How about building a proper website? First with a lot of nutritional information.
Then a person can join and create a profile. Example: age, gender, body type, goals etc.
Then you could cross reference this with other people and see how their recipe is working for them.
Have a symptoms checker too that looks at your profile and gives suggestions:
Q: “today I feel tired”
A: Take more of X or less of X
“Today I feel excellent and I think it’s because I put X, (or removed X) in my soylent.”
Also a section where people can talk about how Soylent is actually affecting them and what they’re doing to overcome bad effects or create better ones. And again, with cross referencing profiles, a person can look at a similar problem and maybe take the same action.
All the best,