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rink two cups of cold water on an empty stomach a few times a day for weight loss.
I mentioned my Evidence-Based Weight Loss talk (https://nutritionfacts.org/video/evid....
Too good to be true? No. For more on water and weight loss, check out:
• How to Get the Weight Loss Benefits of Ephedra Without the Risks (https://nutritionfacts.org/video/how-...)
• The Effect of Drinking Water on Adrenal Hormones (https://nutritionfacts.org/video/the-...)
• What Is the Safest Metabolism Booster? (https://nutritionfacts.org/video/what...)
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Drink two cups of water and you get a surge of the adrenal hormone noradrenaline
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in your bloodstream as if you just smoked a few cigarettes or downed a few cups of coffee
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which boosts your metabolic rate up to 30% within an hour, which, when put to the test
0:26
Your randomized controlled trials appear to accelerate weight loss by 44 percent
0:31
certainly making it the safest, simplest, and cheapest way to boost your metabolism
0:37
Now, if you're on a beta-blocker drug, this entire strategy may fail
0:41
Beta-blockers are typically prescribed for heart conditions or high blood pressure intend to end with the letters LOL, such as Tylenol, natalol, or propranol
0:51
sold us to Norman Corregard or Indurol, respectively. So, for example, if you give people the beta-blocker drug metoprol
0:59
so it's low-pressure, before they chug their two cups of water, the metabolic boost is effectively prevented
1:05
This makes sense since the beta that's being blocked in beta-blockers are the beta receptors triggered by noradrenaline
1:11
Otherwise, though, the water should work, but what's the best kind of dose-type temperature and timing
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Just a single cup may be sufficient to rev up the noradrenaline nerves
1:23
but additional benefit is seeing him at two or more cups. Caution, one should never drink more than three cups in an hour, though
1:31
since that starts to exceed the amount of fluid your kidneys can handle
1:35
If you have a heart or kidney failure, your physician may not want you drinking extra water at all
1:40
but even with healthy kidneys, any more than three cups of water, an hour can start to critically dilute the electrolytes in your brain
1:47
with potentially critical consequences in how not to diet I talk about the first patient I ever killed in the hospital as an intern I was a guy who had drunk himself to death with water
2:02
He suffered from a neurological condition that caused his pathological thirst. I knew enough to order his liquids be restricted and to have his sink shut off
2:13
but didn't think to turn off his toilet. Anyways, does it have to be plain, straight water
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shouldn't seem to matter, right? I mean, water is water, whether flavored or sweetened in some diet drink
2:25
but it does matter. When trying to prevent fainting before blood donation
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something like juice doesn't work as well as plain water. When trying to keep people from getting dizzy when they stand up
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water works, but the same amount of water with salt added doesn't
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What's going on? We used to think the trigger with stomach distension
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When we eat, our body shifts blood flow toward digestive tract, in part by releasing nor adrenaline to pull in blood
2:50
from our limbs. This has been called the gastrovascular reflex, so drinking water was thought to be
2:56
just a zero-calorie way of stretching our stomach, but instead drink two cups of saline
3:01
basically salt water, and the metabolic boost vanishes, so stomach expansion can explain
3:08
the water effect. We now realize our body appears to detect osmolarity, the concentration of stuff
3:16
within a liquid, covertly slip liquids of different concentrations into people's stomachs
3:20
the feeding tube, and you can demonstrate this by monitoring sweat production, which is kind of
3:25
a proxy for noradrenaline release. This may be a spinal reflex as it's preserved in quadriplegic, or picked up by the liver
3:32
as we see less noradrenal release in liver transplant patients who've had their liver nerves
3:38
severed, whichever the pathway, our body can tell. Thought we only had five senses
3:45
The current count is upwards of 33 so maybe the Bruce Willis movie should have been called the 34th sense In my Daily Dozen recommendation I rank certain T as among the healthiest beverages
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After all, they have all the water of water with an antioxidant bonus
4:01
but from a weight loss perspective, plain water may have an edge
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That may explain the study showing overweight and obese individuals randomized to replace diet beverages with water lost significantly more weight
4:13
This was chalked up to getting rid of all those artificial sweeteners. but maybe instead the diet drinks were too concentrated
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to offer the same water-induced metabolic boost, diet soda, tea, has about ten times a concentration of dissolved substances
4:28
compared to tap water. So, plain water, on an empty stomach, may be the best
4:35
Does the temperature of the water matter? In a journal published by the American Society of Mechanical Engineers
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an engineering professor proposed that the secret of a raw food diet for weight loss
4:45
was the temperature which the food was served. To bring two cups of even just room-temperature water up to body temperature, he calculated
4:54
the body would have to dip into its fat stores and use up 6,000 calories
5:00
Look, just do the math, right? He says a calorie is defined as the amount of energy required to raise one gram of water
5:07
1 degrees Celsius. So since two cups of water is about 500 grams
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and the difference between room temp and body temp is about a dozen degrees Celsius, 500 times 12 equals 6,000 plus calories needed
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Anyone see the mistake? In nutrition, a calorie is actually a kilocalory
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a thousand times bigger than the same word used in the rest of the sciences
5:34
Confusing, right? Still, I'm shocked the paper was even published. So drinking two cups of room water actually only takes six calories to warm up not 6 Now if you were a hummingbird drinking four times your body weight and chilling nectar you could burn up to 2 of your energy reserves warming it up but it doesn make as much
5:54
of a difference for us. What about really cold water, though? A letter called the Ice Diet was published in the yst of Internal Medicine, estimated
6:03
that eating about a quart of ice, like a really, really big snow cone with no syrup
6:10
could rob our body of more than 150 calories, the same amount of energy as the calorie expenditure
6:16
in running one mile. It's not like you directly burn fat to warm up the water, though
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I mean, what your body does is just crows more of the waste heat you normally give off
6:27
by constricting blood flow to your skin. How does it do that
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Nor adrenaline. If you compare drinking body temperature water to room temperature water to cold water
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there's only a significant constriction and blood flow to the skin after the room temp in cold water
6:44
and neither the warm or tepid water could boost metabolic rate as much as cold
6:49
fridge temperature water. So, your body does, after all, end up at least indirectly burning off more calories
6:57
when you drink your water cold. So two cups of cold water on an empty stomach a few times a day
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Does it matter when? Yes, watch my evidence-based weight loss lecture to see how you can add the benefit of negative
7:12
calorie preloading by drinking that water right before your meals
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