Carvajal's gluten-free diet: Modern wheat under suspicion

Carvajal, gluten, and injuries: The business of the wheat-free diet

Carvajal played only 12 matches in 2021, a season where injuries repeatedly sidelined him. Later, the Real Madrid fullback attributed his physical resilience to a single decision: eliminating gluten. He shared this on Universo Valdano, Movistar+'s program, stating what has become an elite athlete mantra: "I am not intolerant, but it caused me inflammation."

His reasoning is simple: since removing it, he claims to have suffered only a ten-day soleus issue after the World Cup. This trend isn't new—more non-celiac athletes are ditching gluten and reporting benefits—but backing from a Real Madrid player boosts its visibility. It opens two unrelated fronts: whether modern gluten is worse than traditional varieties, and if paying more for gluten-free products makes sense.

What Carvajal says about gluten and injuries

The player's argument mixes two things the label "celiac" doesn't cover. He admits he isn't intolerant, highlighting the recurring contradiction: without a diagnosis, what is this perceived inflammation? Some argue celiac disease is just the clinical tip of the iceberg, with a spectrum of undiagnosed sensitivities causing bloating, heavy digestion, and vague discomfort. Counterarguments note that subjective feelings aren't proof; those who improved by cutting bread might have benefited from also dropping industrial pastries, sugar, and ultra-processed foods.

Celiac disease affects roughly around 1% of the population. That percentage doesn't explain why half the supermarket shelves are now stocked with gluten-free options. What explains it is perception, justified or not, that wheat causes issues. There is no medical consensus that sways customers once they've decided.

Is current wheat worse than centuries ago?

Here the analysis gets interesting. One school of thought argues modern cereals differ from traditional ones: during the 20th century, varieties resistant to pesticides were selected, antiestéticaturing large, sticky gluten molecules favored by bakeries but potentially potent allergens. The most aggressive version of this thesis cites genetic modifications in the 1950s and a Frankenstein gluten less than a century old. Lacking firm evidence, it still circulates widely.

The counterargument relies on historical common sense. Wheat has fed entire civilizations for millennia and provides significant protein—about 9 grams per 100g. If it were junk food, empires wouldn't have been built on it. Nuances exist in processing: traditional bread was crumbly, slow-fermented, and unlike today's airy buns that barely break apart.

Eating gluten-free costs more

This enters the shopping basket, where the issue stops being physiological. Products labeled gluten-free are, according to circulating estimates, 30% more expensive than their wheat-based equivalents. The irony is that naturally gluten-free foods—meat, fish, eggs, vegetables, legumes, cheese, fruit—are among the cheapest. The costly items are substitutes: muffins, pizza, and macaroni versions. Avoiding gluten is only a luxury if one insists on eating the same processed foods with a different label.

The phenomenon even has geography. Mercadona pioneered filling shelves with gluten-free products, and some municipalities have declared themselves gluten-free zones, serving as commercial hooks. Behind this lies an expanding business: when a trend coincides with real medical need, industry doesn't distinguish between patients and those joining for preference.

Does quitting gluten cause long-term intolerance?

This is the most repeated antiestéticar and least proven hypothesis. The theory suggests the body, becoming unaccustomed, develops intolerance to something it previously digested well: an involuntary own goal. A similar dynamic exists with lactose, where data cited in debates indicates digestion capacity varies between 30% and 50% of the population depending on the region of Spain, with issues appearing even without ever stopping milk consumption. Intolerance would be inherent, not due to disuse.

Those who have avoided gluten for years cite personal experience. Some report days-long burning sensations, balloon-like bloating, and back pain that vanished upon cutting bread. Others haven't eaten a sandwich in three decades, claiming perfectly healthy lives without substitutes. Anecdotes aren't clinical trials, but they aren't nothing either.

With these elements, the honest answer remains inconclusive. No one has proven modern gluten poisons those who tolerate it, nor that removing it cures muscle injuries. And no one fully explains why many believe wheat harms them when millennia of humans digested it without complaint. The matter isn't closed: it's postponed until the next injury.