Vitamin C

https://lpi.oregonstate.edu/mic/vitamins/vitamin-C

Vitamin C and Immune Function

https://pmc.ncbi.nlm.nih.gov/articles/PMC5707683/

Vitamin C: One compound, several uses. Advances for delivery, efficiency and stability

https://www.sciencedirect.com/science/article/pii/S1549963419302011

Vitamin C Promotes Epidermal Proliferation by Promoting DNA Demethylation of Proliferation-Related Genes in Human Epidermal Equivalents

https://www.sciencedirect.com/science/article/pii/S0022202X25004166

Link between aldehydes and premature aging revealed

https://www.news-medical.net/news/20240412/Link-between-aldehydes-and-premature-aging-revealed.aspx

Formaldehyde and De/Methylation in Age-Related Cognitive Impairment

https://pmc.ncbi.nlm.nih.gov/articles/PMC8231798/

Study reveals how formaldehyde alters gene expression through epigenetics

https://www.news-medical.net/news/20231102/Study-reveals-how-formaldehyde-alters-gene-expression-through-epigenetics.aspx

As an overview of the research, Dr. Esteller points out that "we have discovered that formaldehyde is an inhibitor of the MAT1A protein, which is the main producer of S-Adenosyl-L-Methionine (SAM) and this last molecule is the universal donor of the chemical group "methyl" that regulates epigenetic activity. Specifically, we found that exposure to formaldehyde induced a reduction in SAM content and caused the loss of methylation of histones, proteins that package our DNA and control the function of thousands of genes".

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The ascorbate biosynthesis pathway in plants is known, but there is a way to go with understanding control and functions

https://pmc.ncbi.nlm.nih.gov/articles/PMC11066809/