Since this is related to a 'sugar', I wondered if the (keto) diet could have an impact. The metabolic cycles of deoxyribose are mainly related to DNA metabolic

Since this is related to a 'sugar', I wondered if the (keto) diet could have an impact. The metabolic cycles of deoxyribose are mainly related to DNA metabolic pathways, which isn't really related that is the glucose/insulin metabolism. In particular, these DNA pathways are very reliant on nutrient and vitamins (folic acid, B6, B12, ...), , so that is the first thing to take into account in the diet. But further than that, there are other ways it can majorly impact DNA repair. For instance ATP production, and there is extensive research showing that cell inflammation is reduced by ketosis, and so by different mechanisms (reduction in oxidative stress, BHB metabolism, etc). Also note that in the other direction, the keto diet can promote hair loss in two ways. The first is short term, as the body takes one month to adjust from high-carb diet to low-carb, so it may cause a short nutrient deficiency. The second is long term, in the case of "dirty keto" diet. It is an approach where people only cares about getting the macro values right (that is a proportion of about 70% fat, 20% protein and 5% carbohydrates), and does not care about nutritional value. So industrial highly-processed food-stuff instead of veggies. This can cause serious nutrient deficiency that is really harmful.