I.N.G.W.E.R. – Instrumental Analysis of Nutritional Ginger Wellness Extracts & Residues

What Gives Ginger Its Characteristic Kick?

Fresh ginger is bright, aromatic, and sharply spicy, while dried or heated ginger develops a warmer and more intense character. Behind these sensory differences lies a group of bioactive compounds known as gingerols and shogaols. In this study, HPLC was used to compare their presence in fresh ginger, ginger tea, and several commercially available ginger shots.

Gingerols and Shogaols: The Chemistry Behind Ginger

Ginger (Zingiber officinale) is widely valued both as a food ingredient and for its bioactive constituents. Among these, [6]-gingerol is the predominant and most extensively studied pungent compound in fresh ginger. Smaller amounts of [8]-gingerol and [10]-gingerol are also naturally present.

Processing changes this chemical profile. When ginger is heated or dried, gingerols can undergo dehydration and form a related group of compounds known as shogaols. One of these, [6]-shogaol, is associated with strong antioxidant activity and has also been investigated for its anti-inflammatory properties.

KNAUER: Figure 1: Structure of [6]-gingerol (drawn with MarvinSketch 6.0.1)

Why Is Ginger So Popular?

Ginger is commonly associated with digestive support and is frequently used to help alleviate nausea, including motion sickness and mild gastrointestinal discomfort. Its constituents have also been studied in connection with inflammatory processes, muscle and joint discomfort, and broader physiological effects.

The chemical composition of ginger products, however, can vary considerably depending on the raw material, formulation, processing conditions, and extraction method. This makes instrumental analysis useful for examining what different ginger products actually contain.

KNAUER: Figure 2: Ginger picture generated with DALL-E (OpenAI; GPT-4o)

Figure 2: Image generated with DALL-E (OpenAI; GPT-4o)

“And I had but one penny in the world, thou shouldst have it to buy gingerbread.”
– William Shakespeare, Love’s Labour’s Lost

Taking a Closer Look at I.N.G.W.E.R.

The study compared several commercial ginger shots with fresh ginger root and ginger tea.

The liquid ginger products were first centrifuged and the supernatant removed. The remaining solid material was extracted with methanol/water 50:50 (v/v) and centrifuged again. The resulting extract was passed through a 0.22 µm nylon syringe filter before injection into the HPLC system.

Chromatographic separation was performed under reversed-phase conditions using a KNAUER Eurospher II C18H column:

• Column dimensions: 150 × 3 mm
• Particle size: 3 µm
• Order number: 15CE185E2G
• Flow rate: 0.8 mL/min

The gingerol concentration was not determined quantitatively. Instead, chromatographic signal heights were compared with those obtained from freshly extracted ginger root. Direct comparison between commercial products also needs to take into account that the individual shots contained different proportions of ginger.

KNAUER: Table 1 Percentage of ginger in shot samples according to their list of ingredients

Ginger Content of the Tested Shots

Fresh Ginger and Ginger Tea

KNAUER: Left: Chromatogram of fresh ginger root, 5 g sample was extracted with MeOH:H₂O; 1 – [6]-gingerol, 2 – [8]-gingerol, 3 – [10]-gingerol. Right: Chromatogram of YogiTea ginger lemon, tea bag (1.8 g) was extracted with 200 ml hot water; 1 – [6]-gingerol

Fresh ginger provided the clearest representation of the characteristic gingerols. In contrast, only a small [6]-gingerol signal was observed in the tea extract. One important difference is that the tea was prepared using hot water rather than the methanol/water extraction applied to the other samples.

Classic and Pomegranate Ginger Shots

KNAUER: Left: Chromatogram of classic ginger shot, 1 - [6]-gingerol, 2 - [8]-gingerol, 3 - [6]-shogaol, 4 - [10]-gingerol. Right: Chromatogram of pomegranate ginger shot, 1 - [6]-gingerol, 2 - [8]-gingerol, 3 - [6]-shogaol, 4 - [10]-gingerol

Both products showed a comparatively rich ginger-derived profile. In addition to [6]-gingerol, the chromatograms contained [8]-gingerol, [10]-gingerol, and [6]-shogaol.

Among the commercial products examined, the classic and pomegranate shots showed the strongest [6]-gingerol signals.

Turmeric and Fruit Shots

KNAUER: Left: Chromatogram of Kurkuma ginger shot, 1 - [6]-gingerol. Right: Chromatogram of fruit shot, 1 - [6]-gingerol

In these two samples, [6]-gingerol was the principal ginger-related compound identified. The fruit shot produced the lowest [6]-gingerol signal of all the tested ginger shots, which is consistent with its comparatively low declared ginger content of 2%.

Vitamin Acai and Pineapple Ginger Shots

KNAUER: Left: Chromatogram of Vitamin Acai shot, 1 - [6]-gingerol, 2 - [8]-gingerol, 3 - [6]-shogaol, 4 - [10]-gingerol. Right: Chromatogram of pineapple ginger shot, 1 - [6]-gingerol, 2 - [8]-gingerol, 3 - [6]-shogaol, 4 - [10]-gingerol

The Vitamin Acai and pineapple products showed a broader profile similar to the classic and pomegranate shots. [6]-gingerol, [8]-gingerol, [10]-gingerol, and [6]-shogaol were detected in both samples.

What Did the HPLC Analysis Reveal?

[6]-Gingerol was detected in every sample analyzed. The freshly extracted ginger root gave the strongest reference response, while among the commercial ginger shots, the classic and pomegranate variants showed the highest [6]-gingerol signals.

The fruit shot contained the lowest amount based on relative signal height, while the hot-water ginger tea extract produced only a small gingerol response.

A broader range of ginger-derived compounds was observed in the classic, pomegranate, pineapple, and Vitamin Acai shots, where [8]-gingerol, [10]-gingerol, and [6]-shogaol were detected alongside [6]-gingerol.

Because the experiment was designed as a comparative rather than quantitative analysis, the results should be interpreted as differences in chromatographic response rather than absolute gingerol concentrations. Nevertheless, the experiment demonstrates how straightforward reversed-phase HPLC can be used to compare the characteristic bioactive compounds present in fresh ginger and processed ginger products.

Whether fresh, brewed, or packed into a concentrated shot, ginger clearly offers more analytical complexity than its distinctive spicy taste might suggest.

Download application note I.N.G.W.E.R. – Instrumental Analysis of Nutritional Ginger Wellness Extracts here