What all this hints at, in my opinion, are three options; more than one might apply:
- deeper underlying metabolic issues, probably due to gut microbiome, which leads to inhibited absorption of nutrients
- bad diet, causing lower nutrient intake
- higher usage and faster depletion of nutrients because of the body's response to chronic inflammation
After recently reading a lot about different correlations between metabolism, nutrition/diet and inflammation on the one hand and Androgenetic Alopecia on the other, I am quite sure by now that the combination of metabolic/dietary issues (pro-inflammatory factors) and a lack of anti-inflammatory factors (insufficient vitamin D, lack of certain anti-inflammatory diet components which our ancestors used to consume but we no longer do) play a very big role in how fast Androgenetic Alopecia progresses in individuals that are genetically prone.