Forms of Vitamin


One of the most important things is the form of Vitamins, I don’t see anybody paying attention to this, not even Rob.

For example you can read here, why is important to take the right form of a vitamin, not all the forms are equally good and some of them can be even harmful.

Common Synthetic Vitamins to Avoid and Other Toxic Ingredients to Avoid In Supplements

Some of the multivitamins that people is using for soylent contain vitamins mention above.

Synthetic vs Natural vitamins


Also it wouldn’t be a bad idea to think about to exceed a little (200%) the recomended ammounts for water soluble vitamins

I really think that @rob or somebody from his team should research a little bit more about this and come out with the best forms and combination (some forms can reduce the assimilation of others) of vitamins for Soylent. Now they have been funded they could hire a chemist or a nutritionist to do this.


Seems like from a brief reading on your links that the problem here is either that people have problems with the term synthetic, and wish to market their own (or affiliates) natural alternative, or that the bioavailability of some of the alternative forms of vitamins and minerals differ, but by no means being uneffective. The only important one to notice is vitamin E, as d-alpha tocopherol is what works, not l-alpha tocopherol, as far as I can understand.

The studies mentioning vitamin c only state that bioflavonoids may increase absorbtion, and that some forms of ascorbic acid might be less acidic and thus less absorbable, however also “safer” for some people with lower levels of stomach acid. The ones that do mention that ascorbic acid is only one part of the whole vitamin c (natural) also wishes to sell you stuff. Should be careful around those sources.

The articles also mention that taking to much vitamin supplements is a problem as some of the forms of the synthetic supplements are more bioavailable, and thus are easier to overdose on. As long as one have control over the amount, then I see no problem.

But the natural vs synthetic debate is important. Im not convinced of the “natural” superiority yet though :slight_smile:


There’s relevant info in some of those links, though there is some junk too. There’s no reason to strictly prefer synthetic forms over natural forms, but in many cases it does make a difference what form of a vitamin or mineral you take and some are preferable over others.

Certain synthetic forms are quite bad for you, such as vitamin k3 (which used to be used decades ago, but is no longer found in supplements). Poor absorption of synthetic vitamin e is also relevant, though since many soylent users are consuming olive oil, which is a good source of vitamin e, this is probably not a concern. Also, some mineral forms are poorly absorbed, such as certain oxides, like Magnesium and zinc oxide. For other minerals, it makes absolutely no difference, such as potassium and sodium, all forms of which are highly soluble and highly absorbable.

It’s something to read up on. I wrote a post on what I could find on the bioavailability of certain mineral forms here: It was hard to find good info on some minerals, unfortunately.