Je Y et al (73) performed a meta-analysis of 20 cohort studies with over 970,000 participants to examine the association between coffee drinking and mortality. The authors found that more than 2 cups of coffee and up to 9 cups of coffee daily was inversely associated with a lower relative risk of mortality. There was also a weak association of coffee drinking with lower mortality in those who drank 1 to 2 cups per day. There was limited data for drinking decaf coffee but this also showed a lower risk of death.
Don’t consider drinking coffee in order to live longer and increase life expectancy unless you are careful to avoid too much caffeine. Caffeine intake up to 300 mg per day is generally safe for healthy adults. Older patients or those with hypertension, cardiovascular disease, or cerebrovascular disease, avoid more than 1-2 cups of caffeinated beverages per day. Caffeine intake is generally recognized as safe by the FDA and AMA but can be dangerous with adverse effects such as high bp, stroke, and arrythmias reported.
Turmeric Research is Evolving
Turmeric and it’s bioactive extract curcumin has been known to extend lifespan in worms, fruitflies, and mice (74). Turmeric is known to have anti-cancer activity on breast cancer (75), colorectal cancer (76), gastric cancer (77), and pancreatic cancer (78), just to name a few. More research is needed in humans, but many are already taking turmeric in foods and supplements containing black pepper to increase absorption. Research may eventually establish turmeric as a chemopreventive agent for cancer.