> Metformin is generally safe, but common side effects do include vomiting, nausea, and diarrhea. Those experiencing these unpleasant side effects might consume less food, resulting in modest weight reductions.
Other foods remain delicious. For example, eggs and cheese and meat.
But basically, your interest in food will be drastically reduced, and you will eat just enough.
This is an important part of metformin's beneficial effect on lifespan and health.
I've never heard of this effect (let alone experienced it).
I do know that Diabetes itself can reduce the efficiency of taste receptors, and metformin will sometimes cause people to have a metallic taste in their mouth (due to metformin in produced saliva)
You say you've never heard of metformin affecting food palatability and taste? Did you search the web at all? Just use Google if you want anecdotal examples. For example:
https://forum.diabetes.org.uk/boards/threads/loss-of-appetit...
I joined as after 18 months on metformin, my appetite and enjoyment of food is constantly declining. I’ve lost about 10 kg over that time, which is not a problem. But I’ve lost my appetite and, as a keen cook and someone who has always enjoyed good food, I no longer look forward to meals and get little pleasure from food.
or
https://www.diabetes.co.uk/forum/threads/anyone-experience-l...
Metformin changed the taste of food slowly during the time I took it. It finally got to the point where all vegetables tasted like burnt plastic. This meant that I didn't want to eat them.
And so on. Now you've heard of it! All it took was a web search.