Trish, both of these men who dropped dead were only walking and died from a medical condition. It just so happened that they were walking when it happened. It probably would have happened anyway. I don't think the walking caused it. Everyone should check with your doctor before starting an exercise plan. When asked if I could walk on my treadmill my doctor said I could walk 50 miles if I want to, even with heart issues. I'm not going to do that! LOL
I will pray for healing for your nephew. He is young.
There really is such a thing as keto or low carb rash. That's probably what you have. But you can eat reduced carb.
We did not do well at the casino.

Can't win all the time.