童年環境會影響男性激素濃度！英國杜倫大學調查359名試驗者的研究發現，童年生長在艱困環境的人，擁有較低的睪固酮，安逸環境下長大的人則睪固酮較高。高濃度的睪固酮會增加罹患攝護腺癌的機率，低濃度睪固酮則導致精神差、生育能力低。研究主持人馬吉德博士表示，這項研究挑戰睪固酮受基因、種族影響的理論，童年環境應納入特定疾病評估項目。
「依據能量投資理論，困難的環境可能充斥較多感染性疾病、缺乏營養。」馬吉德向《獨立報》解釋，因為生長在較差環境的人，需要把能量集中在生存上，並因此而減少分配給生殖的能量，性賀爾蒙自然會降低。生長在安逸環境的人，則可以將能量分配給生殖器官，較易繁衍後代。但馬吉德強調，此項研究內的對象，賀爾蒙濃度沒有低到影響生殖的程度。
根據報導，研究團隊調查359名原生孟加拉人、童年移民至英國的孟加拉人、成年後才移民英國的孟加拉人、孟加拉移民第二代和原生英國人。研究團隊收集受試者的身高、體重、青春期發生的年齡等資訊，並測量他們唾液中的睪固酮濃度。
研究顯示，童年成長於英國的受試者擁有比較高的睪固酮，成長於孟加拉的人的睪固酮濃度較低。馬吉德表示，童年環境似乎會影響睪固酮濃度，影響持續到19歲青春期結束，但成年環境就不再發揮影響。馬吉德說，睪固酮濃度高低能評估一個人的健康，他建議，童年成長環境應納入某些賀爾蒙疾病的評估項目。
Childhood environment affects male hormone concentrations! A study of 359 testers surveyed by Durham University in the United Kingdom found that people who grew up in difficult environments had lower levels of testosterone, and those who grew up in a comfortable environment had higher levels of testosterone. High concentrations of testosterone increase the risk of developing prostate cancer, while low concentrations of testosterone cause poor mental health and low fertility. Researcher Dr. Majid said that the study challenges the theory that testosterone is affected by genes and races, and that the childhood environment should be included in specific disease assessment programs.
"According to the theory of energy investment, the difficult environment may be full of infectious diseases and lack of nutrition." Majid explained to the Independent that because people living in a poor environment need to concentrate energy on survival, and thus reduce distribution. For the energy of reproduction, sexual hormones will naturally decrease. People who grow up in a comfortable environment can distribute energy to the reproductive organs and are more prone to reproduction. But Majid stressed that the target of this study, the concentration of hormones is not low enough to affect the degree of reproduction.
According to the Science Daily, the research team surveyed 359 native Bangladeshi, Bangladeshi immigrants to the UK, Bangladeshi immigrants to the UK, second-generation Bangladeshi immigrants and native British. The research team collected information on the subject's height, weight, age at puberty, and measured the concentration of testosterone in their saliva.
Studies have shown that subjects who grew up in the UK had higher levels of testosterone, and those who grew up in Bangladesh had lower concentrations of testosterone. Majid said that the childhood environment seems to affect the concentration of testosterone, and the effect lasts until the end of puberty at the age of 19, but the adult environment no longer has an impact. Majid said that the concentration of testosterone can assess a person's health, he suggested that the childhood growth environment should be included in some of the hormone disease assessment projects.
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