Love potatoes, especially oven baked. Too bad the second person you mentioned won't ever benefit from eating them.
And, don't get me started on Atkins!
I actually did Atkins about 6 (?) years ago. Weight, blood pressure, etc. was starting to get out of control. I was drinking 64-128 oz. of Coke a day (now I might have 3 20 oz. bottles a week (I know, it's bad for me, but it's a treat.). My students were calling me Drew Cary, my Uncle was calling me Butterball. So I did Atkins.
In the process of of loosing 40+ pounds (of which, about 15 has come back in the last 5 1/2 years), I did "improve" my blood work and blood pressure. BUT!
I was constipated, started getting chest pains
, had intestinal bleeding, and so on. I gave it up after about 5 months. I couldn't do it anymore.
So, the moral of the story? Eat lots of vegetables, fruits, grains, oats, and leave out the meats, the processed food stuffs, and the gallon of Coke a day.
So, yes, I did go down that road. But before it got to bad I turned back.