Like some others, I found the concerns of measuring and mixing every vitamin and mineral to be a bit worrysome for trial purposes. So, I identified a multivitamin that contains reasonable amounts of most. The one I’m using is “multi-xtra” from a New Zealand based company.
But then I found the taste of liquid soylent (the macronutrients) to be unpleasant. Perhaps it’s my maltodextrin - it retains a trace of corn-like flavor, and I don’t really like corn.
So, I decided to try making a solid form that would resemble a granola bar or energy bar. To maltodextrin and whey powder, I added toasted oats and peanut butter (and of course, some water to make it mixable). I spread the mix out on a baking sheet and baked for 10 minutes. This probably breaks a bit of the maltodextrin into simpler sugars, but not much as it still doesn’t taste at all sweet. There may be some loss of protein quality as well, but the baking time could be shortened or eliminated all together if this were a concern.
The taste is more like what I was hoping for - bland, unremarkable. If you find drinking the liquid unpleasant and don’t mind adding a couple extra minutes work (you can make a couple sheets of this stuff at a time), might be worth a try!
FWIW, my intent here is to consume this stuff as a supplement for distance running training. I anticipate burning 4000+ calories a few days a week at the peak of training, and want a cheap no-hassle extension to whatever else I might be eating.