Anecdotal but I noticed that when I travel abroad for over a week I always lose some weight (enough to be considered weight loss and stay for a while). Even if

Anecdotal but I noticed that when I travel abroad for over a week I always lose some weight (enough to be considered weight loss and stay for a while). Even if I feel like I make unhealthier choices during my trip. Is it possible that a change of diet habits has the similar effects and essentially all we need is constantly changing routine?