Timing Protocol
What researchers say about when, how and with what to take green tea egcg, and how strong the evidence is.
The verdict on Green Tea EGCG overall
Leaning for
Green tea or EGCG is worth taking.
9 sources: 3 positive, 5 partly, 1 negative
Short answer
Between meals (tannins can inhibit iron absorption); avoid late in the day due to caffeine
One verdict, worked out from every counted mention. One dot is one source: a researcher or a study. Tap a dot to see its receipt.
positive partly neutral negative Each researcher and each study counts once per claim, however often they come up.
Drinking green tea with meals reduces iron absorption.
2 sources: 2 positive. Fewer than 3 sources so far.
Researchers say
No researcher counted yet.
Studies show
2 positive
2 papers we read
Other primary study, Am J Clin Nutr, 2001, PMID 11237939
Positive Study
Read the paper on PubMed →Mean (+/-SD) iron absorption decreased from 12.1 +/- 4.5% to 8.9 +/- 5.2% (P < 0.01) in the presence of green tea extract and from 7.5 +/- 4.0% to 6.4 +/- 4.7% (P < 0.05) in the presence of rosemary extract.
Other primary study, J Nutr, 2021, PMID 34038558
Positive Study
Read the paper on PubMed →Tea consumption reduced iron absorption from NaFeEDTA by >85% in both IDA and nonanemic women.
Other primary study, Am J Clin Nutr, 2001, PMID 11237939 Study · positive
Mean (+/-SD) iron absorption decreased from 12.1 +/- 4.5% to 8.9 +/- 5.2% (P < 0.01) in the presence of green tea extract and from 7.5 +/- 4.0% to 6.4 +/- 4.7% (P < 0.05) in the presence of rosemary extract.
Other primary study, J Nutr, 2021, PMID 34038558 Study · positive
Tea consumption reduced iron absorption from NaFeEDTA by >85% in both IDA and nonanemic women.
Built from every credited researcher and cited study on each claim.
Green tea or EGCG is worth taking.
Researchers
Dr. William Li, on The Dr. Hyman Show, at 13:18
Positive Video · Opinion
Open the tape at 13:18 →“the kakin and tea have a range of benefits to our body's hardwired Health defense system”
Kara Fitzgerald, on The Dr. Hyman Show, at 1:00:47
Positive Video · Opinion
Open the tape at 1:00:47 →“have some green tea have some curcumin all of those polyphenols you know and love they are important”
Studies
Other primary study, Eur J Epidemiol, 2019, PMID 31392470
Positive Study
Read the paper on PubMed →Higher consumption of green tea is associated with lower risk for all-cause mortality in Japanese, especially for heart and cerebrovascular disease.
Other primary study, JAMA, 2006, PMID 16968850
Partly Study
Read the paper on PubMed →Green tea consumption was inversely associated with mortality due to all causes and due to cardiovascular disease.
Pooled analysis, Cochrane Database Syst Rev, 2013, PMID 23780706
Partly Study
Read the paper on PubMed →The limited evidence suggests that tea has favourable effects on CVD risk factors, but due to the small number of trials contributing to each analysis the results should be treated with some caution and further high quality trials with longer‐term follow‐up are needed to confirm this.
Pooled analysis, Sci Rep, 2014, PMID 25176280
Partly Study
Read the paper on PubMed →The meta-analysis suggested that green tea consumption had a favorable effect on decrease of BP.
Pooled analysis, Cochrane Database Syst Rev, 2020, PMID 32118296
Partly Study
Read the paper on PubMed →Overall, findings from experimental and nonexperimental epidemiological studies yielded inconsistent results, thus providing limited evidence for the beneficial effect of green tea consumption on the overall risk of cancer or on specific cancer sites.
Pooled analysis, Nutr J, 2020, PMID 32434539
Partly Study
Read the paper on PubMed →Collectively, consumption of green tea lowers LDL cholesterol and TC, but not HDL cholesterol or triglycerides in both normal weight subjects and those who were overweight/obese; however, additional well-designed studies that include more diverse populations and longer duration are warranted.
Pooled analysis, Cochrane Database Syst Rev, 2012, PMID 23235664
Negative Study
Read the paper on PubMed →Because the amount of weight loss is small, it is not likely to be clinically important.
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Theanine
30-60 minutes before bed for sleep; or with caffeine for ...
Caffeine
Delay intake 90-120 minutes after waking, so the natural ...
Resveratrol
Morning with food containing fat for absorption
Curcumin
Take it with food and fat to help absorption. It is taken...
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