The Core Problem — Why Packaging Matters for Dissolved H₂
🔹 Plain English FirstDissolved hydrogen gas behaves like carbonation in a soda — it wants to escape. Open a soda and leave it on the counter, and it goes flat. The CO₂ that was dissolved under pressure escapes into the air. Dissolved H₂ behaves the same way, but with one additional challenge: H₂ molecules are so small that they can permeate through the walls of most plastic containers, even when the container is sealed. A plastic bottle of hydrogen-rich water loses dissolved H₂ through the bottle walls continuously, from the moment it is filled.
🔬 The ScienceThe behavior of dissolved H₂ is governed by Henry’s Law: the concentration of a dissolved gas in a liquid is proportional to the partial pressure of that gas above the liquid. Since atmospheric H₂ is essentially zero, any dissolved H₂ in water is thermodynamically driven to escape until the dissolved concentration reaches equilibrium with the atmospheric partial pressure — effectively zero. H₂ permeability through polymer materials is determined by the diffusion coefficient and solubility of H₂ in the polymer. Common packaging plastics — PET, HDPE, LDPE, and polypropylene — all have measurable H₂ permeability.
🍃 Why It MattersA dissolved H₂ concentration claim on a plastic bottle label reflects the concentration at the time of filling — not the concentration at the time of consumption.
Why Aluminum Works
🔹 Plain English FirstAluminum is a metal. Gases cannot permeate through metals the way they permeate through plastics. A properly sealed aluminum can creates a hermetic barrier — nothing gets in or out through the can walls. The dissolved H₂ that was in the can when it was sealed is still there when the consumer opens it.
🔬 The ScienceAluminum has essentially zero gas permeability — it is a hermetic barrier to all gases including H₂. The can seam and lid are sealed using a double-seam process that creates a mechanically interlocked, hermetic closure. The interior of aluminum beverage cans is lined with a thin polymer coating to prevent direct contact between the beverage and the aluminum. This liner is thin enough that H₂ permeation through it is negligible over the product’s shelf life.
🍃 Why It MattersThe aluminum can is the only standard consumer beverage packaging format that provides a hermetic barrier to H₂. Glass is also impermeable to H₂, but glass bottles with standard closures are not hermetically sealed. Aluminum cans with double-seam lids are hermetically sealed.
Packaging Comparison
| Packaging Format | H₂ Permeability | Hermetic Seal | Dissolved H₂ Retention |
|---|---|---|---|
| Aluminum can (double-seam) | None | Yes | Stable throughout shelf life |
| Glass bottle (standard closure) | None through glass | No — closure not hermetic | Loss through closure over time |
| PET plastic bottle | High | No | Continuous loss from filling |
| HDPE plastic bottle | High | No | Continuous loss from filling |
| Aluminum pouch (sealed) | None | Yes (heat-sealed) | Stable if properly sealed |
Frequently Asked Questions
Why should I drink H2ForLife promptly after opening?
Once the can is opened, the hermetic seal is broken and dissolved H₂ begins to escape into the air. For maximum dissolved H₂ delivery, consume the product promptly after opening — ideally within a few minutes.
Does refrigeration affect dissolved H₂ concentration?
H₂ solubility in water increases at lower temperatures, so refrigeration slightly increases the equilibrium dissolved H₂ concentration. H2ForLife recommends storing cans in a cool location, though refrigeration is not required for H₂ retention in a sealed aluminum can.
Can I transfer H2ForLife to another container?
Transferring to a non-hermetic container will result in rapid dissolved H₂ loss. Standard glasses, cups, or open containers will result in significant H₂ loss within minutes.
