I just got Soylent yesterday and wanted to share my experience so far.
Background: I’m very overweight, and also pretty lazy regarding going to the grocery. I get light breakfast and lunch during the work week, and make something at home for dinner. But on the weekend I will typically order in rather than going to the grocery. So I wanted to try Soylent as a healthier and very low-effort food for the weekend, and possibly dinner during the week. I also hope to use Soylent to better measure calorie intake.
Yesterday I had a normal light breakfast and lunch, got my Soylent package in the mail (Apparently V1.1) then whipped up 1/4 a bag poured over Ice for my dinner. Immediately I found the flavor chalky and unpleasant, but I think this is because the ice did not cool it sufficiently. I also found that drinking it did seem to mildly upset my stomach almost immediately and I had a couple quick trips to the bathroom. Later that evening after finishing my 1/4 pouch, I did find I was craving something solid so I had some meat and cheese.
I woke up this morning a bit out of sorts and with a headache. Basically I feel like I have a very mild hangover. I have read a number of threads on these forums, and headaches are usually attributed to lack of salt or too little water. But let’s be realistic here, I certainly got plenty of electrolytes from my other meals yesterday, and my 1/4 pouch was cut with roughly 1.5L of water. So those explanations are not really sufficient. This is not a case of getting a headache after an attempted 100% conversion, I’ve literally had a single meal of Soylent and am feeling bad effects. So the most reasonable explanation is that there’s an ingredient in Soylent that my body is reacting poorly to.
The only other thought is that I have a headache was because I under-ate. A 500 calorie dinner sounds perfectly reasonable to me, but at my height and weight the calorie calculator seem to think I should be taking in a ridiculous number of calories each day and i quite simply don’t believe it.
I believe my body will adjust to Soylent, and the negative effects will go away over time. But my main feedback at this point is that the salt/water explanation for headaches is likely bogus.