On this show they do experiments, most are not formal scientific studies, involving food myths. They had 6 vegetarians and had 3 of them eat meat for 2 months. One person had an 18% improvement in fitness, the others had 2 or 3%. They said results inconclusive. Another one involved giving up caffeine.
The one I have a question about involves carbohydrates. They had 3 teams of sugarcane cutters in Jamaica, or some Caribbean island. Every 15 minutes thy stopped for a drink. Team one had water, team 2 had water with unflavored carbohydrate in it and team 3 had water with carbohydrate but were not allowed to swallow it. The result, the team who spit the water out won. The explanation is that there are receptors on the tongue that register carbs. After a while the body starts to react as if the carbs were consumed. Does this mean that they are burning stored fat? If this is so, could you lose more weight by chewing up a piece of bread and spitting it out?