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Results 601-620 of 3196

NatMed
Black Psyllium
Black psyllium comes from the seed husks of the Plantago arenaria plant. It contains high amounts of soluble dietary fiber. Black psyllium adds bulk to the stool which might help with constipation, diarrhea, and irritable bowel syndrome (IBS). It also controls how quickly sugars are absorbed from the gut, which might help control blood sugar levels in people with diabetes. People commonly use black psyllium for treating and preventing constipation. It is also used for diarrhea, obesity, diabetes, high blood pressure, and many other conditions, but there is no good scientific evidence to support most of these uses. Don't confuse black psyllium with blond psyllium. These are not the same.
NatMed
Vitex agnus-castus
Vitex agnus-castus, or "chaste tree," is a shrub native to the Mediterranean and Asia. The fruit has been historically used for reducing sexual desire. Vitex agnus-castus fruit and seed contain chemicals that seem to affect many hormones involved in the female reproductive cycle. People use vitex agnus-castus for conditions related to the menstrual cycle such as breast pain and premenstrual syndrome (PMS). It is also used for bone fractures, infertility, menopause symptoms, and many other conditions, but there is no good scientific evidence to support most of these uses.
NatMed
American Ginseng
American ginseng (Panax quinquefolius) is an herb that grows mainly in North America. It's an endangered species in some states due to high demand. American ginseng is considered an adaptogen. Adaptogens are a class of substances that are believed to stimulate the body's resistance to physical, environmental, and emotional stressors. American ginseng also contains chemicals called ginsenosides, which seem to affect insulin levels and lower blood sugar. People take American ginseng for stress, to boost the immune system, for upper airway infections, diabetes, and many other conditions, but there is no good scientific evidence to support most of these uses. Don't confuse American ginseng with Asian ginseng (Panax ginseng) or Eleuthero (Eleutherococcus senticosus). These are different plants with different effects.
NatMed
Lecithin
Lecithin is a mixture of fats that are essential to cells in the human body. It can be found in many foods, including soybeans and egg yolks. In the diet, lecithin is the main source of choline, a nutrient similar to the B vitamins. Lecithin is converted into acetylcholine, a substance that transmits nerve impulses. People use lecithin for Alzheimer disease and dementia, Parkinson disease, and many other conditions, but there is no good scientific evidence to support these uses.
NatMed
Thiamine
Thiamine (vitamin B1) is found in many foods and is used to treat low thiamine, beriberi, certain nerve diseases, and Wernicke-Korsakoff syndrome (WKS). Thiamine is required by our bodies to properly use carbohydrates. It also helps maintain proper nerve function. It's found in foods such as yeast, cereal grains, beans, nuts, and meat. It's often used in combination with other B vitamins, and is found in many vitamin B complex products. People take thiamine for conditions related to low levels of thiamine, including beriberi and inflammation of the nerves (neuritis). It's also used for digestive problems, diabetic nerve pain, heart disease, and other conditions, but there is no good scientific evidence to support these other uses.
NatMed
Vitamin A
Vitamin A is a fat-soluble vitamin. Its different forms are often called "retinoids." They include retinol, retinal, retinoic acid, and retinyl ester. Vitamin A is needed for the proper growth and functioning of many parts of the body, including the eyes, skin, and immune system. It can be found in many foods, including liver, eggs, whole milk, butter, fortified margarine, meat, and oily saltwater fish. The body can also make vitamin A from carotenoids, which are a group of chemicals found in some plants, especially certain orange, red, and green fruits and vegetables. People most commonly use vitamin A for treating vitamin A deficiency. It is also used for aging skin, acne, HIV/AIDS, cataracts, child development, infections, and many other conditions.
