|>>|| No. 3484
There are a lot of problems with it.
There is one thing about this that would make it potentially dangerous for certain people. Your RDA of folate is being provided by soylent as 100% folic acid. In nature, you get very little folic acid, most is supplied directly as folate.
Your body has to convert folic acid into other forms of folate so that it can make use to it, a healthy human has only a limited capacity to make this conversion, and the chemical pathway it has to use is also needed for other important processes in your body. Folic acid simply isn't an ideal form of the nutrient, especially if you are not getting any at all in the natural form.
Secondly, your bodies ability to convert folic acid into folate declines significantly as you age, and about 5-10% of the population has a genetic defect which considerably lowers their capacity to make the conversion.
There are also some similar issues with other vitamins being in multiple forms, vitamin E for instance works best when present in a blend of all forms, Soylent just contains the alpha form. Another is Vitamin K which almost all supplements provide as K1, this is abundant in vegetables and is used by your liver to make blood clotting factors. But it is also important to have vitamin K2 which is essentially for your body to properly utilise calcium. (K2 is actually pretty scarce, the only reliable sources are eggs, meat and a weird Japanese food called natto. This explains the high rates of osteoporosis in vegans, the mainstream medical community has been trying in vain to blame vitamin D and calcium deficiency).
Another worry I have about this, is that a natural diet exposes you to a far far wider range of different chemicals than this meal replacement contains. There are thousands of chemicals you eat everyday, you wont die if you stop eating them, but they do have apparent health benefits. The problem with studying them is that the effects are minor but probably cumulative between all of them.Think of how many foods you see in headlines like "CHOCOLATE CURES CANCER".
There are so many different chemicals in so many different foods which may have benefits that scientists haven't really even began to properly understand them. If you want to be healthy rather than following a specific regime the only real answer is to regularly eat as wide a range of different foods as possible.
There are also issues with getting all your nutrients at the same time, certain vitamins and minerals aren't absorbed easily by your body when they're present in the same meal, for example calcium and iron aren't fully absorbed if you take them together. This is another reason why variety is important, you ideally need a lot of certain nutrients in one meal and a lot of others in a different one, rather than having your RDA divided up equally through the day.
I also have reservations about the balance of nutrients he's chosen:
More fibre is always better.
Some people are probably better off with more fat and less carbs.
There's too little saturated fat for my liking, saturated fat is quite metabolically important to your body, especially the brain.
I can't find detailed information on the oil composition, it looks like there are no medium-chain saturated fats, and no conjugated-linoleic-acid, which are both fairly good for your health.
It looks like there are no resistant starches, these are pretty important for maintaining the health of your gut bacteria.
I am actually thinking about trying this as a replacement for a normal breakfast, but I definitely wouldn't consider it to provide 100% of my diet.