I'm 62 and have been overweight all my adult life. When I was diagnosed back in May, I immediately started on a keto diet (<20g) and daily intermittent fasting - both of which I had tried before to lose weight, before falling off the wagon again...
Now I fast for a minimum of 16 hours every day, sometimes more; in practice this means omitting breakfast and having a late lunch. I eat from a menu that includes meat, fish, seafood, poultry, salad veggies, leafy greens, olives, avocado, full fat yoghurt, double cream, butter, eggs, cheeses, mushrooms, nuts and seeds. I completely avoid anything grain based, potatoes, rice and pasta. I also avoid milk and most processed food. But I do have a small amount of raspberries or blackberries now and then, a couple of squares of Lindt 85% or 90% and enjoy an occasional G&T. Importantly, my carb cravings have disappeared along with my joint pain and that alone is enough to keep me eating keto!
Mirroring what others above have said, we each have our own approach and own journey to make. This approach and journey is mine - that doesn't make it the one for everyone.
All the very best
~Heath