Longevity expert Diego Suarez has urged people to limit certain fruits in their diet, warning that bananas, mangoes, and grapes can cause sharp insulin spikes.
Speaking to Spanish news publication 20minutos, Suarez warned that several popular fruits contain surprisingly high sugar levels and glycemic loads that can harm overall health when consumed without restraint.
Bananas and insulin spikes
Suarez singled out bananas as particularly problematic, stating that the fruit consists of pure fructose. He noted that a single ripe banana contains as much sugar as a tablespoon of Nutella, the popular hazelnut cocoa spread.
Nutella is a hazelnut and cocoa spread produced by Italian confectionery company Ferrero, widely known for its high sugar density. Fructose is a simple monosaccharide natural sugar found in plants, which is processed primarily by the human liver.
Suarez advised individuals who suffer from abdominal bloating, excess weight, or persistent fatigue to remove bananas from their diet. He explained that eating ripe bananas causes a rapid surge in blood insulin levels, which can aggravate metabolic strain.
Insulin is an essential hormone produced by the pancreas to transport sugar from the blood into cells. Rapid surges in insulin levels can cause sudden drops in blood sugar, leaving individuals feeling tired and hungry shortly after eating.
Inflammation risks from mangoes
Suarez also warned consumers to exercise caution when adding mangoes to their regular diet. In his view, mangoes should only be eaten by people who live in tropical environments and participate in regular physical activity.
For individuals who lead a sedentary lifestyle, Suarez stated that the primary consequence of eating mangoes is an increase in inflammatory processes throughout the body.
Physical exertion helps body tissue absorb blood glucose more efficiently. Without regular exercise, consuming dense tropical sugars can exacerbate systemic inflammation, a long term stress response linked to metabolic disease.
Grapes compared to soda
Turning to grapes, Suarez recommended strict limitations on their consumption due to their immediate effect on metabolism. He explained that the glycemic load of grapes is so high that the body processes them in the same manner as sugary soda.
Suarez added that grapes fail to satisfy hunger, instead triggering cravings and addictive eating patterns in consumers.
Glycemic load evaluates both the quantity of carbohydrates in a food serving and how quickly it raises blood sugar. Foods with elevated glycemic loads can trigger rapid neurochemical reward loops in the brain, driving compulsive snacking without providing lasting satiety.
Migraine triggers and fruit tolerance
The warnings from Suarez follow previous advice from dietitian Dr Nicole Dandrea-Russert concerning poor individual tolerance to bananas.
Dandrea-Russert cautioned that bananas can provoke severe headaches in individuals who have a documented history of migraines.
Migraines are recurring neurological headaches characterized by intense throbbing pain and sensitivity to light or sound. Dietary triggers, including rapid blood sugar shifts and fruit compounds, are known to precipitate migraine episodes in sensitive patients.
