We’ve all had a craving for salty, savory, or sweet (hello, chocolate!). But sometimes that urge to satisfy our taste buds can seemingly only be filled by the strangest substances.

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Weird cravings can include paint, lemons, dirt, ice, chalk, clay, pebbles, sand, hair, metal — and even toilet paper, according to a recent report of a British mom who can’t use the bathroom without noshing on this non-nutritive household item.

What’s going on here? Let’s take a closer look at why we crave — both the normal stuff andthe strange stuff.

Cravings, explained

If you’ve ever wondered why you simply can’t move on until you’ve had a slice of pizza or a piece of German chocolate cake, you’re not alone: Scientists have been trying to figure out the mystery of cravings for some time.


(Photo: Getty Images)

Pica cravings might be the result of that mineral deficiency, but like most eating disorders, many cases may result from the interplay of multiple issues — hormonal, behavioral, environmental, and so forth. “Biochemicals, stress, sleep, hormonal changes and exercise are all factors,” says London.

Experts aren’t entirely sure how many people currently live with pica, since estimates are based on only those who have sought treatment. “Doctors can only assess those who have developed stomach or other complications due to the volume of the non-food items they have eaten,” says Setnick, who has seen people with pica cravings ranging from packets of artificial sweetener, to cardboard and flour.

Hunnes says some estimates of pica sufferers suggest up to 50 percent of those with iron-deficiency anemia may have some kind of pica craving. And since, according to the World Health Organization, 30 percent of people worldwide are thought to have an iron deficiency, non-nutritive cravings could be more common than realized.

So, why do we think they’re “weird” if they’re so common? Like any eating disorder, people would rather not talk about it. “It’s the social and psychological stigma of consuming these non-food substances,” says Hunnes. “It is nearly impossible to accurately assess how many individuals have pica. Researchers estimate prevalence to be anywhere from 8 percent to 65 percent of individuals who have iron-deficiency anemia.” So, that could be a lot of weird cravings.

Those with pica sometimes have even greater mineral deficiencies as the condition progresses and cravings interfere with normal healthy eating. The disorder also puts people at risk for infections from excessive bacteria on non-food items, toxins within non-food items, and issues like constipation if items cannot be digested (think metal objects such as pennies, for instance).

Since pica can lead to a host of complications, it’s important to speak up if you (or your child, or someone close to you) experiences bizarre cravings.

When you should see a doc

Talk to your doc about pica if you have a persistent craving for anything that falls in the non-nutritive spectrum — ice, dirt, chalk, paint, toilet paper, you name it. Trust your gut (literally) if your urge feels off.

Not only could the substance be harmful to your health — ingesting metal might cause an intestinal blockage, or paint may give way to lead poisoning in children — but it may be the sign of an underlying condition.

“There is likely a physiological or psychological explanation for the consumption of these items that should be treated,” says Hunnes. “It might be iron-deficiency anemia, or other neurological or hormonal conditions.”

According to London, a doctor will do a full medical evaluation to assess for nutrient deficiencies, as well as the potential harm non-food substances may have caused in the body — especially if they’re known to contain toxins.

Thankfully, many times, docs can identify the source of the issue — and it’s oftentimes that key mineral we’ve been talking about. “Worth noting, most of these non-food cravings appear to resolve, or at least significantly decrease, with the normalization of iron levels,” Hunnes says. Other signs of iron-deficiency anemia are fatigue, lightheadedness, weakness and shortness of breath, so talk to your doc about any other symptoms you have in addition to the craving.

In some cases, pica needs to be treated with therapy. After a physician checks for deficiencies, docs tend to use a multi-faceted approach including developmental, behavioral, and environmental therapy.

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“A psychiatrist will evaluate if there is a background issue of anxiety, depression, or obsessive-compulsive disorder, and a dietitian can ensure that the individual knows what to eat for good nutrition and to strategize alternatives of what to eat when the cravings hit,” says Setnick. “A counselor can also address the behavioral aspects, and help the individual identify and manage any external elements that trigger the cravings, such as stress or emotions.”

Ultimately, the prognosis depends on the case. Pica may stop spontaneously in children and pregnant women (blame those hormones), but it can go on for years, especially in people with mental and developmental disabilities, unless treatment is sought.

“A number of cravings are simply built into our DNA, and are the reason why some people crave sugar over salt and vice versa,” says London. “But if you find yourself becoming obsessively compulsive about anything for an extended period of time, you should see a specialist about it.”