Nutritionist Pablo Ojeda and Dermatologist Tristán Sobral Warn of Weight‑Loss Rebound and Runner‑Related Facial Aging

Nutritionist Pablo Ojeda explains that rapid weight‑loss diets often lead to a rebound effect, where lost weight is regained. He stresses that the problem is not a lack of discipline but underlying cravings, anxiety and brain‑circuit changes triggered by extreme dieting. Ojeda, who reduced his own weight from nearly 140 kg to a healthy level, advises a balanced approach that combines gradual diet changes with regular exercise and professional supervision.

Dermatologist Tristán Sobral notes that people who run frequently may develop a thinner, more aged‑looking face. The appearance results from loss of facial fat, reduced skin support, and increased exposure to sun and oxidative stress, which accelerates collagen and elastin degradation. Sobral clarifies that running itself does not age the skin; rather, the combination of fat loss and insufficient skin protection does. He recommends adequate sun protection and proper recovery to mitigate these effects.