I have not been using official soylent or diy soylent but have been victim of inferior quality supplement. I am diagnosed with low magnesium stored in body. This is causing me fatigue and weakness. Condition was developing for over 9 months in time when I saw my weakness and fatigue increasing slowly after long walks. Nobody, including my doc, could figure out reason. But problem was this - I was using vitaminshoppe cal-mag pills for 500 mg of calcium and 250 mg of magnesium in one pill. It turns out these pills have terrible absorption. They were just being flushed out. Before this, I was taking solaray chelated cal-mag which is 2 pills for same amount of elements and multiple salts of same element for better absorption. That time I was totally fine.
Now I am taking cal-mag again from solaray and getting better.
So, if you are putting supplements in soylent (which everyone is…obviously), make sure it’s good quality supplement so that it absorbs better. Just saying…