A Nutritional Void
Raw cornstarch is a refined carbohydrate derived from the endosperm of corn kernels. This highly processed substance lacks the essential nutrients found in whole grains, such as fiber, protein, vitamins, and minerals. A single tablespoon contains approximately 30 calories, but these are primarily empty calories from carbs with no nutritional substance to support a balanced diet. The body requires a broad spectrum of nutrients for proper functioning, and relying on or habitually consuming raw cornstarch can lead to nutritional deficiencies over time.
The Impact on Blood Sugar
One of the most immediate effects of consuming raw cornstarch is its impact on blood sugar levels. Because it lacks fiber, it has a high glycemic index, meaning it is digested very quickly and can cause a rapid spike in blood glucose. This can be particularly dangerous for individuals with diabetes or insulin resistance, who need to carefully manage their blood sugar. Over time, a diet high in refined carbs with a high glycemic index may also be linked to an increased risk of conditions like heart disease. In controlled medical settings, uncooked cornstarch is used to help manage hypoglycemia in specific conditions, but this is a medically supervised application and not for general dietary practice.
Digestive System Strain and Discomfort
Consuming raw, unheated starch is not an easy task for the digestive system. Unlike when it is cooked, raw cornstarch is difficult to break down, which can lead to a host of uncomfortable gastrointestinal problems. The digestive tract is not designed to process large quantities of uncooked starch, causing it to ferment in the gut and trigger significant discomfort.
Common digestive issues from eating raw cornstarch include:
- Bloating: The fermentation process creates gas, leading to a distended and uncomfortable stomach.
- Gas: Excess gas production is a direct result of the bacteria in the gut fermenting the undigested starch.
- Constipation: The lack of fiber combined with the heavy, binding nature of raw starch can lead to severe constipation.
- Intestinal Issues: Chronic consumption can lead to more serious, long-term intestinal damage and blockages.
Comparison: Raw vs. Cooked Cornstarch
To highlight why raw is an issue, consider the stark difference between raw and cooked cornstarch.
| Feature | Raw Cornstarch | Cooked Cornstarch |
|---|---|---|
| Nutritional Value | Almost none, considered empty calories. | Almost none, negligible amount used for thickening. |
| Digestibility | Difficult to digest, can cause bloating and gas. | Broken down by heat, making it easier for the body to process. |
| Digestive Impact | Can cause constipation and intestinal problems. | Does not typically cause digestive issues in small, cooked amounts. |
| Glycemic Index | High, causes rapid blood sugar spikes. | High, but used in small amounts so the impact is minimal. |
| Safety | May harbor harmful bacteria; not intended for consumption. | Safe when cooked, as heat kills potential bacteria. |
| Intended Use | Not intended for consumption. | Used as a thickening agent in sauces, soups, and baked goods. |
Cravings and the Link to Pica
A persistent and intense craving to eat non-food substances like raw cornstarch is a symptom of an eating disorder called pica. The word 'pica' comes from the Latin word for magpie, a bird known for its wide-ranging appetite. Pica is most commonly associated with iron-deficiency anemia, but it can also be linked to zinc deficiencies, psychological issues, and hormonal changes, particularly during pregnancy. If you experience a regular craving for raw cornstarch, it is crucial to consult a healthcare professional. Simply consuming the starch won't fix the underlying deficiency; a doctor can conduct blood tests and recommend the appropriate treatment, such as iron supplements.
Potential Negative Impact on Iron Absorption
Ironically, for those with iron-deficiency anemia, consuming large amounts of starch may actually inhibit the body's ability to absorb iron from other foods. This creates a negative feedback loop where the craving is driven by a deficiency that the very act of fulfilling the craving can worsen. This highlights the importance of addressing the root cause with medical guidance rather than self-medicating with potentially harmful substances.
Safety and Alternatives
Beyond the physiological effects, consuming raw cornstarch also carries a risk of bacterial contamination. While the risk may be low, uncooked flour and similar powders can carry harmful bacteria. Cooking cornstarch effectively eliminates this risk, which is why it is meant for culinary use as a thickening agent, not as a standalone snack. For those with texture-based cravings associated with pica, healthier alternatives include chewing ice or incorporating nutrient-dense foods into your diet. A balanced diet rich in iron-filled foods like lean meats, beans, and leafy greens can help address underlying deficiencies. It is always best to find healthier coping mechanisms for cravings and seek medical advice for any persistent non-food cravings.
Conclusion
What does raw cornstarch do to the body? In short, it provides no meaningful nutrition and can lead to significant health issues. The habit of consuming raw cornstarch can cause immediate digestive discomfort, disrupt blood sugar levels, and is often a sign of an underlying medical or psychological condition like pica. If you experience such cravings, the safest and most effective course of action is to seek a medical evaluation to identify and treat the root cause, rather than continuing a potentially harmful practice. For culinary purposes, cornstarch is a valuable thickening agent when cooked and used in moderation. It is crucial to remember that it is a processed ingredient, and for health and well-being, the vast majority of our nutrition should come from whole, nutrient-dense foods. Learn more about healthy nutritional practices at the National Institutes of Health website.
