Dark period prior harvesting

Hello, was reading alot and saw some growers recommend that the plants should get between 12-72 of complete dark(also not watering) just right before they are ready for harvest. My question is if someone know if its a science proved process or just a myth. and even if its not proved, based on your personal grows did it affect your plants somehow ? How many hours would you suggest if yes? Thanks in advance

Matt from the ytb chanel Mr. Canucks grow said in one of his vids that tgere has been an experiment made in the netherlands and the ones with a longer dark period before harvest had a higher thc level

I’d recommend 36-48 hours