How do you know you can't live on just Soylent? Their CEO has been doing it for months.
That´s why "metabolic wards" were invented for: Clinical trials with diets are extremely difficult to control.
And that assumes that everyone is the same as this guy.
"You can finally join the easy, healthy, and affordable future of nutrition."
"What if you never had to worry about food again?"
"For anyone that struggles with allergies, heartburn, acid reflux or digestion, has trouble controlling weight or cholesterol, or simply doesn't have the means to eat well, soylent is for you." (this one is clearly making medical claims and I am amazed that Soylent avoided regulators)
"Soylent frees you from the time and money spent shopping, cooking and cleaning, puts you in excellent health,"
"there is much evidence that it is considerably healthier than a typical diet."
People can do what they like with their bodies but the Soylent founders were shady by making these nonsense claims during fundraising.
You claim that Soylent is a fun experiment. Soylent don't. Soylent claim that you can replace all your food with this forever.
When someone says "you can't live off Soylent" and someone replies that it's a fun experiment letting people know the lies and misrepresentations from the producers of Soylent is a valid response. Soylent is not being marketed as an experimental product woth some risk. Soylent is being marketed as a finished product that has health benefits.
But still I'd rather eat balanced diet than just Soylent or just protein shakes. Personal health is too important to turn myself in lab rat for Soylent CEO.