Is it healthy to only eat once a day if I also?

Take 1Tbs of L-Carnitine liquid (a href="http://www.lifesource4life.com/L-carnitine-liquid.htm)" rel="nofollow"http://www.lifesource4life.com/L-carniti…/a in the morning? If you go to that website, it shows that L-Carnitine boosts metabolism and it's also an appetite suppressant. I've been eating only 1 meal, a salad or some sort of stir fry, at around 3pm for a week and I don't feel any different except that I get shaky sometimes (but I'm hypoglycemic so that happens occasionally anyway). But I'm wondering if this is healthy or not...