Vitamin K2 and Artery Calcification: What Two 2026 Trials Found
Category: Supplements
Taurine Supplementation: What the Research Actually Shows
There's a popular ingredient in energy drinks that's recently been gaining serious attention for its potential to support healthy aging and key health parameters. Does the research support the hype...
L-Lysine Benefits, Dosing, Forms, and Side Effects: Evidence Review
Lysine (L-lysine) is one of nine essential amino acids that the human body cannot synthesize and must obtain from dietary sources [1][2]. It plays fundamental roles in protein synthesis, collagen f...
Lycopene: Evidence-Based Guide to Benefits, Forms, and Dosing
Lycopene is a fat-soluble red pigment and carotenoid antioxidant found in tomatoes, watermelon, pink grapefruit, guava, and apricots. It is one of the most potent biological antioxidants identified...
Collagen Peptides for Skin Wrinkles: Evidence, Dosing, and How They Work
There are loads of products on the market promising to reduce wrinkles. For many of them, it's just unproven hype. But there's one supplement the research consistently supports for reducing wrinkle...
Lutein and Zeaxanthin: Eye Health Evidence, Forms, Dosing and Safety
Lutein and zeaxanthin are xanthophyll carotenoid pigments — a subclass of the carotenoid family that also includes beta-carotene and lycopene. These compounds are the only carotenoids found in high...
Lithium Supplements: Forms, Dosing, and Safety Guide
Lithium is a naturally occurring alkali metal and trace mineral found in varying concentrations in soil, water, and certain foods. While not classified as an "essential" mineral (no established bio...
Lion's Mane and Chaga Mushrooms: Benefits, Dosing, and Safety
Lion's mane (Hericium erinaceus) and chaga (Inonotus obliquus) are two fungi with long histories of use in traditional medicine, particularly in East Asia and Northern Europe. Both are widely marke...
4 Supplements With Hidden Side Effects — What the Clinical Evidence Shows
Four popular supplements are widely marketed for health benefits as people age — but the clinical evidence tells a different story. Research suggests resveratrol, metformin (in non-diabetic individ...
DGL and Licorice Root: Forms, Evidence, Dosing, and Safety
Licorice root, derived from the perennial plant Glycyrrhiza glabra (from the Greek glykos meaning "sweet" and rhiza meaning "root"), has been used in traditional medicine for thousands of years. Th...
L-Tryptophan and 5-HTP: Evidence Guide to Forms, Dosing, and Safety
Table of Contents Overview Forms and Bioavailability Evidence for Benefits Recommended Dosing Safety and Side Effects Drug Interactions Dietary Sources References Overview L-Tryptophan is one of ...
L-Theanine: Evidence-Based Guide to Benefits, Dosing, and Safety
L-theanine (gamma-glutamylethylamide) is a water-soluble, non-proteinogenic amino acid found primarily in the leaves of Camellia sinensis — the plant that produces green tea, black tea, and white t...
L-Citrulline: Evidence-Based Guide to Benefits, Forms, and Dosing
Table of Contents Overview Forms and Bioavailability Evidence for Benefits Recommended Dosing Safety and Side Effects Drug Interactions Dietary Sources References Overview L-citrulline is a non...
Cholesterol-Lowering Supplements: Evidence-Based Review of Benefits, Forms, and Dosing
Table of Contents Overview Forms and Bioavailability Evidence for Benefits Recommended Dosing Safety and Side Effects Drug Interactions Dietary Sources References Overview Elevated blood choles...
Gummies vs Capsules: Which Supplement Form Is Actually Better?
Choosing a supplement is often just the beginning — the next decision is which form to take it in. Supplements come in many delivery formats, and the choice affects not just convenience but also do...
Iodine and Kelp Supplements: Benefits, Forms, Dosage, and Safety
Iodine is a trace element that is an essential component of the thyroid hormones thyroxine (T4) and triiodothyronine (T3) [1][2]. These hormones regulate many critical biochemical reactions, includ...
Iron Supplements: Evidence Guide to Benefits, Forms, Dosing, and Safety
Iron is an essential mineral required in small amounts for a wide range of critical physiological functions. It is a core component of hemoglobin, the erythrocyte (red blood cell) protein responsib...
Huperzine A: Evidence Review — Benefits, Dosing, and Safety
Table of Contents Overview Forms and Bioavailability Evidence for Benefits Recommended Dosing Safety and Side Effects Drug Interactions Dietary Sources References Overview Huperzine A is a natu...
Trace Minerals in Multivitamins: What They Are and Why Dosing Matters
There was a time when vitamins were vitamins — if you wanted more than a basic B complex, you needed a whole roster of separate pills and supplements. Eventually, researchers began formulating mult...
Holy Basil (Tulsi): Evidence-Based Guide to Benefits, Dosing, and Safety
Holy basil (Ocimum sanctum or Ocimum tenuiflorum) is a shrub in the basil family (Lamiaceae) thought to have originated in the Indian subcontinent. In traditional Ayurvedic medicine, holy basil is ...
Skin Tightening Supplements: Hyaluronic Acid and Collagen Peptides Evidence Guide
Aging is one of the few constants in life. The passage of time affects everyone, though not always equally — differences in genetics, in exposure to ultraviolet radiation and environmental contamin...
Greens Powders: Evidence-Based Review of Benefits, Dosing, and Safety
Greens powders — also called super greens or green superfood powders — are dietary supplements consisting of dehydrated and pulverized vegetables, fruits, grasses, algae, and other plant-based ingr...
Green Tea & EGCG: Evidence-Based Guide to Benefits, Forms, Dosing, and Safety
Green tea is made from the leaves of Camellia sinensis, the same plant used to produce black and oolong teas. The difference lies in processing: green tea leaves are lightly steamed or pan-fired to...
Green Coffee Bean Extract: Evidence, Dosing, and Side Effects
Green coffee bean extract (GCE) is a dietary supplement derived from unroasted beans of Coffea species, primarily Coffea arabica and Coffea canephora (robusta). Unlike roasted coffee, which loses t...
Glycine Supplement Guide: Benefits, Forms, Dosage, and Side Effects
Glycine is the smallest and simplest amino acid found in the human body, with the molecular formula C₂H₅NO₂ and systematic name 2-aminoacetic acid [1][2]. Unlike all other standard amino acids, gly...