I actually haven’t had much a problem in that area. However I’m currently taking Vitamin A and Omega-3s in softgels (cod liver oil and fish oil), rather than combining them into the mixture, though I was doing that for a while.
I was researching emulsifiers, specifically lecithin, and well there was quite a bit more science there than I had time to go over. There are different ratings for emulsifiers that determine whether they will work in a solution of something for instance, or whether it’s the other way around and the something works in a solution of the emulsifier. It’s a bit tricky I haven’t looked into it much.
I did my own little experiment with a liquid lecithin I bought off the shelf at the supermarket and the amount of oil and water in my typical Soylent mixture - agitating it in my blender, and it went horribly. I either didn’t know what I was doing, expected it to do something it doesn’t, or it was the inappropriate product. Probably all three. From my little experiment I imagine its use is in homogenizing the oils, and not homogenizing the oils with the water (either that or I used the wrong product or made a mistake).
Also if you have the clever idea to add enough lecithin as an emulsifier to get the FDA’s daily value of choline, here’s some advice: do not! This is far too much and your stomach will roil like you’ll never believe and bathroom trips will be very unpleasant. Also liquid lecithin is probably one of the most difficult “liquids” I’ve ever cleaned, it’s like mayonnaise (which itself is a stable emulsion).