Could Fermentation Unlock a New Market for Hemp Drinks?

For years, hemp beverages have largely been defined by what manufacturers add to them, particularly CBD and intoxicating hemp-derived cannabinoids. New research suggests another possibility: using the hemp plant itself as a fermentation substrate to create products with distinctive flavors and naturally occurring bioactive compounds.

A study¹ published in Food Bioscience compared traditional black tea kombucha with four beverages fermented using a symbiotic culture of bacteria and yeast, better known as a SCOBY. The alternative formulations contained moringa and jasmine, coffee and cocoa, medicinal hemp, or fireweed and ginkgo.

The hemp beverage was not the strongest performer in every category. In fact, the coffee-cocoa formulation recorded considerably higher antioxidant activity and overall consumer acceptance. What made hemp interesting was its unusual chemical signature. It contained a combination of phytochemicals that distinguished it from every other beverage tested.

This points toward a potentially valuable new role for hemp. Rather than treating the crop primarily as a source of cannabinoids, seeds, oil, protein, or fiber, manufacturers may be able to use controlled fermentation to produce an entirely different class of functional beverage.

How SCOBY Fermentation Changes Plant Ingredients

Kombucha is traditionally made by adding a SCOBY to sweetened black or green tea. The culture contains a community of bacteria and yeast that consumes sugar and produces acids, carbon dioxide, and other metabolites. These reactions create kombucha’s familiar tart flavor and light effervescence.

The microorganisms can also transform compounds already present in the plant material. Their enzymes may break chemical bonds that keep certain compounds attached to the plant matrix, potentially making those compounds easier to extract or changing them into different metabolites.

This does not mean fermentation automatically makes every ingredient healthier. Its effects depend on the substrate, microbial community, temperature, sugar concentration, and duration of fermentation. It can increase some compounds, reduce others, and substantially alter acidity and flavor.

That variability is precisely what makes the process commercially interesting. A SCOBY is not merely a production tool for tea. It could be treated as a biotechnology platform for designing beverages with different chemical and sensory characteristics.

What Researchers Found In The Hemp Beverage

The researchers analyzed five commercially produced, unpasteurized beverages from a Polish manufacturer. Each product was made with the same SCOBY under what the company described as standardized conditions.

The hemp formulation contained 12 detected phytochemical metabolites. It had the highest concentrations of apigenin, p-coumaric acid, epicatechin gallate, and 2-hydroxycinnamic acid among the products tested. Quercetin was found only in the hemp beverage, although at a relatively low concentration.

These results reinforce an important lesson emerging across hemp research: Cannabis sativa is chemically valuable for reasons extending well beyond CBD and THC. Recent work has similarly identified nutritional and functional possibilities in hemp oil and its processing byproducts, while studies of bioactive compounds in cannabis roots have highlighted the largely unexplored value of other plant tissues.

Hemp Did Not Produce The Strongest Antioxidant Drink

The hemp findings require careful interpretation. Its distinctive composition did not translate into the highest total antioxidant capacity.

The coffee-cocoa beverage dominated the broader comparison. It contained 2,077.50 mg GAE/L of total polyphenols, compared with 317.50 mg GAE/L in the hemp beverage. It also produced the strongest results in all three antioxidant assays and contained the most vitamin C and total flavonoids.

Traditional black tea kombucha also exceeded the hemp formulation in total polyphenols, flavonoids, vitamin C, and antioxidant activity. Therefore, the study does not support describing hemp kombucha as superior to conventional kombucha or other plant-based fermentates.

Its significance lies in specialization rather than overall dominance. The hemp beverage delivered a different assortment of compounds, including several that were highest or unique within the comparison. This could allow product developers to select hemp for a particular formulation goal instead of simply maximizing one broad measurement such as total antioxidant capacity.

Why Antioxidant Measurements Need Context

Laboratory antioxidant assays measure how a sample reacts under controlled chemical conditions. They do not establish that drinking the product will prevent disease, reduce inflammation, or deliver the same activity inside the human body.

Digestion, metabolism, dosage, bioavailability, and interactions among ingredients all influence what happens after consumption. Reviews of cannabis derivatives in functional foods describe considerable potential, but they also emphasize the need for better evidence concerning formulation, safety, and biological effects.

The current findings should consequently be understood as product-development evidence. They identify chemical leads worth investigating, not clinically proven benefits.

Taste May Be The Larger Commercial Challenge

A functional beverage cannot succeed on chemistry alone. Consumers must also want to drink it.

