Check out this huge anti Soylent rant on Reddit.
If you expose yourself to Soylent, you’re insulting your body with a witch’s brew containing a variety of nutrients, some of which impair each other’s absorption and some of which interact with one another to produce carcinogens. As an example of the problem, note that when zinc and iron are administered at the same time to subjects, the subjects absorb less iron.12 When zinc is administered 30 or 60 minutes before iron, the inhibitory effect is not seen. Thus the inhibory effect lasts less than 30 minutes, which should hardly represent a practical issue for normal people eating actual food, whereas people who seek to absorb all nutrients through a single food substitute like Soylent will encounter problems like these. My suggestion would therefore be to stay away from it.