You can find it all pretty easily by googling. Magnesium can give you wet stool and upset stomach, potassium can affect blood pressure and kill you, iron can put you into a coma – these are only some examples. This is serious stuff so I really recommend looking into it before trying any formulas out.
It’s not likely you’ll overdose with normal foods unless you eat very extremely (a lot of one food that is high in a certain nutrient etc), but with soylent you can easily miscalculate something and put yourself in danger. Double and triple check calculations. Do enough research to make certain you’re measuring stuff right and you know what’s safe and dangerous.