You’re very welcome. Most of those with type 2 diabetes are obese because of insulin resistance, but I have seen the occasional skinny person with type 2 diabetes. Is it possible he has type 1? Type 1 diabetes is where the pancreas produces no insulin (fat storing hormone) and type 2 is when there is too much insulin being produced, which leads to obesity.
Your dad is right on the money about exercise, and particularly walking. When I first started on my journey I tried to kill myself in the gym and actually gained weight. After I changed the way I ate, I lost my first 60 pounds while walking 3 miles a few times a week.

Absolutely! Sustainability is a must, so if you have a relatively healthy metabolism anything you can stick to is best. Before I wrecked my metabolism with all the processed carbs and sugar I used to get my “beach body” every year by replacing Coke with Diet Coke for a couple months haha.
The only disagreement I have with the doctor is for those with insulin resistance. Unless they cut out some of the carbs they will not lose weight because elevated insulin in the blood sends a fat storage signal to the body. It’s why type 2 diabetics gain more and more weight as the insulin they take (or the drugs that promote additional insulin creation) are increased.

Yeah, I tend to tune out once they try to sell a product. All of the obese people I worked with asked me if they needed to buy whatever “Keto” drink, pill or powder and I told them to save their money and just cut carbs. There’s a lot of hucksters out there running these scams and they make a bad name for it.
I agree that most Americans are eating crap compared to back in the day when they ate mostly home-cooked, whole foods. The sugary drinks are a huge change as well considering most use high fructose corn syrup (higher insulin response) rather than real sugar, which was bad enough.
One of the major changes that came about after WW2 is the whole low-fat theory to health and weight loss, which actually had the opposite effect. Of course, just like everything else, follow the money (the sugar industry helped fund this (see link). The food pyramid I grew up with in the 70’s and 80’s looks like something I would use to fatten my mini pig with, although it can be fine for people without metabolic syndrome. For obese people with insulin resistance, the “cut fat, eat 6 times a day, cut calories” advice for weight loss can lead to vicious binge cycles because of lack of satiety.
Great post!

https://www.npr.org/sections/thetwo-way/2016/09/13/493739074/50-years-ago-sugar-industry-quietly-paid-scientists-to-point-blame-at-fat