Evidence from high-altitude adaptation studies indicates that maintaining moderate or lower hemoglobin levels—rather than excessive increases—protects against chronic mountain sickness and confers physiological advantages.
The claim states that low hemoglobin provides physiological benefits in high-altitude populations. Multiple papers (such as [2], [4], and [8]) discuss how high-altitude natives like Ethiopian highlanders or individuals who successfully avoid excessive erythrocysis bypass chronic mountain sickness (Monge's disease) and oxidative stress. Therefore, moderate or lower hemoglobin is recognized as an adaptive advantage rather than a deficit. The retrieved papers directly support this.