Psyllium (Plantago ovata Forsk): From evidence of health benefits to its food application

•The consumption of psyllium reduces the levels of LDL cholesterol.•Psyllium contributes to the reduction of fasting and postprandial blood glucose concentrations.•Psyllium supplementation causes satiety, reduces hunger, and reduces the urge to eat.•Psyllium assists in weight loss.•Contemporary approaches on the use of psyllium in food products.