Difference Between Green and Black Tea
The difference between green and black tea is all in the processing; they both come from the leaves of the Camellia sinensis shrub which is native to East, South and Southeast Asia…
The leaves for black tea are withered, rolled, oxidized, then dried. Oxidization gives black tea its colour and a stronger flavour, which it can retain for a number of years.
Green tea, on the other hand, is kept as close as possible to its natural state. The picked leaves are quickly heated (to prevent oxidation), rolled, and dried. Because it isn’t oxidized, green tea will normally lose its flavour within a year.
Both teas are rich in vitamins, minerals, and polyphenols but, because it’s processed less, green tea contains higher concentrations of these healthy constituents.
‘Polyphenols’ is the general name given to a range of plant-based molecules, proven to have powerful antioxidant and anti-inflammatory properties. Such plants have been a key element in traditional Chinese and Ayurvedic medicine for very many centuries.
Health Benefits of Green Tea
According to the University of Maryland Medical Center, green tea polyphenols appear to be more potent antioxidants than vitamin C. And several studies have indicated that polyphenols can help in areas such as:
- cardiovascular health
- liver health
- weight loss
- glucose management / diabetes
- brain health / brain function
- a potential to lower the risk of various cancers (but more work needs to be done on this)
And our good friends at Well-beingSecrets.com have listed no less than 30 health benefits of green tea which have been backed-up by scientific studies.
But Does Green Tea Help Gout?
The latest study into the uric acid reducing capability of green tea (extract) concluded that:
“Green tea extract may modestly lower SUA (serum uric acid) level and decreases uric acid clearance. Green tea extract also significantly elevated serum antioxidant capacity with a positive dosage effect. The effect of GTE on SUA in healthy individuals was short term. The effects of GTE on urate handling in patients with hyperuricemia or gout need to be determined.””
We can see that there was a ‘modest’ decrease in blood uric acid. However, the study only looked at healthy individuals without gout, so it doesn’t give any data on the impact of green tea on actual gout patients.
So does taking green tea help gout? Well, the jury’s still out…But, taking into account this and other studies, maybe what we can say is that drinking green tea on a daily basis ‘may’ help to reduce the inflammation and swelling of a gout flare (due to its anti-inflammatory properties), and lower uric acid levels in the blood (albeit marginally).
The good news is that green tea is very low in purines and a cup will only have 2 calories at most. So, it’s a healthy drink to take as part of a well-balanced diet whether you suffer from gout or not.
How to Consume Green Tea Safely
So how much can you safely drink? This is the advice given by the University of Maryland Medical Center:
“Green tea has not been studied in children, so it is not recommended for pediatric use.”
“Depending on the brand, 2 to 3 cups of green tea per day (for a total of 240 to 320 mg polyphenols) or 100 to 750 mg per day of standardized green tea extract is recommended. Caffeine-free products are available and recommended.” (my emphasis)
But they also point out that there are certain people who should avoid drinking green tea or taking green tea extract. These are people with:
- high blood pressure
- kidney problems
- liver problems
- stomach ulcers
- psychological disorders (particularly anxiety)
- pregnant and breastfeeding women
And it doesn’t stop there. As with any herbal remedy there’s the potential for green tea to interact in a negative way with medication. So, if you’re taking any medication whatsoever, consult with your doctor before drinking green tea or taking any green tea products.
What Happens If You Drink Too Much Green Tea?
According to WebMD:
“Drinking too much green tea — more than five cups per day, for example — is POSSIBLY UNSAFE. It can cause side effects because of the caffeine. These side effects can range from mild to serious and include headache, nervousness, sleep problems, vomiting, diarrhea, irritability, irregular heartbeat, tremor, heartburn, dizziness, ringing in the ears, convulsions, and confusion. Green tea seems to reduce the absorption of iron from food. Drinking very high doses of green tea is LIKELY UNSAFE and can actually be fatal. The fatal dose of caffeine in green tea is estimated to be 10-14 grams (150-200 mg per kilogram). Serious toxicity can occur at lower doses.”
As long as you don’t have any of the conditions listed above, and your doctor has cleared you to take green tea, and you restrict yourself to two or three cups per day (preferably caffeine-free), then you should get all the potential health benefits without any nasty side effects.