Be sure to talk to your healthcare provider before doing this. Beta-carotene may reduce the risk of some types of cancer, such as prostate cancer. But more research is needed to know the effects of vitamin A on other types of cancer. It may reduce the risk of heart disease and stroke. However, studies seem to show that neither beta-carotene nor vitamin A help prevent coronary heart disease.
One study found a higher risk of lung cancer in smokers and workers exposed to asbestos when they had more beta-carotene. There are no Dietary Reference Intakes for beta-carotene. The Recommended Dietary Allowances for vitamin A are noted below. This table notes the IU of vitamin A in foods. It also notes the percentage of your daily value of vitamin A that the food meets.
Eating more fruits and vegetables can help you get more beta-carotene. Red, orange, deep yellow, and dark green produce tends to be high in carotenoids. Vitamin A deficiency can cause symptoms such as, night blindness, fatigue, skin issues, and a weakened immune system. Severe vitamin A problems can lead to blindness.
This is a leading cause of blindness in some parts of the world. But high doses over a long time can lead to carotenemia. This causes your skin to become yellowish orange. Too much beta-carotene is a problem for some people.
This includes people who can't convert beta-carotene to vitamin A. This can happen to people who have hypothyroidism. Higher doses of vitamin A may increase the risk for fractures in both women past menopause, and in men. High dose supplements with preformed vitamin A are not recommended during pregnancy. Too much may cause birth defects or miscarriage. Although she was resuscitated by ventricular fibrillations a few times, she stopped responding to medication three days later.
Star fruit poisoning was first described in in Malaysia, where it was found to have a depressive effect on the central nervous system. Although star fruits also known as carambolas are not as common in North America, it is widely available in Southeast Asia and South America as fresh fruits, in salads and pickled juice. This uniquely shaped fruit poses very little risk to healthy people when eaten in normal quantities. However, acute kidney failure has been reported in people with a history of kidney diseases.
In a case report published in the Journal of Nephrology, a patient with underlying chronic kidney disease developed a bad reaction after eating star fruit, which led to rapid deterioration in kidney function and permanent renal injury.
In a similar case reported in the Hong Kong Medical Journal in , a year-old woman with chronic renal disease was admitted to the hospital in a state of mental drowsiness and accelerated heart rate after eating two star fruits. Common symptoms for star fruit intoxication include hiccups the most common symptom, especially in mild intoxication , vomiting, weakness, insomnia, altered consciousness, convulsions and hypotension. People with a history of kidney illnesses should avoid pure, sour star fruit juice a popular beverage in Taiwan and mild, diluted pickled juice in large amounts, especially on an empty stomach.
The conventional guideline of drinking eight glasses of water a day has proven to be a myth. But there is such thing as drinking too much water. Water intoxication occurs when a person drinks so much that the water dilutes the concentration of sodium in the blood, creating an electrolyte imbalance. Water intoxication, known as hyponatremia, is mostly a risk for endurance athletes.
A article in the New England Journal of Medicine found that 13 percent of runners in the Boston Marathon developed hyponatremia from drinking too much water. According to the researchers, a relatively simple strategy to reduce that risk would be for runners to weigh themselves before and after training runs, in order to gauge their overall fluid intake and ensure they do not drink too much water during exercise.
An unusual and fatal case of water intoxication occurred in when a California woman reportedly drank too much water during a "Hold Your Wee for a Wii" radio station contest.
The light dusting of nutmeg on your eggnog has practically no effects aside from making your beverage more delicious. However, trouble kicks in when the spice is consumed in excessive quantities as a low-cost hallucinogenic drug. Unpleasant side effects usually appear three to eight hours after ingestion, and can include anxiety, fear, and a feeling of impending doom. However, keep in mind that, unlike foods rich in beta carotene, beta carotene supplements have different effects on health and may lead to negative effects.
The UL for preformed vitamin A is set at 3, mcg for both men and women, including women who are pregnant or breastfeeding. Discuss certain medications or lifestyle factors that may influence dosing and needs. Adults should generally get between and mcg RAE of vitamin A per day. According to the National Center for Complementary and Integrative Health NCCIH , beta carotene supplements are not linked with major negative effects, even with large supplement doses of —30 mg per day.
Over time, eating extremely high amounts beta carotene can result in a harmless condition called carotenodermia, where the skin turns a yellow-orange color. People who smoke, and possibly those who used to smoke, should avoid beta carotene supplements and multivitamins that provide more than percent of their daily value for vitamin A, either through preformed retinol or beta carotene.
This is because studies have linked high supplement doses of these nutrients with an increased risk of lung cancer in people who smoke. Health experts usually recommend eating a diet rich in fruits and vegetables, which are full of antioxidants as well as other important nutrients over taking beta carotene supplements. Beta carotene supplements are generally safe, but they may present risks for people who smoke or used to smoke. Dietary sources are generally recommended over supplementation.
Beta carotene is an important dietary compound and an important source of vitamin A. Research has linked beta carotene intake with various health benefits. Eating a diet rich in fruits and vegetables is the best way to increase your beta carotene intake and prevent disease. Talk with your doctor or registered dietitian about specific ways to increase your intake of beta carotene.
This tasty, although odd-looking, melon is packed with nutrients. Its health benefits might surprise you. The carrot is a root vegetable that is often claimed to be the perfect health food.
It is highly nutritious, and loaded with fiber and antioxidants. Sweet potatoes and yams are both tuber vegetables, but they're actually quite different. This article explains the key differences between sweet…. Antioxidants are incredibly important, but most people don't really understand what they are. This article explains it all in human terms. Carotenoids are the bright-colored pigments in some of your favorite fruits and veggies.
Learn about how they impact your immune system and health. Vitamin D has numerous health benefits, but it's tricky to know which supplement to choose. Here are 13 of the best vitamin D supplements, according…. This is a detailed review of vitamin D toxicity and how much vitamin D is considered too much.
Toxicity is rare, but can occur with extremely high…. When taken in safe doses, magnesium can effectively prevent migraines for many people.
0コメント