Green tea, a tea with multiple benefits
Rich in polyphenols and catechins (especially EGCG), green tea is a powerful antioxidant that may help fight free radical damage and premature cell ageing. It may also play a role in cardiovascular health and other conditions. Green tea is also known for its action on the brain and its positive impact on cognitive functions. It is thought to aid concentration while keeping you alert throughout the day. With a calming effect thanks to the presence of L-theanine, it may help manage stress and anxiety.
Does green tea stain teeth? Oral health risks
With good oral hygiene, you have nothing to worry about. Unlike coffee, green tea is not the enemy of your "Colgate" smile.
If we tend to worry about yellow stains on our teeth, it is mainly due to the tannins found in green tea. Tannins can slightly discolour teeth. Regardless of its colour, tea and yellow teeth are linked. However, daily green tea consumption causes little to no staining on teeth, provided of course that you brush your teeth, gums, and interdental spaces regularly with a good toothpaste. Conversely, drinking green tea without brushing properly can indeed contribute to plaque build-up and discolour (yellow) your teeth. To prevent yellow stains, get into the habit of rinsing your mouth after your cup of tea or brushing your teeth after your morning organic green tea. It couldn't be simpler!
The impact of green tea on tooth enamel
Regular consumption of green tea can cause tooth stains, especially when consumed as concentrated teas like matcha. The tannins present in green tea, similar to those in coffee, can yellow tooth enamel over time.
Tips to reduce staining effects
To minimise this effect, it is advisable to drink water after consuming green tea and to opt for organic tea, which is less acidic and contains fewer residues that could potentially harm enamel. Using a straw can also reduce direct contact with teeth.
Impact of green tea on iron absorption
The side effects of green tea are very real. For instance, drinking too much green tea can impact your iron absorption. By paying a little attention day to day, you are unlikely to experience them:
- To avoid the risk of anaemia, do not consume more than 1.5 litres of green tea per day.
- To avoid yellow stains on your teeth, brush thoroughly and you will have no reason to give up green tea.
In short, there is no need to worry: the benefits of green tea still far outweigh its side effects.
Why green tea can reduce iron absorption
Green tea catechins, particularly EGCG, can inhibit the absorption of plant-based iron. This interaction between green tea and iron is well documented, and excessive consumption can lead to a risk of deficiency, especially in people following a vegetarian diet.
How to drink green tea without iron deficiency
To avoid this risk, it is recommended to drink green tea between meals, as this allows for better iron absorption as part of a balanced diet. Studies also suggest that having sources of vitamin C with your meal can offset this effect.
Side effects of caffeine on the body
With its stimulating and mildly diuretic effects, does caffeine also have side effects? As with all good things, excessive caffeine consumption is what can trigger side effects. Caffeine affects everyone differently, and some people are more sensitive to it than others. The effects may therefore vary.
What are the effects of caffeine on the body?
We know that caffeine can disrupt sleep. Consumed after 5 pm, caffeine can cause insomnia.
It can also cause digestive issues. Caffeine is known to stimulate digestion and accelerate colon activity. Consuming it in excessive quantities is therefore not recommended.
And finally, cause anxiety. Caffeine makes people more alert. Excessive consumption can cause nervousness and restlessness.
If a person regularly drinks coffee or other caffeinated beverages, there is a strong chance they may become dependent on its effects.
As with green tea, caffeine consumption should be moderate to avoid unwanted side effects. Good oral hygiene is also recommended to prevent tooth staining if you drink coffee regularly.
Green tea and insomnia: precautions to take
To avoid the unwanted effects of caffeine, especially on sleep, it is recommended to limit green tea consumption towards the end of the day. Matcha, which is rich in caffeine, should also be avoided in the evening to reduce insomnia.
Choosing your green tea wisely
How to choose a quality green tea?
Side effects or not, choose your green tea mindfully. At Kusmi Tea, we take pride in offering you the very best organic green teas. Organically grown and made in Normandy in our Le Havre workshops, Kusmi Tea green teas are crafted with the utmost respect for nature. By the way, flavoured green teas or plain green teas? At Kusmi Tea, the choice is all yours from our wide selection of green teas.
Recommendations for moderate and safe consumption
For safe green tea consumption, it is recommended to limit intake to 3–4 cups a day, choosing high-quality, organic products. By following these precautions, you can enjoy the benefits of green tea while minimising health risks.