Vitamin C is an important micronutrient in the human diet. It has a role in sustaining memory, helping prevent cell mutations and premature aging, preventing oxidation of fatty foods, and supporting the immune system. Some people believe that vitamin C cures or stops the common cold, but there is no strong scientific evidence proving that this is true. What is more likely is that through its immune system-boosting power, vitamin C provides extra defense against cold-causing pathogens,  so it may ease the cold and perhaps shorten its duration, but it's not likely to prevent it. Most people should be able to get adequate vitamin C from a healthy, nutritionally optimized diet. If you're eating nothing but fast food, you probably aren't going to get a beneficial amount of vitamin C as part of your diet. However, simply changing your diet for the better can help you increase vitamin C intake. Since vitamin C counteracts some of the inhibitors in foods, such as phytates in whole grains and tannins in teas and coffee, increasing your vitamin C intake can also help optimize your diet for a healthier lifestyle. Stress can be brought about due to a depletion of vitamin C, and ongoing stress uses up vitamin C rapidly, so eating foods high in vitamin C or taking a vitamin C supplement when you are feeling stressed can be a positive contribution to your diet and well-being. If you are aware of what you are consuming and the micronutrients that those foods contain, you can adjust your diet to ensure that you are getting enough natural vitamin C. While you should always raise health concerns with your doctor or health professional directly, the following signs can accompany a vitamin C deficiency: bleeding gums and nose, poor healing of cuts, fatigue, and lowered immunity to infection. These symptoms do not necessarily indicate a vitamin C deficiency, but you can speak with your doctor if you are concerned.  A severe deficiency of vitamin C, in fact, can result in a disease called scurvy, which is caused when your body cannot produce collagen or absorb iron due to a vitamin C deficiency.  While fewer people in developed countries suffer from vitamin C deficiency to this extent, its onset can be very fast if vitamin C is not in the diet for about four weeks.  Those susceptible to scurvy include the elderly, illicit drug users, alcoholics, the mentally ill, dependents given inadequate care, those suffering from eating disorders such as anorexia or bulimia, smokers (smokers need more vitamin C to deal with the added stress on the body), and fussy eaters. Vitamin C does not stay in the body; it needs to be constantly replenished. A big meal of oranges today will boost today's vitamin C, but tomorrow you'll need more. It is thought that adults need a minimum of around 45 mg of vitamin C per day, with the optimal amount being around 90 mg for men, 75 mg for women and teen males, and 65 mg per day for teen girls. Additionally, pregnant and nursing mothers need 75g – 120 mg per day.  Whatever vitamin C you consume in excess of your daily allowance is usually excreted, and high doses of vitamin C are not considered to be toxic, but they do increase iron absorption which can be a problem for people suffering from hemachromatosis, an iron overload disease. Therefore, if you are already eating a balanced diet, it is unnecessary to take a vitamin C supplement. Also, too much vitamin C can cause abdominal pain, nausea, headaches, fatigue, kidney stones, and diarrhea.
اعرف ما هو فيتامين "سي". افهم العلاقة بين الطعام وما تتناوله من فيتامين سي. افهم العلاقة بين فيتامين "سي" والتوتر. لاحظ الأعراض المتوقعة لنقص فيتامين سي. اعرف أنه عليك تناول فيتامين سي يوميًا.