I've encountered a lot of people who eat a lot and then compensate by drinking a certain brand of juice with L-carnitine in it to make it up for the fats they've taken in. SUPER WRONG MOVE. Have you tried checking out the calories, especially the amount of sugar in it? Some products claim they've reduced the calorie amount but hey, CALORIES are still in there buddy so I guess you may want to burn those extra calories you've put in. I don't really want to burst anyone's bubble but if you want to LOSE WEIGHT, you must have 1000-4000mg of L-carnitine a day. If you check out the amount of L-carnitine in the products available today, they only have 50-300mg of the "natural miracle weightloss supplement". While it is true that you can burn fat just by having L-carnitine, the proper dosage and usage are needed. I've already mentioned the dosage needed. How about the usage? When you take in L-carnitine, you must exercise. L-carnitine's basic mode of action is to convert your fats into energy. So when you feel energized, you move more. That basic action is the KEY to the usual way of weightloss--TO MOVE AROUND. L-carnitine helps if you exercise and you BURN MORE than the usual process whenever L-carnitine's not around (good for weight plateau modes).
Honestly, the research regarding L-carnitine is still going on so all of the info you guys are reading are not yet 100% proven. If you really want to make use of L-carnitine, go get the capsule form not the one mixed with drinks/foods because you're just taking in additional calories. I tried the capsules form and it made me lose my weight faster when I went on a plateau mode.
BOTTOMLINE: L-carnitine is not like those other diet pills out there. IT won't make you palpitate, burn fat aggressively, and lessen your appetite. L-carnitine just converts fat into energy and this energy needs to be used up so you can burn more fat.