Forgive me if I’m highly sceptical of your assertion that going for a walk after meals is an alternative to Metformin.

Obviously all processed carbs and red meat need to be cut out.

Vitamin B1 as thiamine is fairly important for glucose utilization. The benfotiamine form is additionally important.

There are just so many supplements for glucose regulation. I got my fasting glucose into the 80s by relying on psyllium husk and acacia fibers.

Ceylon cinnamon is good for post-meal glucose reduction.