Marie Cachet the wife of Varg Vikerness (thulen perspective) details the terrible effects of gene mixing between different species and how it influences bone development, vitamin d deficiency, testosterone/DHT, depression, domestication, impotency and so on. An interesting read for people who are already wary of the dangers of race mixing with a non European partner.
https://atala.fr/chapter-1/
This is an inescapable pill the likes of which cannot be altered after birth. If you have seen my previous posts or watch varg vikerness on youtube you will know the purity of blonde and red haired non brown eyed humans which is a great consideration when understanding how pure of a European you are. On a separate note all the strongest lifters and in general, people in the world are mostly Scandinavian and Scottish.