Lavender oil: Calming Properties for Stress and Sleep, Best Forms, Dosage Ranges, and Risks
Lavender oil, distilled from the flowering tops of Lavandula angustifolia, is one of the most studied and widely used essential oils. It’s prized for...
L-Carnitine: Uses for Energy, Recovery, Male Fertility, and Safe Dosing
L-carnitine is a conditionally essential nutrient that shuttles long-chain fatty acids into mitochondria—the “furnaces” of your cells—so they can be burned for energy. Your...
L-Carnosine: Mechanism, Proven Benefits, How to Supplement, and Potential Side Effects
L-carnosine is a naturally occurring dipeptide made of beta-alanine and histidine. It’s concentrated in tissues that work hard and fast—skeletal muscle, heart muscle, and...
L-Citrulline: Blood Flow Support, Exercise Performance, Recommended Dosages, and Side Effects
L-citrulline is a naturally occurring amino acid your body uses to make nitric oxide (NO)—a messenger that widens blood vessels, supports healthy blood pressure,...
L-Cysteine: Uses for Recovery and Skin and Hair, Optimal Dosage, and Safety Precautions
L-cysteine is a sulfur-containing amino acid your body uses to build proteins, maintain antioxidant defenses, and keep tissues—especially skin, hair, and nails—resilient. As a...
Lecithin: What It Is, Proven Benefits, How to Take It, and Safety Tips
Lecithin is a family of phospholipids best known for their role as natural emulsifiers in foods and supplements. In the body, lecithin provides building...
Leptadenia Reticulata: Traditional Medicine Insights, Modern Research, Dosage Ranges, and Safety
Leptadenia reticulata—known in Ayurveda as Jeevanti—is a climbing herb traditionally valued to support vitality, female reproductive health, and recovery from fatigue. Modern laboratory studies...
Leptin Peptide: Benefits for Lipodystrophy, How It Works, Dosage Guidance, and Safety
Leptin is a hormone that helps the brain gauge the body’s energy stores and regulate appetite, metabolism, and many downstream pathways. A “leptin peptide”...
L-Ergothioneine: Antioxidant Properties, Uses for Eyes and Brain, Dosage, and Side Effects
L-ergothioneine (often shortened to “ergothioneine” or “ET”) is a unique, diet-derived amino acid found in mushrooms and some beans. Humans do not synthesize it;...
Leuconostoc mesenteroides: Fermentation Roles, Proven Benefits, How to Use It, Dosage, and Risks
Leuconostoc mesenteroides is a lactic acid bacterium best known for shaping the flavor, texture, and safety of fermented foods such as kimchi, sauerkraut, and...
Leucovorin: Clinical Uses, Optimal Dosage in Cancer Care, Timing Strategies, and Safety Considerations
Leucovorin—also called folinic acid—is a reduced form of folate used as a rescue agent, chemotherapy modulator, and folate replacement in very specific medical settings....
Levocarnitine: Clinical Uses for Deficiency and Dialysis, Fertility Insights, Dosing, and Side Effects
Levocarnitine (L-carnitine) is a conditionally essential compound that shuttles long-chain fatty acids into mitochondria so your cells can turn fat into usable energy. Your...
Levothyroxine: Hypothyroidism Treatment Explained, Proper Use, Dose Adjustments, and Risks
Levothyroxine is a synthetic form of thyroxine (T4), the primary hormone your thyroid gland makes to set the pace of metabolism. When the thyroid...
L-Fucose: Health Benefits, Mechanisms, Medical Uses, Dosage, and Safety
L-fucose is a six-carbon deoxy sugar that your body uses to decorate thousands of proteins and lipids with “fucosylation” marks. Those tiny chemical tags...
L-Glutamic Acid: Uses for Brain Health and Gut Support, Recommended Dosage, and Side Effects
L-glutamic acid—often shortened to glutamate when it appears in its ionized form—is a conditionally nonessential amino acid central to how your body turns food...
L-Glutamine: Gut Health Support, Immune Function, Dosage Guidance, and Side Effects
L-glutamine is the most abundant free amino acid in human blood and muscle. Your body makes it, yet demand can outpace supply during heavy...