Here's another menopause-related study that may have an alternative explanation. Researchers found that in overweight and obese menopausal women, weight loss significantly improved symptoms of hot flushes. They didn't give any conclusive or plausible explanation for the reason why.
It's clear that if you're overweight or obese, a significantly higher number of women will have undiagnosed obstructive sleep apnea. Losing weight will improved symptoms of obstructive sleep apnea, which include hot flushes, night sweats, mood swings, insomnia, and irritability. We know that even young men can have these same symptoms. These symptoms are not directly caused by hormonal changes per sé—it's the relative change in the person's sleep-breathing status that can cause these vasomotor neurologic symptoms.
For the men out there with obstructive sleep apnea, do you suffer from hot flushes and night sweats?