Do you need NAD?

https://www.elysiumhealth.com/en-us/basis

Tru-Niagen

https://blogs.scientificamerican.com/guest-blog/thinning-the-fog-around-sirtuins/

https://www.scientificamerican.com/article/aging-is-reversible-at-least-in-human-cells-and-live-mice/?fbclid=IwAR3kLD7vpveTq_7FrF7tPDAdOgERiJdbLXyF5pVw0BnT1WEN1hfKKKl-ORY

https://www.sciencedirect.com/science/article/pii/S0092867416305943#fig4


https://bio.libretexts.org/Bookshelves/Biochemistry/Book%3A_Biochemistry_Online_(Jakubowski)/08%3A_OXIDATION%2F%2FPHOSPHORYLATION/8B%3A_Oxidative_Enzymes/B02.__The_Chemistry_of_NAD__and_FAD

https://pubmed.ncbi.nlm.nih.gov/3809170-riboflavin-metabolism-in-the-hypothyroid-human-adult/