L-arginine, an amino acid, is integral to the production of nitric oxide in our body, a molecule that contributes to the relaxation and dilation of blood vessels. As such, it is often sought-after ...

More specifically, most nitric oxide boosters contain the active ingredients L-arginine and L-citrulline. These amino acids act as biological “building blocks” for nitric oxide within your body.

Meet the latest obsession in anti-aging. We've consulted experts to learn about the benefits of NAD supplements and the best NAD brands to try — including Wonderfeel, Tru Niagen, and more.

It's no fishy proposition — adding the best fish oil or other omega-3 rich supplement to your diet could help protect your heart. Our registered dietitian tested eight high-quality options to ...

Explore the best iron supplements for anemia, a sensitive stomach, plant-based and vegan diets, and more. Plus experts share insight on iron deficiency.

Learn more about the essential nutrients women need in their diet and discover the best supplements and vitamins for women, according to nutrition experts.

Melatonin supplements offer a short-term solution for people struggling to fall or stay asleep. We consulted sleep experts ...

Check out our top picks for the best creatine supplements on the market, vetted by experts and gym bros.

According to the Arthritis Foundation, glucosamine is commonly sold in combination with chondroitin as a single supplement, and both are two of the most commonly used supplements for arthritis.

The best type of protein powder is the one that’s best for your specific wants and needs, whether that’s gaining muscle, losing weight, plant-based options, easy-digesting options, etc.

Our dietitians and testers rounded up the 12 best protein powders. See the products that made our list and get tips on how to use protein powder.