I’m not sure that works out to be cheaper, especially if you can get the soap in bulk (refill a bottle).

I am sensitive to the synthetic amalgam of proprietary chemicals known as ‘fragrance (parfum)’, and I have to evacuate the house or create major ventilation when anyone showers with a shampoo like Suave. I also then prefer not to go near their head for several hours.

It is odd how those shampoos work, fragrance wise. What I observe is a wave of odor that is emitted from the bathroom and slowly creeps through nearby rooms after the door is opened following showering.

Just cut the Bronners with water 1:1 or 1:3 and that liter of soap will last a looooong time.

Why 1:3 or 1:1, but not 1:2?

I mean.. there's no law against it! I meant to convey that their liquid soap is concentrated, and should be diluted (IMO) in some ratio before using.

1 part plus 2 parts is 3 parts, which would be odd

if you read ALL the text on the Dr Bronner's soap bottle, you'll know

I get the 1:1 part (all one) but 1:3? Is that the "moral ABC's"?