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Five-minute humming habit: what new research means for Thai heart and brain health
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A new wave of headlines says five minutes of humming can boost heart and brain health.
A recent study finds no clear short-term cognitive or emotional benefits from humming alone.
Humming can raise nasal nitric oxide levels.
Researchers have linked nasal nitric oxide to better sinus function and blood vessel relaxation (PubMed study).
The idea that humming helps the vagus nerve and heart rate variability has spread online.
The claim appears in lifestyle stories and wellness guides across Asia (Times of India).
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