A ginger ingredient brief needs to distinguish the smell of ginger from the warming bite expected in the mouth. Buying on a single gingerol or shogaol figure leaves the aroma decision unresolved. Original studies of dried ginger and ginger extracts measured pungent compounds separately from essential-oil yield or volatile profiles, and those measurements did not always favour the same sample.[2][4]
For a beverage developer, the useful purchasing question is therefore more specific than “Which ginger is strongest?” Decide whether the ingredient is meant to supply fresh ginger character, a pronounced warming finish, or both. Then compare the materials on that basis, including what remains after the intended manufacturing process.
Heating can favour shogaols while reducing recoverable oil
A 2018 study used ginger rhizomes from a farm in Tehran, cut into slices and dried by open sun, solar tunnel or hot air. The hot-air treatments used an electric convection oven at 120, 150 or 180°C; drying duration was determined by a final moisture content of 10 ± 0.2%.[4] These are slice-drying conditions, not a recommended beverage heat treatment.
The results separate a shogaol target from an essential-oil target. Compared with open sun drying, hot-air drying reduced gingerols and increased shogaols under the study conditions. Yet recoverable essential oil was higher in the sun- and solar-tunnel-dried material than in the hot-air treatment evaluated at 150°C; the difference between sun and tunnel drying was not significant.[4]
“Recoverable oil” is the precise endpoint here. The researchers boiled dried ginger with water for five hours in a Clevenger apparatus to recover the oil.[4] They did not measure how strongly a customer would smell ginger in a finished drink. The result supports a processing tradeoff between two chemical endpoints, rather than a numerical prediction of aroma loss.
Nor did more heat keep producing more shogaol. The paper reports lower shogaol contents at 180°C than at 150°C, and its separate 150°C time experiment showed a decline when treatment was extended from six to seven hours.[4] A request for “more heavily heated ginger” is consequently less useful than a request for the measured gingerol/shogaol profile of the material being offered. The temperatures and times describe that experiment; they are not a universal optimum for ginger manufacture.
Do not mistake a lot difference for a heating effect
A 2021 Australian study compared three processing-grade ginger samples from the 2017, 2018 and 2019 growing years. The authors described their quality as low, average and high, respectively, using anecdotal information and organoleptic testing.[2]
The HPLC results put 6-gingerol highest in the 2019 sample, but 6-shogaol highest in the 2018 sample.[2]
| HPLC measurement, mg/kg of dried powder as received | 2017 sample | 2018 sample | 2019 sample |
|---|---|---|---|
| 6-gingerol | 2017 sample2,215 ± 101 | 2018 sample3,491 ± 26 | 2019 sample5,383 ± 270 |
| 6-shogaol | 2017 sample836 ± 50 | 2018 sample1,063 ± 19 | 2019 sample709 ± 15 |
Values are means ± one standard deviation, n = 3, from Table 1; extraction was performed in triplicate. The denominator is the dried powder on an as-is basis, not fresh rhizome or moisture-corrected dry matter.[2] These three growing-year samples do not establish a rule that older ginger contains more shogaol.
The GC-MS comparison also put the largest summed peak area in the 2018 sample and the smallest in the 2019 sample. The selected compounds included zingiberene and geraniol, but also gingerol-related compounds such as 6-shogaol; this was not a measurement of aroma alone. Table 2 reports percentages of chromatographic peak area, not mass percentages in the ginger. The dichloromethane-extract method used no internal standard and was described as semi-quantitative.[2] Neither the summed area nor a single compound’s peak establishes which sample smelled best.
For sourcing, this is a reason to request the actual sample’s profile and processing history rather than use harvest year as a quality score. The study compared different growing-year materials; it did not age one starting lot under controlled conditions.[2] A difference between two supplier samples cannot be attributed to drying temperature merely because one contains more shogaol.
