The research team also speculated that spicy foods could have a reinforcing effect, in which they boost testosterone, and thus, more testosterone increases a person’s liking of spicy food — they said, however, this effect had only been seen so far in rats. It’s likely that’s not the case, however. The researchers noted that there could have been two other reasons for the findings: the men with higher testosterone could have been attracted to the hot sauce, with its aggressive red color (studies have found links between these) or maybe they just grew up eating spicy food. But all these show is that spicy food doesn’t cause testosterone levels to jump, even if there’s a correlation.
If testosterone deficiency occurs during foetal development, then masculinisation of the foetus will fail to occur normally and this may give rise to disorders of sex development. If testosterone deficiency occurs during puberty, a boy’s growth may slow and no growth spurt will be seen. The child may also fail to develop full sexual characteristics (hypogonadism) associated with men undergoing puberty, including development of pubic hair, growth of the penis and testes and deepening of the voice. Around the time of puberty, boys with too little testosterone may also have less than normal strength and endurance, and their arms and legs may continue to grow out of proportion with the rest of their body.