(That’s an old wives' tale.)

But cooking in plastic containers could.

SELF quizzed experts for the latest on BPA and how to zap without risk.

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WHAT’S BEING DONEThe FDA is studying BPA but hasn’t yet recommended limiting its use.

Nuke and Nibble

Understand how your microwave works and you’ll reap the tasty benefits.

Here’s how to tweak your technique.

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To allow heat to distribute evenly, honor the standing time the package suggests.

KNOW WATT’S UPThe higher your microwave’s wattage, the stronger the waves and the faster meals cook.

But wattage can temporarily drop after repeated heating.

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In a busy break room?

Add more time in 30-second increments.

These dinners are portion control in a box!

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Some low-sodium entr?es have even less than 100 mg. Too bland?

Sprinkle a pinch of table salt.

You’ll still get less than if you had selected a full-sodium dish.

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Grab a side salad, broth-based soup or cup of yogurt to round out your meal.

Most women can safely eat about 40 g fat per day and still maintain their weight.

A flavorful find: Amy’s Enchilada Verde Whole Meal, with 13 g fat and 390 calories.

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One pick: Organic Bistro’s Wild Alaskan Salmon, which has a hearty 6 g fiber.