The study’s sensory panel evaluated aroma, sweetness, acidity, color, and overall acceptability using a nine-point scale. The hemp beverage received some of the lowest scores for sweetness and acidity. The researchers suggested that herbal, bitter, or astringent characteristics may have affected its reception.

Nevertheless, every formulation achieved overall acceptance above the midpoint of the scale. That suggests the hemp product was not rejected outright, but it likely requires additional refinement.

Possible development priorities include:

• Balancing bitterness with complementary fruit or botanical flavors
• Adjusting fermentation time to control acidity and aroma
• Testing hemp leaves from different cultivars and growing conditions
• Standardizing sugar, temperature, and microbial composition

The coffee-cocoa beverage earned the highest overall acceptability score at 8.22. Its familiar flavor profile probably gave it an advantage that hemp could not match without careful formulation. This is a reminder that novel ingredients must satisfy both analytical targets and ordinary consumer expectations.

Fermentation Could Expand The Hemp Value Chain

The broader opportunity is not limited to one drink. Fermentation could give growers and processors another market for hemp leaves or other plant material that may be underused after harvesting.

Hemp is already being studied for oil, protein, fiber, construction materials, and upcycled food ingredients. Research into hemp seed powder as a functional ingredient demonstrates how processing residues can become higher-value products instead of waste.

A fermented beverage category could extend that approach. Producers might develop non-intoxicating botanical drinks, combine hemp with more familiar flavors, or target consumers interested in alcohol alternatives and plant-based products. Unlike a standard cannabinoid drink, the value proposition could focus on fermentation, flavor, and the wider phytochemical composition of the crop.

This distinction may become increasingly important as rules governing cannabinoid beverages change. A product based on hemp leaves is not automatically free from cannabinoid regulations. Manufacturers would still need to test the raw material and finished beverage for THC, CBD, and other cannabinoids, particularly because fermentation can affect chemical stability. Previous research examining cannabinoids before and after fermentation demonstrates why the finished product must be analyzed rather than assuming its composition from the starting material.

Food Safety And Manufacturing Consistency Matter

The hemp beverage had a median pH of 4.10, placing it within the 3.5 to 4.2 range described by the researchers as appropriate for fermented beverages. However, being close to the upper end of that range leaves little room for inconsistent production.

Commercial kombucha guidance generally calls for a finished pH below 4.2 while avoiding excessive acidity below 2.5. The safe preparation of kombucha also depends on sanitation, controlled fermentation, proper storage, and monitoring for contamination.

Scaling hemp fermentation would therefore require more than selecting an appealing recipe. Manufacturers would need reproducible microbial cultures, validated production controls, shelf-life testing, cannabinoid analysis, and batch-level chemical testing. An unpasteurized product may also continue changing during distribution, potentially affecting flavor, pressure, alcohol content, and acidity.

What The Study Still Cannot Tell Us

The research provides an intriguing starting point, but it has important limitations. All beverages came from one manufacturer, and exact batch numbers, production dates, ingredient ratios, and fermentation durations were unavailable. Some drinks contained two plant substrates, making it impossible to determine how much each ingredient contributed.

There were also no matching unfermented controls. As a result, the researchers could characterize the finished hemp beverage but could not establish which compounds increased, decreased, or appeared specifically because of SCOBY fermentation.

Most importantly for the cannabis industry, the study did not report cannabinoid concentrations. Future research should measure cannabinoids before, during, and after fermentation while also identifying the bacteria and yeast responsible for specific chemical changes. Human studies would then be needed before making health claims.

Hemp Kombucha Is A Platform, Not A Finished Answer

The study does not establish hemp as the best substrate for kombucha. It does something more useful: it demonstrates that hemp can produce a chemically distinct and reasonably acceptable SCOBY-fermented beverage.

That opens a product-development pathway beyond conventional CBD and THC drinks. With improved flavor, standardized fermentation, cannabinoid testing, and stronger biological research, hemp could become part of a new generation of fermented botanical beverages.

The opportunity is not to sell another miracle drink. It is to use fermentation as a controlled tool for extracting more value from a complex and still underexplored crop.

References:

^{1. Melkis, K., Szymczykowska, K., Maciejewska-Markiewicz, D., Skonieczna-Żydecka, K., & Jakubczyk, K. (2026). Phytochemical composition, antioxidant capacity, and quality attributes in novel plant-based fermented beverages with SCOBY. Food Bioscience, 84, 109864. https://doi.org/10.1016/j.fbio.2026.109864}