Every hemp beverage needs a reliable strategy to control microbial growth. In beer and cider, alcohol helps do that work. A hemp beverage has none, so the protection has to be built into the process.

This guide covers pasteurization: how the methods differ, what to test on a pilot batch, what to do and avoid, and what to use if you aren't pasteurizing. Food safety is a specialized discipline, and we strongly recommend working with a qualified Process Authority throughout.

What is a kill step?

A kill step is a control built into production to eliminate the microbes that could spoil a product or make someone sick. Distributors and retailers look for one.

Without alcohol, a hemp beverage establishes microbial stability through heat or pressure treatment, formulation controls such as pH, or a preservative system. We recommend developing that strategy with a Process Authority from the start.

What is pasteurization, and what are PUs?

Pasteurization uses heat or pressure, held for a calculated time, to eliminate microbes present at production. Depending on the method, it happens before or after packaging, and always before the product is cleared for distribution.

Thermal pasteurization is measured in pasteurization units (PUs). One PU is one minute at 60°C (140°F), and a higher temperature reaches the same PU in less time. The PUs a beverage needs depend on its pH, composition, and the microbes it is most likely to carry, and less acidic beverages generally need more. Beer commonly lands between 15 and 25 PUs.

More PUs generally extend shelf life, and they can also change flavor. Set your target range during formulation, alongside your Process Authority, because pasteurization can alter taste and texture relative to the version you developed on the bench.

How do flash and tunnel pasteurization compare?

Method	Process	Key characteristics
Flash (HTST)	Product runs through a heat exchanger above 160°F for 10 to 15 seconds, before packaging.	The short exposure keeps more of the flavor, texture, and nutrients than longer methods do.
Tunnel	Sealed cans are heated to 140 to 185°F for up to 30 minutes, by hot water sprayed on or submerged around them.	Treats product in its final container on a continuous line, a popular choice when throughput matters.

What other methods exist?

Aseptic processing heats product to 230 to 290°F for a few seconds up to a minute. It sterilizes as effectively as retort, and the short exposure makes it a more viable option for hemp beverages. Test cannabinoid integrity thoroughly before committing to it.

Retort heats product to 230 to 275°F for about five minutes under high pressure. It is not recommended for hemp beverages, because the temperature, pressure, and duration are likely to degrade cannabinoids.

High-pressure processing (HPP) uses pressure of 80 kpsi or more instead of heat. It is known to increase cannabinoid and emulsion degradation depending on how long the pressure is held, so run compatibility and feasibility trials before full-scale production.

Velcorin (dimethyl dicarbonate) chemically inactivates microbes at room temperature over about 12 hours, which suits heat-sensitive formulations. It is also an extremely volatile compound that poses major health risks to people handling it directly. Confirm your manufacturer is prepared to work with it, and review the method with your Process Authority.

How do you test pasteurization on a pilot batch?

Evaluate the process on a pilot batch before committing to full production. Pull one sample during mixing, before any heat treatment, and a second after treatment and before canning. Test both for potency.

A difference between the two indicates heat is contributing to potency loss. Build that loss into your overdose calculation on top of your baseline figure, and reconsider the method if the loss is large. Also test canned product right after canning and again after two weeks, which accounts for downtime between the end of production and the lab receiving your sample.

What is a Process Authority?

A Process Authority (PA) is a recognized food safety expert who analyzes your manufacturing process and formulation and determines whether the product is likely shelf stable and fit for consumption. We strongly encourage working with one for any hemp beverage, ideally during early formulation, so your target PU range and processing schedule are set before production begins.

At the end of an engagement, a PA issues a Process Authority Letter (PAL), which describes your process, validates it, and makes onboarding a co-packer significantly easier. PAs generally charge a separate consultation fee for each SKU. If you would like an introduction to trusted Process Authorities in our network, reach out to hello@perfectlydosed.com.

Do's and don'ts

Do

• Choose your method together with your co-packer, based on what their facility can run.
• Set a target PU range during formulation, alongside your Process Authority.
• Test potency before and after heat treatment on a pilot batch.
• Run compatibility trials before HPP and cannabinoid-integrity

Don't

• Skip the Process Authority. We strongly recommend one for every product.
• Use retort for a hemp beverage.
• Boil the product for extended periods, or boil the emulsion on its own.
• Choose Velcorin unless your manufacturer is equipped and comfortable handling it.
• Assume pasteurization will leave taste and texture untouched.

What if you aren't pasteurizing?

A chemical preservative system is the alternative. Potassium sorbate protects against yeast and mold, and sodium benzoate protects against bacteria. Both work best in acidic beverages, generally below pH 4.6, though potassium sorbate stays effective at higher pH, up to around 6.5. Follow the FDA's concentration limits for preservatives in Title 21 of the Code of Federal Regulations.

Preservatives inhibit microbial growth, but they do not replace process validation. Whether FDA low-acid or acidified food rules apply to your beverage depends on its pH, water activity, carbonation, and packaging, and a Process Authority can determine where yours lands. This is another reason we strongly recommend involving one early.

Questions?

For questions about any method in this guide, reach out to us at hello@perfectlydosed.com.

This guide is for general informational purposes only and is not legal, regulatory, or food safety advice. Confirm processing parameters with a Process Authority, formulator, or manufacturer.