1. Ice-Cold Water
Why it’s concerning:
Drinking very cold water can cause temporary constriction of blood vessels (vasoconstriction), which may:
Raise blood pressure briefly
Increase heart rate as the body works to maintain core temperature
Potentially trigger discomfort in people with existing heart conditions
Who should be especially cautious:
✅ People with diagnosed cardiovascular disease
✅ Those with Raynaud’s phenomenon or cold sensitivity
✅ Individuals recovering from cardiac events
What to do instead:
✅ Sip room-temperature or slightly warm water
✅ Keep a small glass by your bedside for nighttime thirst
✅ Hydrate well throughout the day so you’re less thirsty at night
🌡️ Science note: While cold water causes temporary vascular changes, healthy hearts typically adapt without issue. The concern is primarily for those with pre-existing conditions.