Extraction can change the comparison again
In a 2022 Korean study, researchers compared squeezed raw ginger juice with several aqueous extracts prepared from hot-air-dried ginger powder. The powder-based routes included simple infusion, hydrothermal extraction and high-pressure extraction, with and without enzyme assistance.[1]
Both enzyme-assisted routes gave higher reported extraction yields and higher UPLC values for the individual 6-, 8- and 10-gingerols and shogaols than the simple infusion. Table 1 reports yields of 55.40% for hydrothermal enzyme-assisted extraction (HWE), 67.60% for high-pressure enzyme-assisted extraction (HPE), and 16.26% for the infusion (GT); section 2.3 describes yield on a dry-weight basis relative to the starting material. These percentages are extraction yields, not percentages of gingerols or shogaols. The electronic nose and GC-MS/MS also distinguished the extracts’ chemical profiles.[1] That finding concerns what was extracted into these systems. It does not mean that the more concentrated or higher-yield extract reproduced fresh juice aroma more faithfully.
Two details matter when reading supplier claims based on this work. First, its high-pressure route was not a heat-free process: the method retained subsequent heating steps, including 93°C for one hour and a final five-minute boiling step. The pressure stage itself was 100 MPa at 50°C for two hours.[1] Second, the fruity/fresh aroma descriptors were derived from electronic-nose analysis, while taste interpretations such as reduced bitterness drew on free-amino-acid measurements and their assigned taste properties. The methods do not report a human tasting panel.[1] “More fruity” or “less bitter” should not be presented as demonstrated consumer experience from this experiment.
The commercial implication is to keep material identity in the comparison. A dried rhizome powder, squeezed juice and water-soluble extract are different starting points. Ask which one the sample represents before comparing its assay with a competitor’s figure.
A spray-dried powder also brings a carrier and a process history
A 2025 experiment spray-dried Welsh-grown ginger juice with modified starch, pea protein or inulin, alongside a no-carrier formulation. Carrier quantities, added water and inlet/outlet temperatures varied across the formulations.[3] It was not a comparison in which carrier identity alone changed.
The authors observed a fine, free-flowing powder in one modified-starch formulation, pump blockage and low powder recovery with the tested pea-protein formulation, and insufficient powder yield to determine moisture for the no-carrier sample.[3] These observations make powder handling a legitimate part of ingredient selection. They do not show that every pea-protein formulation fails or that carrier-free ginger powder is commercially impossible.
The chemical work used flow-infusion electrospray mass spectrometry without chromatographic separation. It compared relative signals for tentatively identified Level 2 compounds, including 10-shogaol and zingerone, rather than measuring their contribution to the smell of a drink.[3] Those signals are not absolute shogaol specifications or a mass balance proving how much ginger chemistry survived drying. The carrier ratio is also unresolved: Table 1 lists 39.36 g inulin with 137 g juice containing 4.92% solids. That works out to about 5.84 g inulin per gram of ginger solids, whereas the results text says 2:1 and Table 2 labels the inulin powder 3:1 without specifying that ratio’s basis.[3] It is useful evidence of formulation dependence, but not a sound basis for copying a carrier ratio into a purchasing specification.
Put the desired ginger character in the buying brief
Start with the finished product description: for example, a ginger drink with a recognisable fresh aroma and a moderate warming finish. That is a proposed sensory target, not a claim that one of the research treatments achieved it.
Ask suppliers to identify the material being quoted, its extraction and drying route, its carrier composition, and the reporting basis of the assay. A percentage in a finished powder should not be silently compared with a percentage calculated on carrier-free extract solids. Where pungency is the purchasing driver, request the individual gingerols and shogaols included in the reported total rather than assume that “total ginger actives” means the same thing in every quotation.
For an aroma-led project, retain a reference sample that the development team has accepted in the intended base. Compare candidate materials after the project’s established manufacturing process, at the intended serving conditions. Record aroma character and warming sensation separately, along with the ingredient dose needed to reach the agreed target. This is a proposed development approach; none of the cited studies establishes that finished-product target or dose.
Use the result to choose the material, then compare cost at the accepted use level. A high shogaol assay may be relevant to a warming profile, but it does not answer whether the product smells like the ginger the customer expects. The evidence supports buying those attributes separately rather than allowing one analytical number to stand in for the whole flavour.[1][2][4]
Sources
[2] Pungent and volatile constituents of dried Australian ginger
[3] Effect of Thermal Processing by Spray Drying on Key Ginger Compounds