Drink only when you're thirsty, only as much water is necessary to kill your thirst. Water as an unpredictable source of deuterium. "If you don't know the deuterium content you have to limit the intake." Developing diabetes insipidus from excessive water drinking, making you even more thirsty Tristan Scott: "You said that you drink as little water as possible, and then when you do. . ." Dr. László Boros: "No. I only drink when I'm thirsty, […] and I drink as much as water is necessary to kill my thirst, and that's usually rain water below 125 PPM. It's very simple. […] It's deuterium depleted, but it's in the rain, kind of a good fall rain, 125 PPM or below. Tap water is 143 PPM to 155 PPM, most of the major cities. If it's coming from higher elevations, from for example the Colorado River, it may go down to 138 PPM. But it's still very high when you drink two or three liters of it a day. […] "I consider everything that you put in your body as a deuterium source, potentially. If you don't know the deuterium content you have to limit the intake. "The other problem is with excessive water drinking without salt is that osmolarity will drop in your blood. Osmolarity will drop in your brain cell, so you will actually have brain swelling that dismantles the hypophysis or the pituitary gland. It's actually locked into your sella turcica, which is a bony little compartment. That's where this organ, this pituitary gland, sits in. If you drink water excessively, this gland kind of expands in this bony capture, or it's capsizing this bony compartment called sella turcica […], and actually start compressing on ADH releasing cells, the antidiuretic hormone, and also sex hormone, and growth hormone, and thyroid hormone regulating cells, because they are all produced by the pituitary gland. So if those are swollen then your antidiuretic hormone is not helping you to preserve water, so you develop diabetes insipidus, and you have to drink more because you are more thirsty, simply because you are unable to salvage water through the actions of antidiuretic hormone, which prevents diuresis. It actually retains water from your primary filtrate in your kidneys, so you cannot regulate your own water homeostasis. "So you're actually exposed to an environmental, unpredictable deuterium source in the form of water. […] "Actually, you can actually die of water poison, you can die of brain swelling. […] Excessive water drinking without thirst is causing more harm that you can actually imagine. […] Your body has your thirst or any other natural signal. For example, if you're hungry you eat, if you're tired then you sleep, if you're thirsty then you drink. […] "Actually if you drink excessively, like let's say a liter of water half an hour, you're going to pee out 1.3 liters of water in the next four hours for sure, but it's gone in the next two hours practically. So it's useless. Your body is trying to get rid of it simply because it didn't need it. So you are constantly challenging your body to kind of overcome your behavioral patterns simply that are physiologically, biochemically totally against your own regulatory systems. Those are overdriven by media, by advertisements, and the list just goes on and on. That's our scientific position on this whole issue." […] "If you're thirsty, drink as much as is necessary. When we were kids we went out on these school trips, and I remember teachers telling us when we were like, 'Oh, I'm thirsty. I'm thirsty,' they said, 'Just don't drink. Don't drink. If you're still thirsty in five minutes, wait five minutes,'" Tristan: [laughs] Dr. László Boros: "'then you get one little sip. That's it.' And actually it was sufficient. Well, we were lean. We were not like as obese as nowadays these kids, unfortunately." Dr. László Boros with npub1yd2h2lrwchshvm46jq7auh65tjkxmgnapkavh7tjtqq07kknupxsa980tv @ 01:29:12–01:30:14, 01:31:40–01:36:26 & 01:37:33–01:38:12 (posted 2023-11-28) https://youtu.be/U6nw_3m_k74&t=5352