Posted on June 28, 2016
Surprisingly, the color of tea can tell us a lot about the potential found within this choice beverage. Tea color benefits are raising awareness in today’s health food industry and many people are flocking to the stores to stock up in hopes of improving their overall health. Hidden within the broad spectrum of tea colors are clues that unlock its nutritional value, and top tea producers are using this evidence to increase the value and marketability of their products. The more we learn about how color impacts quality and nutritional value, the more emphasis is placed instrumental analysis of these color qualities.
Understanding the Color Benefits of Tea
Tea color varies from cup to cup, but when classifying tea varieties there are three basic color varieties: black, green, or red. These distinct color variations help determine flavor, origin, price and specific health benefits, so understanding and classifying these choices accurately plays an important role in tea production.
Black tea varieties are developed when green tea leaves are exposed to highly oxygenated moist air as they undergo the drying process. When leaves turn dark-brown to black in color, caffeine levels rise making this variety a popular alternative for coffee drinkers who are looking for an added boost from their beverage.1 Color technology has also revealed changes in polyphenols levels, the antioxidant powerhouse in black tea, which can then be quantified during processing. As leaves undergo the color-changing process, spectrophotometric analysis can accurately measure the increase in this desirable compound. This is significant, since the added benefit of polyphenols have been linked to the decreased risk in heart disease and cancer. The ability to quantify antioxidant levels contributes to yet another selling point in this variety.
Green teas also boast strong antioxidant power in the form of catechin2, which has been known to support similar immune boosting qualities without the added caffeine. Many studies have also link catechin with an increase in fat-burning ability, making green tea a popular choice as part of weight loss regimens for many individuals. UV-spectrophotometry offers the ability to measure catechin and quantify this powerful antioxidant for dietary supplement use as well.
Red tea is also very high in antioxidants, but is completely caffeine free. Similar to the polyphenol in black teas and catechin in green, red tea boasts quercetin, which is the powerhouse of the group.3 Chock full of antioxidant power, quercetin is known to benefit the heart and circulatory system, reduce the risk for certain types of cancers, and increase the body’s anti-inflammatory defense systems. With a beautiful red hue, pleasing aroma, and pleasant taste, red teas are quickly becoming the preferred blend among tea connoisseurs.
The Importance of Spectral Technology in Tea Color Analysis
Although variations in tea color may appear similar to the naked eye, a closer look can determine a lot about flavor, quality and nutritional value. That is where spectrophotometry steps in to unlock the secrets. Spectral technology can measure changes in absorption and optical density in order to quantify antioxidant levels of various chemical compounds found in tea. This technology has not only opened the door to new health benefit claims in tea beverage varieties, but the extraction of these powerful antioxidants has led to the development of new concentrated dietary supplement use. The ability to measure these compounds has forged a new path in tea production and manufacturing.
Spectrophotometric technology does more than just stretch the boundaries of nutritional science. Many tea industry leaders rely on color analysis for consistency in their commercial brand products as well. Color uniformity plays and important role in marketability and consumer choice. That is why spectral technology is commonly used throughout the many stages of tea production. From raw tea leaf and processing analysis to the color consistency of the final product, spectrophotometers use real-time measurement capabilities in improve color outcomes at every stage of tea development.
Versatility in Color Measurement Tools
When upgrading or introducing new color analysis instrumentation into your production process, one of the most important factors to consider is product versatility. Many of today’s spectrophotometers offer features that are designed for specific industry use, but knowing what options are best for your application can be challenging.
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