There is a wealth of health information available on the net. This is Dr Geoff Lambert's list of useful websites.
Health Direct A well organised multitude of health links. You will almost certainly find the health information you require using this site.
Healthy Eating for your Heart at the National Heart Foundation website
Go to Beyond Blue for information on depression.
Remember, all information found on the net is of a general nature and should never be used as a substitute for independent professional advice.