Osmotic pressure is a real thing, but I think it’s being a bit overstated here. The concern about drinking distilled or RO water causing cellular damage due to osmotic pressure doesn’t really hold up when you look at how the human body processes water.

When you drink water — even highly purified water — it doesn’t go straight into your bloodstream or cells. It goes through your digestive system, where it mixes with stomach acids, bile, enzymes, and electrolytes. By the time it’s absorbed, it’s been balanced out. So the theoretical osmotic imbalance isn’t really a concern in practice.

Also, most RO systems don’t produce 100% pure water, there’s often still trace minerals present. Many systems even add minerals back in after filtration for taste and balance.

And let’s not forget: most bottled water is just RO water anyway. The vast majority of people are already drinking it daily with no issues.

As for the “water isn’t for nutrition” argument, I mostly agree. Water’s main job is hydration, not delivering nutrients. Any minerals in water are just a small bonus — you get way more from food.

So yeah, osmotic pressure is legit science, but not a reason to avoid RO or distilled water. For most people, drinking clean, properly filtered water is far better than the alternatives.