Nope: more like 12g or 15g.
Working: according to the nutrition facts (2.0 nutrition facts, 1.5 nutrition facts):
- Soylent 2.0 has 9g of sugars per 400-calorie serving
- Soylent 1.5 has 15g of sugars per 500-calorie serving, which would work out to 12g of sugars per 400-calorie serving
Obviously your daily sugar consumption would depend on how much Soylent you have, but even on 2.0, you’d have to limit yourself to 3 bottles (1200 calories) to even come close to 25g per day.
There’s a bunch of more detailed discussion of Soylent’s make-up buried in the FAQs section of the site, although they don’t seem to have an article specifically discussing sugars: https://faq.soylent.com/hc/en-us/sections/200307055-About-Soylent