How's your appetite?

I'm 53M. Over the past 2 to 3 years my appetite has gotten so low that I've only been eating once a day at 6pm and even sometimes i skip a day.

And the meals I eat are usually under 1000 calories.

I've obviously lost weight but I'm not trying to it just happens when you don't eat.

Is this an aging thing? I live alone and my relatives are all gone. I know my parents appetite dwindled as they got older but they were in their 70s.

Just curious if others also go through this?