safety Explained
Glycine is the simplest amino acid—small, neutral, and everywhere in your body. It builds collagen, helps synthesize glutathione (your cell’s primary antioxidant), and serves...
L-Histidine: Metabolic Health, Skin Barrier Support, Dosing Strategies, and Side Effects
L-histidine is an essential amino acid with outsized impact for a small molecule. Beyond helping build proteins, it is a precursor to histamine (immune...
L-Hydroxyproline: Skin and Joint Support, Evidence, Daily Intake, and Side Effects
L-hydroxyproline (often shortened to “hydroxyproline”) is a collagen-specific amino acid that gives connective tissues—skin, tendons, cartilage, bone, and blood vessels—their tensile strength and resilience....
Lignan extract: Cardiometabolic Support, Evidence-Based Uses, Recommended Dosages, and Side Effects
Lignan extract concentrates a family of plant polyphenols—most famously the flaxseed lignan secoisolariciresinol diglucoside (SDG)—that the gut microbiome converts into “enterolignans” such as enterolactone...
Lignoceric acid: Skin Barrier Benefits, Ceramide Science, Practical Uses, Dosage Notes, and Side Effects
Lignoceric acid (also called tetracosanoic acid or C24:0) is a very long-chain saturated fatty acid that shows up in small amounts in many natural...
Ligusticum chuanxiong: Evidence-Based Benefits, Uses for Headaches and Menstrual Comfort, Dosage, and Side Effects
Ligusticum chuanxiong—often called chuanxiong or Szechuan lovage—is a classic herb in East Asian medicine used to “move blood,” calm headaches, and ease menstrual discomfort....
Ligusticum porteri: Traditional Respiratory Support, Evidence, Recommended Dosage, and Side Effects
Ligusticum porteri—better known as osha—has a long record of use in the Rocky Mountains and northern Mexico for seasonal respiratory complaints, throat and chest...
Ligustrum lucidum Extract: Liver and Bone Support, Evidence Summary, Dosage, and Precautions
Ligustrum lucidum—better known as glossy privet fruit or Nu Zhen Zi—is a classic herb in Traditional Chinese Medicine (TCM) that has gained modern interest...
Limonene: Evidence-Based Benefits, Uses in Wellness and Skincare, Dosage, and Side Effects
Limonene is a citrus-scented compound found in orange, lemon, and grapefruit peels, prized for its fresh aroma and broad utility. As a dietary supplement...
Limonin: Antioxidant and Anti-Inflammatory Properties, Practical Uses, Dosage, and Safety
Limonin is a bioactive compound that gives some citrus fruits their characteristic bitterness. Belonging to a family of triterpenes called limonoids, it occurs naturally...
Lingonberry extract: Oral Health Support, Blood Pressure Insights, Dosage, and Safety Considerations
Lingonberry (Vaccinium vitis-idaea) is a small, tart, evergreen berry native to boreal forests. Its bright red skins are packed with polyphenols—especially proanthocyanidins, anthocyanins, flavonols...
Lingzhi: Evidence-Based Benefits, How to Use It, Recommended Dosage, and Safety
Lingzhi—also known as reishi and most often identified with the species Ganoderma lucidum in supplements—is a woody, bitter mushroom long used in East Asian...
Lion’s mane mushroom extract: Science-Backed Benefits for Focus and Memory, Dosage, and Risks
Lion’s mane (Hericium erinaceus) is a distinctive white, shaggy mushroom valued both as food and as a focused extract for brain and nerve support....
Lipase: Digestive Enzyme Benefits, PERT Guidelines, Meal Timing, and Risks
Lipase is the fat-digesting workhorse of your digestive system. Produced mainly by the pancreas and secreted into the small intestine, lipase breaks dietary triglycerides...
Liposomal Glutathione: Science-Backed Benefits for Immune and Redox Health, Dosage, and Risks
Glutathione (GSH) is the body’s primary intracellular antioxidant. It helps neutralize reactive oxygen species, recycles vitamins C and E, supports detoxification in the liver,...