Ranch has more salt than anything and more MSG than garlic, look at the ingredients on a pouch. Ingredients are listed by order of volume. It has more corn starch than onion. It has basically traces of anything else. I know this because I spent not a small amount of time replicating Ranch dressing.

Although there are a hundred MSG-conspiracy-nut websites that will tell you you don’t need MSG to make Ranch dressing, there is no Ranch dressing recipe that tastes anything at all like Ranch without MSG. Full stop.