I ate only soylent for a long time, and the lack of chewing did cause me some issues: first was bad oral hygiene. I brush and floss twice a day (after breakfast and before bed), yet I still got a cavity. Chewing normal food also cleans off plaques on your teeth, so when you’re not chewing anything those plaques just sit there fucking your shit up. Second (*and this is just my conjecture) chewing causes activity in a certain part of the brain to spike, so if you’re not chewing anything that part atrophies and causes depression. I forget where I read the chewing part though. So, along with the cavity, I also felt generally sad about everything. I would still definitely have it for lunch everyday because the nutrients are there, but yeah, unfortunately you have to chew stuff. I thought about just chewing gum, but those are all chock-full of microplastics so…