Apparently, I got the high/low backwards, but keep in mind the GI of a serving of Soylent is 60 for the powder, 49 for the drink. You can't just take the index of one ingredient alone and peg the whole product to that when the other ingredients influence absorption. Soylent's glycemic load over time is pretty modest.

https://faq.soylent.com/hc/en-us/articles/212769503-Glycemic...