There's very little solid evidence for similar results in people
The meta-analysis of Heydarpour et al., which reviewed five high-quality trials involving 448 women with PCOS, showed that cinnamon supplementation decreased fasting blood sugar, fasting insulin, and HOMA-IR [200]
These can shift sleep, and they can also shift how you react to stimulants, alcohol, and cannabis
It is worth noting that an increase in intestinal colonization by unfavorable microorganisms, such as those of the genera Fusobacterium , Peptostreptococcus , Bacteroides vulgatus , and Bacteroides thetaiotaomicron, and a decrease in probiotic bacteria, such as Lachnospiraceae , Bifidobacterium animalis , and Streptococcus thermophilus , may promote inflammation, DNA damage, and cancer cell proliferation, which contribute to the development of colorectal cancer [18]
Topical bioavailability: Lower but meaningful