Results 251 to 260 of 360
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June 4th, 2020 10:01 AM #251
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June 5th, 2020 05:58 PM #252
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July 20th, 2020 02:23 PM #253
I've been taking Bio C from Unicity for several years now. I just read the label and it contains only 60 mg of Vit C!!! Is that enough? Don't we need 500 mg? I like this because it does not make me acidic e kasi pala ang baba ng dosage It's around P1000 for 300 tabs (P3 per tab)
Fern C 500 mg is okay din, I don't get acidic pero ang mahal!!! Parang almost P10 tab
Inisip ko rin Ester C from Solgar but it's about the same price as Fern C
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July 20th, 2020 04:12 PM #255Go for vit c 1000mg with time release...
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July 20th, 2020 04:27 PM #256
1000mg is abit much according to NIH for some groups...
Health Risks from Excessive Vitamin C
Vitamin C has low toxicity and is not believed to cause serious adverse effects at high intakes [8]. The most common complaints are diarrhea, nausea, abdominal cramps, and other gastrointestinal disturbances due to the osmotic effect of unabsorbed vitamin C in the gastrointestinal tract [4,8].
In postmenopausal women with diabetes who participated in the Iowa Women’s Health Study, supplemental (but not dietary) vitamin C intake (at least 300 mg/day) was significantly associated with an increased risk of cardiovascular disease mortality [61]. The mechanism for this effect, if real, is not clear and this finding is from a subgroup of patients in an epidemiological study. No such association has been observed in any other epidemiological study, so the significance of this finding is uncertain. High vitamin C intakes also have the potential to increase urinary oxalate and uric acid excretion, which could contribute to the formation of kidney stones, especially in individuals with renal disorders [8]. However, studies evaluating the effects on urinary oxalate excretion of vitamin C intakes ranging from 30 mg to 10 g/day have had conflicting results, so it is not clear whether vitamin C actually plays a role in the development of kidney stones [8,87-89]. The best evidence that vitamin C contributes to kidney stone formation is in patients with pre-existing hyperoxaluria [25].
Due to the enhancement of nonheme iron absorption by vitamin C, a theoretical concern is that high vitamin C intakes might cause excess iron absorption. In healthy individuals, this does not appear to be a concern [8]. However, in individuals with hereditary hemochromatosis, chronic consumption of high doses of vitamin C could exacerbate iron overload and result in tissue damage [4,8].
Under certain conditions, vitamin C can act as a pro-oxidant, potentially contributing to oxidative damage [8]. A few studies in vitro have suggested that by acting as a pro-oxidant, supplemental oral vitamin C could cause chromosomal and/or DNA damage and possibly contribute to the development of cancer [8,90,91]. However, other studies have not shown increased oxidative damage or increased cancer risk with high intakes of vitamin C [8,92].
Other reported effects of high intakes of vitamin C include reduced vitamin B12 and copper levels, accelerated metabolism or excretion of ascorbic acid, erosion of dental enamel, and allergic responses [8]. However, at least some of these conclusions were a consequence of assay artifact, and additional studies have not confirmed these observations [8].
The FNB has established ULs for vitamin C that apply to both food and supplement intakes (Table 3) [8]. Long-term intakes of vitamin C above the UL may increase the risk of adverse health effects. The ULs do not apply to individuals receiving vitamin C for medical treatment, but such individuals should be under the care of a physician [8].
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July 20th, 2020 04:53 PM #257
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July 20th, 2020 05:31 PM #259
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July 20th, 2020 05:34 PM #260
the triumph of man over... man!, using the crudest of implements (by modern standards).
Traffic!