Does tolerance wane over time?

When I was in my early 20s (now 33) my tolerance was much higher. Also given that’s when my depression was at its peak. I remember being able to do 9 shots of crown straight (not much compared to others I know) and passed out after eh 19 shits of rum/vodka abroad. But now I get tipsy even after one cocktail. I stopped drinking consistently compared to before. How do you build it back up? Just keep practicing? Or does your body just give out at this age and beyond?