Surely you’ve heard it. Tea is healthy for you – especially green tea! We hear it said all the time in our shop and of course we think it is for many reasons. Talking tea and health can be a slippery slope so we tend to avoid it. That said, in this post we are going to add just a tiny bit more to consider with respect to compounds found in tea, what they are thought to help with, and links to sources you may wish to explore.
So here are just a few of those micronutrients:
- Caffeine (of course) – All tea from camellia sinensis (even decaffeinated) has some amount of caffeine in it. Caffeine is a stimulant and helps to wake us up in the morning and get us going. While research on benefits and risks of caffeine are ongoing we can’t deny that caffeine gives us a boost of energy.
- L-theanine – We’ve written about this before ( Is caffeine from tea less jolting? ) but the long and short is there is a good bit of research, which we cite in the blog, around the moderating effect L-theanine has on caffeine in tea. It’s the same caffeine found in any other product but the L-theanine seems to moderate its effects for a more stable alertness. The monks of China and Japan have known this for centuries. ( The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness – PubMed Central )
- Catechins, a Polyphenol (green tea) – A family of compounds found in green tea, primarily EGCG, which are thought to contribute to the significant antioxidant qualities of tea. ( Beneficial Effects of Green Tea: A Literature Review – PubMed Central )
- Thearubigens and Theaflavins, Oxidized Polyphenols (black tea) – As tea leaves are processed into what becomes black tea, the polyphenols themselves are transformed into theaflavins and thearubigens. Both are thought to have strong antioxident properties, like catechins, though in the case of thearubigens it seems a lot more study is needed to really understand these. ( Theaflavins in Black Tea and Catechins in Green Tea Are Equally Effective Antioxidants – Journal of Nutirition and Green tea composition, consumption, and polyphenol chemistry – PubMed Central )
- Tannins, a Polyphenol – Found in both green and black tea, tannins are really very similar to catechins, though not as concentrated. They too are considered to have strong antioxidative qualities and are also what brings out bitterness in tea if its steeped too long. Among other things some research points to possibly being beneficial to dental and oral health. ( Oolong Tea and Health Benefits – Tea Research and Extension Station, Taiwan )
- GABA – Research seems to suggest that GABA (Gamma-aminobutyric Acid) may be beneficial for reducing stress, depression, and enhancing sleep ( Improvement of Antioxidant Defences and Mood Status by Oral GABA Tea Administration in a Mouse Model of Post-Stroke Depression – PubMed Central ). In Japan and Taiwan some tea growers are specifically using a process to produce and market a high GABA tea, though this area likely needs quite a bit more study.
For a nice summary chart on the compounds in green tea, as well as everything you could want to know about Japanese Green Tease have a look at Let’s Enjoy Nihon Cha (Japanese Tea) from the Japan Tea Industry Association.
We eagerly devour scientific, peer reviewed, studies of a statistically meaningful sample size, where tea is part of a healthy lifestyle. That said, our focus has been and remains on learning all we can about tea, where it comes from, the people who make it, the cultures it has impacted, and the trade it has spawned. That’s why we offer a wide variety of teas on our website and in-store. It’s why we offer flights to feed the curiosity of our guests, and we try to keep adding new tea experiences. And finally, it’s why we travel to meet our suppliers and import directly, so that we can offer our customers the best experiences and knowledge to support a healthy tea habit.
In closing we leave you with a quote from Tea and Health: Studies in Humans in PubMed Central:
Large scale well-controlled human clinical trials are necessary to establish the health promoting effects of tea consumption. Only based on these findings, recommendations to human population could be made.
(Note: we have zero medical background so consider these interesting reads but not definitive — talk to your doctor).
Don’t miss the entire series on tea and your health!