“Just drinking three liters of water a day… burns 75–100 calories. If you add a little lemon juice to it, which is ascorbic acid, that can speed up your metabolism by 33 percent.”
So says Jackie Warner, host and guru of Bravo’s Thintervention.
While Jackie’s nutritional advice isn’t always inaccurate (she values whole foods and clean eating, and is not particularly carb or fat phobic), she also misses the mark quite a bit, as evidenced by this “come again?” tidbit.
Water does not burn calories. Yes, if you drink ice water, your body burns a few calories to increase its temperature. That is not “cold from the tap”, but “close to freezing”. How often does anyone drink water at such extreme temperatures?
As for ascorbic acid (AKA vitamin C) speeding up metabolism — first I hear of it.
Besides, if one’s diet is unhealthy and if physical activity is non-existent, liters of lemon water are simply minute details of little relevance.