I know nothing about what Grillak is mentioning but it doesn't appear he's making it up.
https://www.sciencedaily.com/releases/2018/06/180629114711.htm
https://www.nature.com/articles/494009d
https://www.sciencedaily.com/releases/2018/06/180629114711.htm
https://www.nature.com/articles/494009d
Gender Affirming Hormone Therapy induces specific DNA methylation changes in blood
DNA methylation is an epigenetic mark that is influenced by underlying genetic profile, environment, and aging. It also plays a key role in female-specific X-chromosome silencing in mammals. In addition to X-linked DNA methylation, sex-specific methylation patterns are widespread across...
www.medrxiv.org