wieviel gene hat ein mensch — what can you do yourself?

The current estimate of human protein-coding genes is about 20,000–25,000, plus thousands of non-coding RNA genes. This number is not fixed – it varies by database and definition. What can you do yourself? You can take a consumer DNA test (e.g., 23andMe, MyBody-X), download your raw data, and analyze it with third-party tools like Promethease or Genetic Genie. This can reveal variants for traits like lactose intolerance, caffeine metabolism, or certain drug responses. However, most of these analyses are not clinically validated; many associations are weak or based on small studies. You cannot change your genes, but you can use the information for lifestyle adjustments – diet, supplements – with caution and ideally after consulting a doctor. The evidence for self-directed action is mixed: strong for a few pharmacogenetic markers (e.g., CYP2C19*17), but weak for most other areas. Knowing the number of genes alone is not actionable.