Age alone is a weaker reason than it is usually presented as: whole-blood NAD+ does not reliably fall with age, and the decline that does show up is tissue-specific and load-dependent
Probably thats why citric acid is usually not used as an exfoliant but more as a helper ingredient in small amounts to adjust the pH of a formulation
Recent findings by Ornelas et al
We use a natural glucose fermentation process
Int J Hyperthermia 20(2):224233 McGeer PL, Itagaki S, Boyes BE, McGeer EG (1988) Reactive microglia are positive for HLA-DR in the substantia nigra of Parkinsons and Alzheimers disease brains
Make sure to properly apply a broad-spectrum sunscreen with at least SPF 30, and protects against UVA, UVB, blue light, and infrared radiation. He also advises starting slow