Her remedy for beating jet lag?
According to the Sun, the no-frills boiled sweets help to kickstart the Queen’s metabolism when she arrives in a new time zone.
“Carrying out your daily habits like eating and sleeping in line with your new destination’s time zone — both en-route and on arrival — helps re-synchronise our body clock to our new environment,” general practitioner Dr Nick Knight told The Telegraph.
“What the Queen is doing by having barley sugar is essentially using her body’s sugar metabolic pathways to help adjust her body clock.
“Essentially the same should happen if you were to have your breakfast, lunch and dinner at times that match your destination before you get there, regardless of whether you’re hungry or not.”
This article originally appeared on Better Homes and Gardens.