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Artr (California) on 01/21/2026: 
https://pmc.ncbi.nlm.nih.gov/articles/PMC12772565/
Here are some relevant quotes from the study :
' Greater dietary thiamin intake demonstrated a statistically significant association with reduced incidence of ED. Our findings suggest that a lower intake of thiamin is an independent risk factor with ED. We can consider increasing the intake of thiamine in daily food. '
' We discovered associations between thiamin and several systemic diseases, all of which are also linked to ED. Therefore, we proceeded to further investigate whether variations in thiamin levels might trigger ED. We observed that an increase in thiamin intake levels did not show a significant trend of elevated testosterone levels. However, what we did find was that as thiamin intake levels increased, there was a reduction in the incidence of ED (table 2). Therefore, we proceeded to further stratify our analysis based on the severity of ED to examine the variations in the expression of these corresponding parameters. A key observation we made is that as the severity of ED increases, there is a corresponding decrease in the intake levels of thiamin. Furthermore, similar to the previous findings, as the severity of ED increases, there is a trend of decreasing levels of education and income, accompanied by a worsening of systemic metabolic disorders such as hypertension and diabetes (table 3). '
I found this third study quote to be very interesting as it suggests that low B1 levels is also associated with many other health issues suggesting that making sure you maintain healthful levels of B1 may go a long way toward fending off many health issues :
' We found that higher food thiamin intake was significantly associated with lower incidence of hypertension, diabetes, coronary heart disease, stroke and ED (all p trend 1.3 μg were 0.782 (0.651 to 0.940) (p<0.05). These findings suggest that dietary thiamin intake may play a protective role in the development of ED and other cardiometabolic disorders. Increasing thiamin consumption through dietary modification or supplementation could represent a potential strategy for ED prevention and management. '
To reach healthful levels of B1, the study suggests that even the lowest dose B1 supplements should be adequate to achieve the effects they saw in the study.
Art
