Health choices feel small because their consequences usually arrive as a collection.

Any single health choice is trivially small. One night, one meal, one skipped walk changes nothing measurable, which is exactly why the decisions feel weightless while you are making them. The consequences do not arrive individually, though. They arrive as an accumulation, all at once, and by then they cannot be traced to any particular day.

Judge these choices by their frequency rather than by their individual weight. Ask what happens if this becomes your normal. The pattern is the thing that will eventually present itself.