Forget dumping your paycheck on anti-aging creams and injectables. The Fountain of Youth can be found in your kitchen.

In his new book, “The Age Fix: A Leading Plastic Surgeon Reveals How to Really Look 10 Years Younger” (Grand Central Life & Style, out now), Dr. Anthony Youn devotes an entire chapter to diet.

“The foods you choose can affect the development of wrinkles, skin-tightness and elasticity, and even how likely you are to get a sunburn,” Youn, who’s based in Michigan, tells The Post.

“Making changes in your diet can wipe years off your face,” says Youn.

It’s worked for Martha Stewart, still luminous at 74. “Everything we do affects how we age. And food is one of the most powerful — and fundamental ­— tools we have,” Stewart tells The Post.

Here, Youn shares 10 foods that will help you turn back the clock:

1. Eggs
An egg a day keeps the plastic surgeon away. “[They’re] packed with collagen-boosting protein and vitamin A to keep your skin tight and plump,” says Youn.

2. Quinoa
These edible seeds are “a dietary superstar,” says Youn. “[They’re] packed with zinc, a mineral that can improve skin’s rejuvenation rate and boost cell growth and repair.”

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3. Tomato paste
Want to make your whole-wheat pizza healthier? Top it off with more tomato paste. “[It’s] an easy way to get a good dose of lycopene, which has profound anti-inflammatory benefits, [and inflammation] contributes to skin aging,” Youn says. It can also help with sun protection. Studies have shown that eating five tablespoons of tomato paste every day can reduce the risk of sunburn, Youn says. When fresh tomatoes are in season, they’re also a great source of lycopene.

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