actually...the american heart association recommends that all adults keep their dietary intake of total cholesterol <300mg (not micrograms) per day. as we all know, cholesterol is found in any food derived from an animal (meat/fish, cheese, yogurt, eggs, etc.)
your genetic predisposition for hypercholesterolemia and your other dietary/exercise habits are also important factors in your question about your egg yolks.
an egg yolk actually has closer to 250mg of cholesterol...i would not receommend anyone eat an egg yolk per day. try egg beaters...they have egg beaters that are made out of egg whites only that are much better for you. all of the nutrition from an egg is found in the egg white anyway...the yolk is nothing but cholesterol. i.m sure you are eating other dietary sources of cholesterol.
the best "diet" is a healthy, balanced diet EVERY DAY and incorporation of physical activity.