Name a substance the human body produces
Lubricin
Lubricin is a glycoprotein secreted in the synovial joint that lubricates cartilage surfaces and reduces friction.
Sources:doi.orgen.wikipedia.org
(10Z)-heptadecenoic acid
The HMDB lists 10Z-heptadecenoic acid as a detected human blood metabolite, supporting that the body produces it.
Source:hmdb.ca
(10Z)-heptadecenoyl-CoA
10Z-Heptadecenoyl Coenzyme A is listed as a human metabolite in the Virtual Metabolic Human database, a substance the body produces.
Source:vmh.life