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The upper limit for vitamin C intake is 2,000 milligrams per day for adults, as excessive intake can lead to gastrointestinal upset and other adverse effects

Normal overnight fasting blood glucose concentration is ~5 mmol/l, and can rise more than two-fold, postprandially

, Almeida A., Fernndez E., Medina J

As previously mentioned, SAM, a derivative of methionine, is an essential methyl donor that serves as a substrate for DNMTs (Bekdash 2023)

Data statistics are shown in Figure 5B

This pathway is intimately linked to the transmethylation pathway via homocysteine, which can be remethylated to generate methionine or be irreversibly converted to cysteine (Figure 1)