Low-dose aspirin can be started anytime, since 81mg aspirin tablets have only one side effect.

You’d be much better off changing your diet and lifestyle early in order to prevent Heart Disease rather than relying on medications to offset your bad eating habits and unhealthy lifestyle.

3 simple life decisions that will help you prevent heart disease:

1.       Never Start Smoking or Stop smoking now;  Never, ever restart.

2.       Stop drinking now. You can drink a little now and then, but don’t drink “frequently” any more.

3.       Your diet: the three diets (these are not diets to lose weight but diets to live on for your whole life) that have shown the most promise are the Ornish Diet (very low fat), the Mediterranean Diet (controlled fat, most of which is plant monounsaturated and fish), and the Portfolio Diet from the University of Toronto (includes “plant sterols” or oils from canola, olive, and almond), which are very good at preventing heart disease. Don’t think of this as being “on a diet” it’s a life long healthy eating plan

Having said this there is no harm in taking asprin even then.

Before you start taking any new medication you should really talk to your doctor.  He knows your health history and can give you the best advice.  Heredity plays a big role in some things than others with  Heart problems being number one.  

If you are smoking and drinking, taking aspirin isn’t going to help you until you clean up.  If your Diet is full of junk food and fat then Cholesterol could be a problem that you also need to consider taking action on.

Prevention is always better than cure, changing the way you think and eat is the only way to truly have the best chance at preventing heart disease.