Why Minerals Are the Key to True Hydration—and How Reverse Osmosis Delivers the Purest Water

Not all Water is Created Equal

We drink it every day. Cook with it. Take it for granted. But have you ever wondered what's really in your water – or what isn't?

At healmeal, we asked ourselves this question. And the answer led us to invest in a reverse osmosis system. Is it excessively complex? Yes, definitely. Is it worth it? Absolutely.

Let us show you why.

What exactly is reverse osmosis?

Reverse osmosis (RO) is one of the most thorough water filtration methods. It involves pressing water through an extremely fine membrane – so fine that only H2O molecules can pass through.

This means: Everything else stays out.

What is filtered out?

• Pesticides
• Herbicides
• Heavy metals
• Drug residues
• Viruses
• Bacteria
• Microplastics
• Limescale deposits
• Chlorine
• Other chemicals

Sounds good, right? But there's a catch.

The Problem: "Dead Water"
If reverse osmosis filters so thoroughly, it also means: All minerals are removed.

The result is so-called "demineralized water" – pure H2O, but without the minerals your body needs. It tastes flat, doesn't feel right – and most importantly: It doesn't hydrate you optimally.

Why? Because true hydration is more than just drinking water. What hydration truly means

Many people think: "I drink a lot of water = I'm well hydrated." But it's not that simple.

Hydration = Water + Minerals

Your body needs minerals like:

• Magnesium for muscle and nerve function
• Calcium for bones and cell communication
• Potassium for fluid balance and heart function
• Sodium for osmotic pressure in cells

Without these minerals, your body cannot properly absorb water and transport it to the cells. You drink, drink, drink – but are still not properly hydrated.

This is why some people drink liters of water and still feel thirsty or sluggish.

The Solution: Remineralization
Here's the crucial point: After reverse osmosis, the water must be remineralized.

At healmeal, we work with volkswasser.de, who make exactly that possible. The system not only filters extremely thoroughly but then also adds back the important minerals.

Yes, a reverse osmosis system is complex:

• Filtration takes a long time
• Large tanks are needed
• Maintenance is intensive
• The initial cost is higher

But for us, it was a no-brainer. Why?

1. Microplastics are a real problem

Studies have shown: Commercial plastic bottles contain between 110,000 and 370,000 plastic fragments per liter. These are tiny particles that leach from the bottle – especially if the water is transported warm or stored for a long time.

Microplastics enter your body, accumulate, and can promote inflammation in the long term. Research on this is still in its infancy, but the initial results are concerning.

Even glass bottles are not always free of microplastics – particles can detach from plastic cleaning brushes or labels.

With reverse osmosis? Almost completely filtered out.

2. Pesticides and Residues

Even though German tap water is strictly controlled: It can contain traces of pesticides, herbicides, or drug residues. These substances may be "harmless" in small quantities – but why should we have them in our food at all?

3. No Fluoride Problem in Germany

A quick note, because this is often discussed: Drinking water in Germany is not fluoridated. Over 90% of German water naturally contains less than 0.3 mg of fluoride per liter – which is harmless and no cause for concern.

Unlike countries such as the USA or Australia, where fluoride is actively added, this is not an issue in Germany.

How can you hydrate optimally?

If you don't have a reverse osmosis system at home (which is completely understandable), there are still ways to hydrate well:

1. High-Quality Water in Glass Bottles

Spring mineral water in glass bottles is a good option. Make sure it actually contains natural minerals (stated on the label).

2. Supplement Minerals

If you drink a lot of filtered water, you can supplement minerals – for example, by:

A pinch of Himalayan salt in the water
Electrolyte powder (without sugar!)
Mineral-rich foods like leafy greens, nuts, seeds