Smelly sweat

I have been teaching Bikram yoga for the last 3 years. Three students recently commented to the studio owner that their sweat smelled like ammonia. One of them is a nurse so her thoughts automatically went to ketosis (when the body breaks down fat to make glucose for energy) as being the culprit. While I agree that that MAY be the case, when I started practicing, my sweat smelled profusely of acetone & ammonia, as did my bathroom and my laundry room where my wet clothes and towels would hang to dry. For no particular reason, after teacher training, I stopped drinking diet sodas and eating things that contained aspartame or other artificial sweeteners. Within a week, I noticed the smell disappear from my sweat and it only comes back when I occasionally indulge in that Diet Coke fix. I think my suggestion for these students would be to evaluate their diet first. If they are getting an appropriate number of calories, and protein, fat, and carbs in appropriate ammounts, then I would advise them to look at the “other” things in their diet, like artificial sweeteners, fried foods, etc. and eliminate those to see if the smell goes away. The question that I am putting out there is what do you think? Does what you eat and drink make your sweat smell differently? Mine sure does. How likely do you think this is a ketosis issue versus a sweating out the yucky things we eat issue?