The clear answer
Removing minerals is not a good reason to reject RO. Water is for hydration; a balanced diet is the more reliable source of calcium, magnesium and other essential minerals. Velta prioritises the broader purification barrier instead of compromising it to retain minerals from the source water.
A reverse-osmosis membrane reduces dissolved minerals because it is designed to separate dissolved substances from drinking water. That same tighter barrier is the reason RO can address more than sediment, taste and odour. The small and inconsistent mineral contribution from water is not worth weakening that barrier.
Your Minerals Should Come From Food
WHO’s review of drinking-water hardness says food typically contributes more than 80% of calcium and magnesium intake, while water commonly contributes about 5–20%. The exact amount in water changes by source, location and season; food is far easier to choose and manage consistently.
This is the practical point: a purifier should not be expected to complete your diet. It should provide a strong barrier between the household and unwanted substances in its drinking water.
One Meal Can Outweigh Days of Water Minerals
A simple comparison shows why water should not carry the burden of nutrition.
Scroll table horizontally →
| Example | Mineral amount | What it means |
|---|---|---|
| 2 litres/day for 7 days of water containing 10 mg/L magnesium | 140 mg magnesium | Seven days of this drinking water |
| 28 g roasted pumpkin seeds | 156 mg magnesium | One small serving provides more |
| One 227 g serving of plain low-fat yogurt | 415 mg calcium | One familiar food provides a substantial amount |
The figures change with the water source and food chosen, but the lesson remains: minerals are obtained more reliably through diet than by accepting a looser purification barrier.
Is Mineral-Free Water “Dead Water”?
No. “Dead water” is a marketing phrase, not a scientific water category. Water’s core role is hydration. Mineral content can affect taste, scaling and dietary contribution, but a TDS number does not measure vitality, safety or nutritional completeness.
A Filter Cannot Select “Good” by Marketing Language
Systems that retain dissolved minerals also allow other dissolved substances to remain unless another treatment stage is proven to reduce them. This does not mean every mineral-retaining filter is useless; carbon and ultrafiltration each have valuable roles. It means they do not provide the same broad dissolved-substance barrier as RO.
Velta therefore starts with purification. RO reduces particles and a wider range of dissolved substances, while the pre-filters protect the membrane and the final carbon stage refines taste. We do not weaken that treatment barrier simply to retain a small and inconsistent amount of minerals from the source water.
Velta’s recommendation
Do not choose a purifier because it advertises that it “keeps good minerals”. Choose the stronger purification foundation and obtain essential minerals through a varied diet, where their contribution is far more meaningful than it is from drinking water.
Why RO Water Can Taste Different
Minerals influence taste and mouthfeel, so purified water may initially taste lighter than the water you are used to. That difference is not evidence that the water is nutritionally incomplete. Water’s primary role is hydration; a varied diet is the more meaningful and reliable source of essential minerals.
Why Velta Chooses RO
RO is Velta’s preferred purification foundation because its much tighter membrane can reduce dissolved solids and support a broader range of contaminant-reduction claims than common sediment, carbon or ultrafiltration systems alone.
It costs more to engineer and maintain because it performs a more demanding treatment job. For a household choosing between preserving a small, variable amount of minerals in water and gaining a broader purification barrier, Velta chooses the broader barrier.
Common questions
RO and Minerals FAQ
Will RO water cause a mineral deficiency?
RO lowers minerals from water, but deficiency depends on total diet and individual health, not the purifier alone. Food normally supplies most calcium and magnesium.
Do I need an alkaline or mineral cartridge?
Not automatically. It may suit your taste or application. Check what it adds, the output evidence and replacement plan rather than relying on the word “alkaline”.
Is low TDS the same as pure and safe?
No. TDS is one broad measurement. It does not identify individual contaminants or prove microbial safety. Exact treatment claims and maintenance matter.
Official sources checked 31 July 2026