many published studies involve laboratory models or animals rather than humans
For this reason, ascorbic acid must be always used in the presence of sulfur dioxide to prevent wine oxidation (Barril et al
And medical science approves the use
Brewed teas may also contain significant amounts of heavy metal contamination (Schwalfenberg et al , 2013), this may account for some of the effects noted in the above stated studies

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doi: 10.1007/s11064-006-9144-5 156 MoserH