Temperance means to avoid substances that can harm us. It also means to use even good substances in moderation.
Avoid - Alcohol and tobacco consumption, even in small amounts. These are known to increase the risk of multiple types of cancers and other illnesses. These products should always be avoided.
Moderation - Overeating sets your body chemistry into red alert with high blood sugars producing increased insulin which leads to low blood sugar. The immune system requires a steady blood sugar to work efficiently. Overeating reduces the immune systems ability to fight infection.
Avoid alcohol, tobacco, and drugs.
Eat healthy foods in moderation.