Fasting might be a bit risky at advanced ages but reducing carbs (not only sugar) to the minimum for quite a while and then being very conscious about the intak

Fasting might be a bit risky at advanced ages but reducing carbs (not only sugar) to the minimum for quite a while and then being very conscious about the intake in the future is the key to success. Also you'll lose some weight which can be good if you're not that slim. Source: two family members on his 50s and 60s completely cured, one was about to use insulin and the other one was using it already for about a year.