NatMed
Astragalus
Astragalus (Astragalus membranaceus) is a type of flowering plant. The root has been used for centuries in traditional Chinese Medicine (TCM). Astragalus is considered an adaptogen. Adaptogens are a class of natural substances that are believed to stimulate the body's resistance to physical, environmental, and emotional stressors. The chemicals in astragalus also seem to stimulate the immune system and reduce swelling. People commonly use astragalus for hay fever, diabetes, kidney disease, and many other conditions, but there is no good scientific evidence to support these uses. There is also no good evidence to support using astragalus for COVID-19. There are many species of astragalus. Some species contain a nerve toxin and have been linked to livestock poisonings. These include Astragalus lentiginosus, Astragalus mollissimus, and others. But these species usually aren't found in dietary supplements. Most astragalus supplements contain Astragalus membranaceus. Also, don't confuse astragalus with tragacanth. These are different plants.
NatMed
Ginger
Ginger (Zingiber officinale) is a plant native to Asia. The ginger spice comes from the roots of the plant. It's used as a food flavoring and medicine. Ginger contains chemicals that might reduce nausea and swelling. These chemicals seem to work in the stomach and intestines, but they might also help the brain and nervous system to control nausea. People commonly use ginger for menstrual cramps, osteoarthritis, and morning sickness. It is also used for diabetes, motion sickness, and many other conditions, but there is no good scientific evidence to support most of these uses. There is also no good evidence to support using ginger for COVID-19.
NatMed
Green Tea
Green tea is made from the Camellia sinensis plant. Its dried leaves and leaf buds are used to make several different teas, including black and oolong teas. Green tea is prepared by steaming and pan-frying the Camellia sinensis leaves and then drying them. Green tea is not fermented, so it's able to maintain important molecules called polyphenols, which seem to be responsible for many of its benefits. It also contains caffeine. People commonly use a US FDA-approved prescription product containing green tea for genital warts. As a drink or supplement, green tea is sometimes used for high cholesterol, high blood pressure, to prevent heart disease, and to prevent ovarian cancer. It is also used for many other conditions, but there is no good scientific evidence to support most of these uses.
NatMed
Safflower
Safflower (Carthamus tinctorius) is a plant that grows throughout the world. Its seed oil is a rich source of the essential fatty acid, linoleic acid. The linoleic acid in safflower oil might help reduce the risk of heart disease. Safflower also contains chemicals that might help prevent blood clots, widen blood vessels, lower blood pressure, and stimulate the heart. People use safflower oil for high cholesterol, heart disease, stroke, diabetes, and many other conditions, but there is no good scientific evidence to support most of these uses.
NatMed
Osha
Osha (Ligusticum porteri) is a plant that grows in Northern America. It has been traditionally used as medicine in Native American and Hispanic cultures. Osha contains chemicals that might help fight bacterial and viral infections, and it has traditionally been used for these purposes. Be careful not to confuse osha with poisonous hemlock. The leaves of the two plants are very similar. Be sure to buy osha from a reputable source. Some people use osha for respiratory tract infections, skin infections, and viral infections such as herpes and HIV/AIDS. But there is no good scientific evidence to support these uses.
NatMed
Cranberry
Cranberry (Vaccinium macrocarpon) is an evergreen shrub that grows in bogs in North America. It produces dark red fruits that contain salicylic acid. Chemicals in cranberries keep bacteria from sticking to the cells in the urinary tract. But they don't seem to be able to remove bacteria that are already stuck to these cells. This might explain why cranberry helps prevent urinary tract infections (UTIs), but doesn't help treat them. People commonly use cranberry to prevent UTIs. Cranberry is also used for kidney stones, enlarged prostate, the common cold, and many other conditions, but there is no good scientific evidence to support these uses. Don't confuse cranberry with cramp bark, lingonberry, or uva ursi. These are sometimes also called cranberry but they are not the same.
NatMed
Riboflavin
Riboflavin is vitamin B2. It is widely found in both plant- and animal-based foods, including milk, meat, eggs, nuts, enriched flour, and green vegetables. Riboflavin is involved in many body processes. It's required for the proper development of the skin, lining of the digestive tract, blood cells, and brain function. People commonly use riboflavin to prevent riboflavin deficiency. It is also used for acne, muscle cramps, and many other conditions, but there is no good scientific evidence to support most of these uses.
