Miranda Kerr‘s a big advocate. In an interview with Beauticate this week, she said, “I like to start the day with warm water and lemon [because] I feel like that really helps kick start digestion for the rest of the day.”
Her fellow Victoria’s Secret alumnus Lindsay Ellingson also subscribes to this philosophy. “I had a consultation with the ayurvedic specialist who told me that I should drink warm, filtered water in the morning. He said your body absorbs the warm water better than cold and that it’s really soothing to your stomach,” the supermodel told The Cut last week.
There's equally positive press at the other end of the temperature gauge; you've probably heard, read or been told that a glass of ice cold water has the ability to burn calories.
These claims have been around for years and to the average person they seem, well, kind of legit. But according to accredited practising dietitian and nutritionist Sanchia Parker, the temperature of your drinking water doesn't make a significant difference to your health.
"There is plenty of information available about what different temperatures can do, but not much scientific evidence to back up these claims," she says.
Let's start with the supposed calorie-burning powers of iced water. There's an element of truth to this, but in summary no: tooth-numbingly cold water won't burn off the Tim Tam you just inhaled. (Post continues after gallery.)
"Our body has a set internal temperature, so if we drink a glass of cold water our body has to work to regulate our internal temperature. So theoretically, yes, a glass of icy cold water will burn more calories as our body brings it up to temperature," Parker explains.
"But the amount burnt is negligible. It would be such a small amount that it would not have any impact on weight."
Interestingly, she adds, the more sporty types among us might benefit from an icy drink. "There is some evidence to suggest that cold water can be helpful for athletes as it’s absorbed faster, helping the person to stay hydrated, which has a positive effect on performance."
As for warm water, many of the health claims surrounding it — for example, that it alleviates constipation — aren't necessarily dependent on temperature.