What do Steve Tyler, Tom Brady, and Dr. Phil have in common? Not much — except that they all appeared in “Got Milk?” ads, at the ages of 54, 25 and 54, respectively.

They might reconsider that today (their current ages are 71, 43 and 70), unless the ads said “Got 1% Milk?”

Researchers at Brigham Young University looked at 5,834 U.S. adults and found that for every 1% increase in the amount of milk fat people regularly consumed (say by drinking 2% instead of 1% milk, or 1% instead of skim), they increased their body's aging by four-plus years.

How did the researchers figure that? By looking at the participants' telomeres — the end caps on their chromosomes that erode with age, or from unhealthy habits.

The people who drank higher-fat milk had greatly shortened telomeres.

We've often cautioned that eating full-fat dairy products clogs your arteries and contributes to aging. This study, published in Oxidative Medicine and Cellular Longevity, is one more piece of solid evidence.

If skim is not your thing, tasty dairy alternatives include unsweetened almond, soy, oat, cashew, or rice milks.

And you can get the nutrients in dairy from other sources. For calcium, rely on tofu, collard, and turnip greens, kale, bok choy, and canned salmon with bones.

Potassium? Enjoy bananas, cantaloupe, broccoli, sweet potatoes, and mushrooms.

Get protein from legumes, whole grains, lean chicken, and fish like ocean trout.