l carnitine tablet or liquid which is better

Both forms are effective, but neither is universally “better”—it depends on your goal and preference.

Liquid L-carnitine

Absorbed slightly faster because it’s already dissolved
May start working quicker (useful pre-workout)
Easier to take for people who dislike pills
Usually more expensive and has a shorter shelf life
Tablet/Capsule L-carnitine

Takes longer to absorb (needs to be digested first)
More convenient for daily use and travel
Longer shelf life and typically more cost-effective
Provides consistent, pre-measured dosing