I believe the response from Soylent is that fiber itself is not necessary; it&#x27;s only needed to move along solid food through the digestive system.<p>If you&#x27;re only drinking Soylent, you should need far less fiber, if any at all.<p>I am seeing a lot of criticism of this online [1], however.<p>[1] <a href="http:&#x2F;&#x2F;discourse.soylent.me&#x2F;t&#x2F;reduced-fiber-in-1-5&#x2F;21706&#x2F;8" rel="nofollow">http:&#x2F;&#x2F;discourse.soylent.me&#x2F;t&#x2F;reduced-fiber-in-1-5&#x2F;21706&#x2F;8</a>