I saw some funny old ads from the 50s for toothpaste and mouthwash WITH CHLOROPHYLL! Same thing there, it had probably just entered shared knowledge, it sounde

I saw some funny old ads from the 50s for toothpaste and mouthwash WITH CHLOROPHYLL! Same thing there, it had probably just entered shared knowledge, it sounded sciency and natural at the same time, so why not add it to toothpaste? It must be good, right? Completely worthless, pure marketing gimmick, yet people bought it.