Lutein is commonly taken by mouth to prevent eye diseases, including cataracts and a disease that leads to vision loss in older adults (age-related macular degeneration or AMD). Lutein is used for many other conditions, but there is no good scientific evidence to support these other uses.

Spirulina is a type of algae associated with many health benefits, thanks to its nutrient profile and powerful antioxidant properties. Spirulina is among the world’s most popular supplements. It is loaded with various nutrients and antioxidants that may benefit your body and brain. Here are 10 evidence-based health benefits of spirulina.

Creatine is an amino acid located mostly in your body's muscles as well as in the brain. Most people get creatine through seafood and red meat — though at levels far below those found in synthetically made creatine supplements. The body's liver, pancreas and kidneys also can make about 1 gram of creatine per day. Your body stores creatine as phosphocreatine primarily in your muscles, where it's used for energy. As a result, people take creatine orally to improve athletic performance and increase muscle mass. People also use oral creatine to treat certain brain disorders, neuromuscular conditions, congestive heart failure and other conditions. Topical creatine might be used to treat aging skin

Cordyceps is a genus of fungi that may have anti-aging and exercise performance benefits, among several others.

Glutamine is an important amino acid with many functions in the body. It is a building block of protein and a critical part of the immune system. What’s more, glutamine has a special role in intestinal health. Your body naturally produces this amino acid, and it is also found in many foods. Yet, you may be unsure if you need extra glutamine from supplements for optimal health.

Chaga mushroom (Inonotus obliquus) is a type of fungus that grows mainly on the bark of birch trees in cold climates, such as Northern Europe, Siberia, Russia, Korea, Northern Canada and Alaska. For centuries, chaga has been used as a traditional medicine in Russia and other Northern European countries, mainly to boost immunity and overall health. It has also been used to treat diabetes, certain cancers and heart disease.

MSM is a chemical in animals, humans, and many plants. People use it most often to try to treat arthritis.