Carla walked into my office with despair in her eyes. I was surprised. Carla has been doing well in her four months out of prison; she got off drugs, regained custody of her kids, and even enrolled in a local community college.

Without much prodding she admitted to me that she had retuned to prostitution: "I am putting myself at risk for HIV to get my kids a f---ing happy meal."

Despite looking high and low for a job, Carla explained, she was still unemployed. Most entry-level jobs felt out of reach with her drug record, but what's worse, even the state wasn't willing to throw her a temporary life preserver.

You see, Carla is from one of the 32 states in the country that ban anyone convicted of a drug felony from collecting food stamps. With the release of the Global Burden of Disease Study last week, it bears looking at how we are perpetuating burdens among the most vulnerable Americans with our outdated laws.

If she'd committed rape or murder, Carla could have gotten assistance to feed herself and her children, but because the crime she committed was a drug felony, Carla joined the hundreds of thousands of drug felons who are not eligible.

The 1996 passage of the Welfare Reform Act was supposedly implemented to prevent drug addicts from selling their food stamps for drugs. But that concern is virtually unwarranted today. Unlike old food-stamp coupons, today's food stamps are distributed electronically, which makes selling or trading them quite difficult.

Nonetheless, the law persists. According to the U.S. Department of Agriculture, nine states have a lifetime ban for food-stamp eligibly for people convicted of drug felonies. Twenty-three states have a partial ban, such as permitting eligibility for persons convicted of drug possession but not sale, or for persons enrolled in drug treatment programs.

Denying food stamp benefits to people convicted of drug offenses is an excessive and ineffective crime control strategy. The policy increases an individual's risk of returning to prison by making it more difficult for people to survive after they get out, slowing or possibly even preventing their reintegration into society. People without the financial cushion necessary to get through the initial period of job searching and re-establishing a life have little choice but to turn to illegal means to make ends meet.

What's more, the food-stamp ban is a law that works against good public health policy. As a doctor who cares predominantly for people who are released from prison, I see the damaging consequences of this ban on food stamps. I have seen patients of mine with diabetes go without food and end up hospitalized with low blood sugar, and still others with HIV skip their antiretrovirals because they don't have food to take with their pills. Not having access to food is associated with bad health outcomes including worsening diabetes, HIV, depression. Young children face anemia, diabetes, and depression.

Women with children are especially affected. It's estimated that 70,000 women and their children are banned from obtaining food stamps. This means mothers who are simply trying to feed themselves and their children, and who are trying to get back on their feet after serving their time, are banned from receiving the money to pay for the basics necessary to survive. Meanwhile, 46 million others, including college graduates and PhDs with far more resources, can receive food aid.

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No other criminal conviction results in such a ban-not arson, not rape, not even murder.

Carla was arrested at 20 for selling marijuana. At the time, she had also been making money working for her "boyfriend" as a sex worker. Her boyfriend was also arrested for robbery. He could qualify for food stamps upon release. But not Carla. She continues to pay for selling marijuana- a drug which two states have now voted to legalize outright-and the price is health risks for herself and for her children.

It is time we end the food-stamp ban in all 32 states where this injustice persists and resurrect Representatives Rosa DeLauro and Barbara Lee's Food Assistance to Improve Reintegration bill. Punishing people by denying access to food is not only terrible policy; it threatens overall public health. It does nothing to fight addiction or drug use, nor does it end up saving taxpayers money.

And beyond all that, at just 23, Carla deserves a second chance, and her kids deserve a first.