NatMed
Shark Liver Oil
Shark liver oil comes from the livers of different types of sharks. It is used as a source of compounds called alkylglycerols, which are a type of fat. The alkylglycerols in shark liver oil might have anticancer effects and help boost the immune system. People use shark liver oil for cancer, chemotherapy side effects, common cold, the flu, wound healing, and many other conditions, but there is no good scientific evidence to support these uses. Don't confuse shark liver oil with other marine oils, including cod liver oil, fish oil, or krill oil. Also don't confuse it with other products that come from sharks, including liver extract, shark cartilage, and squalamine. These are not the same.
NatMed
Willow Bark
Willow bark comes from several varieties of willow tree, including white (Salix alba or European), black (Salix nigra or pussy), crack, and purple willow. Willow bark contains a chemical called salicin, which is similar to aspirin. It has pain and fever reducing effects in the body. People commonly use willow bark for back pain, osteoarthritis, fever, flu, muscle pain, and many other conditions, but there is no good scientific evidence to support most of these uses. There is also no good evidence to support using willow bark for COVID-19.
NatMed
Vitamin E
Vitamin E is a vitamin that dissolves in fat. It is found in many foods including vegetable oils, cereals, meat, poultry, eggs, and fruits. Vitamin E is an important vitamin required for the proper function of many organs in the body. It is also an antioxidant. Vitamin E that occurs naturally in foods (RRR-alpha-tocopherol) is different from man-made vitamin E that is in supplements (all-rac-alpha-tocopherol). Vitamin E is used for treating vitamin E deficiency, which is rare, but can occur in people with certain genetic disorders and in very low-weight premature infants. Vitamin E is also used for depression, high blood pressure, and many other conditions, but there is no good scientific evidence to support many of these other uses.
NatMed
Ashwagandha
Ashwagandha is an evergreen shrub that grows in Asia and Africa. It is commonly used for stress. There is little evidence for its use as an "adaptogen." Ashwagandha contains chemicals that might help calm the brain, reduce swelling, lower blood pressure, and alter the immune system. People commonly use ashwagandha for anxiety, insomnia, and stress. It is also used for asthma, athletic performance, back pain, and many other conditions, but there is no good scientific evidence to support most of these uses. There is also no good evidence to support using ashwagandha for COVID-19. Don't confuse ashwagandha with Physalis alkekengi. Both are known as winter cherry. Also, don't confuse ashwagandha with American ginseng, Panax ginseng, or eleuthero.
NatMed
Apricot
Apricot (Prunus armeniaca) is a small tree that grows a fruit that is commonly eaten as food. The fruit, juice, and leaves have also been used as medicine. Apricot is used for asthma, constipation, infertility, and other conditions, but there is no good scientific evidence to support any use. Do not confused apricot with the kernel inside of the fruit (apricot kernel) or with Japanese apricot. These are not the same.
NatMed
German Chamomile
German chamomile (Matricaria recutita) is an herb that is native to southern and eastern Europe. It is popular throughout the world as a medicine. German chamomile contains chemicals that seem to promote relaxation and reduce swelling. It was used by the ancient Greeks, Romans, and Egyptians, and is still commonly used today. People use German chamomile for common cold, indigestion, anxiety, excessive crying in infants (colic), and many other conditions, but there is no good scientific evidence to support these uses. Do not confuse German chamomile with Roman chamomile, which is a different plant.
NatMed
Gamma-Hydroxybutyrate (GHB)
Gamma hydroxybutyrate (GHB) is a chemical that is found in the brain and made in a lab. It has sedative effects. It's illegal for use in dietary supplements. GHB acts on several nerve pathways in the brain and has been used in drug-facilitated sexual assault and as a party drug. Due to safety concerns, it is a Schedule I controlled substance, making it illegal. A prescription form of GHB called sodium oxybate (Xyrem) is used for treating excessive daytime sleepiness (narcolepsy). People also use GHB for alcohol use disorder, opioid withdrawal, depression, and other conditions, but there is no good scientific evidence to support these uses.