For me, supermarket shopping is like navigating a processed-food obstacle course.

Eighty kinds of cereal on the left, Entenmann’s trap at right, dangerous potato chip display ahead!

Think about it: The average grocery store offered 800 choices more than half a century ago.

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Now shoppers have roughly 40,000 items to consider.

“Many are marketing ploys,” Rangan says.

“Even savvy customers have trouble translating them.”

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I’m definitely not savvy, so I asked Rangan to meet me at the market for a tutorial.

“It’s difficult to aim for 100-percent-perfect shopping,” she told me.

In only an hour, I learned to pack my cart eco-consciously.

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By opting for fresh items, “you’ll avoid most chemicals used in processing,” Rangan says.

Another reason to buy unadulterated edibles: Manufacturing and packaging burns up energy and generates pollution.

Be picky about produce.The organic label ensures your fruit and veggies haven’t been doused in industrial pesticides.

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Buy nonorganic thick-skinned produce, because you peel it anyway.

I happily exchanged my 89 cents-a-pound organic bananas for 59 cents-a-pound nonorganic bunch.

(For a list of what’s in season, visit FruitsAndVeggiesMoreMatters.org.)

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Rather than trust a local label, look for one that says exactly where the food is from.

Rangan points to the sticker on my clementines: South Africa.

She grabs Georgia oranges.

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“Not local exactly but closer, so these are a better option,” she says.

“Some preservatives can be highly chemical-based,” Rangan says.

Products baked on-site eliminate most of them, as well as the energy used for transport.

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Get certified-humane poultry and eggs.Rangan smiles when I show her my free-range, hormone-free eggs and chicken.

“And U.S. poultry isn’t allowed to have hormones.”

She suggests I buy organic, certified-humane eggs and poultry.

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Certified humane indicates that they had a higher quality of treatment.

To see which are healthy, print a Guide to Ocean Friendly Seafood from BlueOcean.org/seafood.

Opt for organic beef.Rangan nixes my store-wrapped meat because it doesn’t say how it was raised and produced.

My store doesn’t carry those options, so Rangan selects organic steak.

Photo Credit: Todd Plitt