Scottsdale, Arizona - It sounds like a mixed message: Drinking alcohol may offer some health benefits, especially for your heart. On the other hand, too much alcohol may increase your risk of health problems and damage your heart.

When it comes to alcohol, the key is moderation. Certainly, you don't have to drink any alcohol, and if you currently don't drink, don't start drinking for the possible health benefits. In some cases, it's safest to avoid alcohol entirely - the possible benefits don't outweigh the risks.

Here's a closer look at the connection between alcohol and your health.

Possible health benefits of moderate alcohol use

Moderate alcohol consumption may provide some health benefits, such as:

• Reduce your risk of developing and dying from heart disease
• Possibly reduce your risk of ischemic stroke (when the arteries to your brain become narrowed or blocked, causing severely reduced blood flow)
• Possibly reduce your risk of diabetes

Even so, the evidence about the health benefits of alcohol isn't certain, and alcohol may not benefit everyone who drinks.

Guidelines for moderate alcohol use

Moderate alcohol use for healthy adults means up to one drink a day for women of all ages and men older than age 65, and up to two drinks a day for men age 65 and younger.

Examples of one drink include:

• Beer: 12 fluid ounces (355 milliliters)
• Wine: 5 fluid ounces (148 milliliters)
• Distilled spirits (80 proof): 1.5 fluid ounces (44 milliliters)

Moderate alcohol use may be of most benefit if you have existing risk factors for heart disease. However, you can take other steps to improve your heart health besides drinking — eating a healthy diet and exercising, for example, which have more robust research behind them.

Keep in mind that even moderate use isn't risk-free. For example, drinking and driving is never a good idea.

When to avoid alcohol use

In certain situations, the risks of alcohol may outweigh the possible health benefits. For example, talk to your doctor about alcohol use if:

• You're pregnant or trying to become pregnant
• You've been diagnosed with alcoholism or alcohol abuse, or you have a strong family history of alcoholism
• You have liver or pancreatic disease
• You have heart failure or you've been told you have a weak heart
• You take prescription or over-the-counter medications that can interact with alcohol
• You've had a hemorrhagic stroke (when a blood vessel in your brain leaks or ruptures)

The risks of heavy alcohol use

Heavy drinking is defined as more than three drinks on any day or more than seven drinks a week for women and for men older than age 65, and more than four drinks on any day or more than 14 drinks a week for men age 65 and younger.

Binge drinking is defined as four or more drinks within two hours for women and five or more drinks within two hours for men.

While moderate alcohol use may offer some health benefits, heavy drinking — including binge drinking — has no health benefits. Excessive drinking can increase your risk of serious health problems, including:

• Certain cancers, including breast cancer and cancers of the mouth, throat and esophagus
• Pancreatitis
• Sudden death if you already have cardiovascular disease
• Heart muscle damage (alcoholic cardiomyopathy) leading to heart failure
• Stroke
• High blood pressure
• Liver disease
• Suicide
• Accidental serious injury or death
• Brain damage and other problems in an unborn child
• Alcohol withdrawal syndrome

Drink alcohol only in moderation — or not at all

The latest dietary guidelines make it clear that no one should begin drinking or drink more frequently on the basis of potential health benefits. So don't feel pressured to drink alcohol. However, if you do drink alcohol and you're healthy, there's probably no need to stop as long as you drink responsibly and in moderation.