国外的报道：
There is no published data to support these claims. SOD is a labile enzyme that is rapidly degraded by gastric acids when ingested. It is essentially unabsorbed after oral administration even when enteric coated, and confers no pharmacologic activity when taken orally. While many foods (red meats, vegetables) are rich in SOD, their SOD is degraded when ingested and is rendered enzymatically inactive. The inactivity of oral SOD supplementation has been confirmed by at least one team that examined the effect of an oral SOD supplement on tissue SOD levels in mice. The animals received a diet containing 0.004% SOD, equivalent to 10 times the “recommended” intake for humans. No differences were found in the levels (activity) of two forms of SOD in tissue or blood between the control and treated groups. Additionally, the analysis of 12 brands of SOD tablets purchased from health food stores indicated that one product contained zero activity and ten contained less than 20% of the labeled activity claim.
因为人体消化酶中，不存在直接分解这类物质的酶。
与之有关的一般是蛋白酶和肽酶，而没有氨基酸酶。
这属于小分子物质，通过跨膜运输即可被小肠吸收。
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