This is one of the latest by Unwin. I think he is a great teacher and doctor.
https://www.youtube.com/watch?v=RUH7epLxkV8
Some great info on drug cost savings with low carb diet.
If a person wants a quick start guide to low carb diet go to minute 12 although the spoons of sugar equivalent just before that is great also.
Includes some covid comorbidity data.
John