Beets have become one of the most researched foods by modern nutritional science. Its characteristic reddish hue, a product of betalains, not only makes it visually appealing in salads and healthy smoothies, but also indicates the presence of bioactive compounds that have sparked the interest of researchers and health professionals. From ancient civilizations to contemporary elite athletes, beets have maintained a constant presence in the human diet. However, as with many foods considered "superfoods," beets present a duality that deserves careful exploration. While for millions of people they represent an invaluable source of nutrients and cardiovascular benefits, for other population groups they can become a food that should be consumed with caution or even avoided altogether. This ambivalence has generated confusion among consumers seeking to improve their health through diet, making a balanced analysis necessary to understand when beets are a nutritionally ally and when they may pose a risk.

The Bright Side: A Nutritional Treasure

Beets stand out for their exceptional nutritional profile. Rich in folate, manganese, potassium, iron, and vitamin C, this root vegetable offers a micronutrient density uncommon in root vegetables. But its true distinction lies in its high content of natural nitrates, compounds that the body converts into nitric oxide, a molecule that plays crucial roles in regulating blood pressure and improving blood flow.

Numerous studies have documented how regular consumption of beet juice can reduce systolic blood pressure in people with hypertension, making it a natural alternative for managing this condition.

Nitric oxide generated from nitrates helps to relax and dilate blood vessels, facilitating circulation and reducing the load on the heart.This vasodilatory property has led many athletes to incorporate beetroot juice before training or competitions, seeking to improve muscle oxygenation and physical performance. In addition to its cardiovascular benefits, beetroot provides betalains, pigments with antioxidant and anti-inflammatory properties that help combat cellular oxidative stress.Its dietary fiber content promotes digestive health and contributes to the regulation of blood glucose levels. Beetroot leaves, frequently discarded, are even richer in nutrients than the root, providing significant amounts of calcium, iron, and vitamins A and K. The Hidden Side: Contraindications and Precautions Despite its many virtues, beetroot is not a universal food. One of the main concerns revolves around its high oxalate content, natural compounds that can contribute to the formation of kidney stones, specifically calcium oxalate, the most common type. People with a history of kidney stones or a predisposition to developing them should limit or avoid beetroot consumption, as oxalates can crystallize in the urinary tract when present in high concentrations. The high nitrate content, so beneficial for most, can pose a problem in specific circumstances. Although the natural nitrates in vegetables have not been associated with the same risks as the nitrates added to processed meats, excessive consumption could have adverse effects on people taking vasodilators or medicinal nitrates for heart conditions. The combination could cause an excessive drop in blood pressure, with symptoms such as dizziness, weakness, or fainting. For people with diabetes, although beets contain beneficial fiber, they also have a moderate glycemic index due to their natural sugar content. Consuming large quantities or drinking pulp-free juice can cause blood glucose spikes that require monitoring. Those suffering from irritable bowel syndrome or digestive sensitivities should also proceed with caution, as the fructans present in beets can trigger symptoms such as bloating, gas, and abdominal discomfort. A benign but alarming phenomenon for those unfamiliar with it is beeturia, the reddish or pinkish discoloration of urine and, occasionally, stool after consuming beets. Although completely harmless, it can be confused with hematuria (blood in the urine) and generate unnecessary concern. This phenomenon affects approximately 10-14% of the population and is related to genetic factors and stomach acidity levels.

Finding the Balance

The key to reaping the benefits of beets while minimizing risks lies in mindful and personalized consumption. For the general population without specific medical conditions, incorporating beets into the diet in moderation is an excellent nutritional choice. A 100-150 gram serving two or three times a week provides benefits without exceeding safety limits for compounds like oxalates.

The method of preparation also influences its effects. Cooking slightly reduces the oxalate content and softens the fiber, making it more digestible. Combining beets with calcium-rich foods can help reduce oxalate absorption, as calcium binds to these compounds in the intestine, decreasing their availability for absorption and subsequent kidney stone formation.

For those with pre-existing medical conditions, consulting a healthcare professional is essential before making beets a regular part of their diet.

Nephrologists can advise patients with kidney disease on safe consumption limits, while cardiologists can assess potential interactions with cardiovascular medications. Endocrinologists, for their part, can help people with diabetes incorporate this food in a way that does not compromise glycemic control.

A Powerful Food That Requires Discernment

Beets perfectly exemplify how a food can simultaneously be a health ally and a risk factor, depending on the individual context.

Ultimately, beets remind us that optimal nutrition is not about following trends or indiscriminately incorporating foods labeled as “superfoods,” but about understanding our individual needs, respecting our body's signals, and making informed decisions based on scientific evidence and professional guidance. Only in this way can we transform food into true tools for health.

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