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Ascorbic acid efflux by embryos of dicot plants is a well-established mechanism of iron reduction and a step obligatory for iron uptake. [a] All plants synthesize ascorbic acid. Ascorbic acid functions as a cofactor for enzymes involved in photosynthesis, synthesis of plant hormones, as an antioxidant and regenerator of other antioxidants. [95]
Vitamin C megadosage is a term describing the consumption or injection of vitamin C (ascorbic acid) in doses well beyond the current United States Recommended Dietary Allowance of 90 milligrams per day, and often well beyond the tolerable upper intake level of 2,000 milligrams per day. [1]
Longer-term effects of COVID-19 have become a prevalent aspect of the disease itself. These symptoms can be referred to as many different names including post-COVID-19 syndrome, long COVID, and long haulers syndrome. An overall definition of post-COVID conditions (PCC) can be described as a range of symptoms that can last for weeks or months. [83]
Children and adolescents can also experience serious symptoms and long-term adverse health effects, including serious mental health impacts related to persistent COVID-19 symptoms. [31] The most common symptoms in children are persistent fever, sore throat , problems with sleep, headaches, shortness of breath, muscle weakness, fatigue, loss of ...
As the sodium salt of ascorbic acid, it is known as a mineral ascorbate. It has not been demonstrated to be more bioavailable than any other form of vitamin C supplement. [2] Sodium ascorbate normally provides 131 mg of sodium per 1,000 mg of ascorbic acid (1,000 mg of sodium ascorbate contains 889 mg of ascorbic acid and 111 mg of sodium).
The use of high-dosage intravenous ascorbic acid as a cancer treatment was first promoted by Linus Pauling and Ewan Cameron in the 1970s; [25] [26] however, these findings were not reproduced using oral administration by subsequent Mayo Clinic studies in the 1980s.
“Older adults with limited sun exposure, restricted diets, or darker skin tones often face a higher risk of deficiency, making targeted supplementation critical for their health,” she said.
Ascorbyl palmitate is an ester formed from ascorbic acid and palmitic acid creating a fat-soluble form of vitamin C. In addition to its use as a source of vitamin C, it is also used as an antioxidant food additive (E number E304).