Major diseases of the skin, bones and other parts of the body could be the cause or consequence of an unhealthy lifestyle or failure to pay attention to certain factors that could affect the body more than usual. Predisposition to hypertension, panic disorders and more are included.

Addiction to substances such as caffeine, alcohol and smoking may have genetic roots. The likelihood of developing these addictions may also be influenced by the reaction to stress and how one copes with it, this is another condition that could be detected by genetic analysis.

Some unusual bodily reactions may be misunderstood as embarrassment, while they may have different causes. Sneezing, twitching, and headaches could be caused by genetic variations leading to misophonia, restless leg syndrome, and other conditions.

Sleep, morning attitude and many other night-related behaviors can be studied through genetic analysis. The chronotype, the predisposition to feel more energetic at a certain time of day or night, or the effect of caffeine on sleep can also be a genetically generated phenotype.