Funding This research was supported by a grant from the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (grant number: HH21C0004), and a National Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (NRF-2020R1F1A1072720)
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That I have not talked about
Regulation of vitamin C transport
Many people do but if you have a digestive condition, low stomach acid or any gut absorption issue, very little of an oral supplement will actually be absorbed regardless of the dose
But, of course, on the list of complicated-sounding skincare ingredients, glutathione ranks high (say it with us: Gloo-tuh-thai-own!)