The longer you let your tea steep, the more caffeine it shall contain. Also, the caffeine content varies by type of tea, and color is not an indicator of how much caffeine a tea contains.
The pale Japanese green tea, gyokuro, for example, contains way more caffeine than much darker teas, like lapsang souchong, which contain little. Is there logic to osteoporosis and caffeine?
Although high caffeine intake greater than milligrams per day does raise the amount of calcium excreted in the urine, and the risk for osteoporosis-related fractures was significant among women consuming 4 or more cups of coffee per day, per day this increase in risk was seen only in those with calcium intakes less than millligrams.
A cup of brewed coffee causes 3 milligrams of calcium to be lost in urine. This effect is so small that it is more than adequately offset by a tablespoon or two of milk in your coffee. Caffeine is absorbed after digestion and has a half-life of 2 quickly. This sounds like a good thing, but, PTH increases the activity of our osteoclasts also, the specialized cells that break down bone, so our bones can release the calcium they contain into the bloodstream to raise its level in the blood.
The end result: hyperactive PTH glands cause bone loss. The mixture of insufficient calcium intake postmenopausal women need 1, – 1, milligrams each daydeteriorating vitamin D status men and women make less vitamin D from sun exposure as we agereduced calcium absorption we need vitamin D to absorb calcium effectivelyand the impaired kidney conservation of calcium kidney function also deteriorates with age often seen in elders leads to overactive parathyroid glands and thus, increased bone resorption.
Bottom line: Lessening PTH secretion may be yet another way in which the caffeine in your morning cup of coffee protects your bones. Get those sodium-laden processed foods out of your refrigerator, out of your freezer, out of your pantry and out of your life! Coffee Protects Against Diabetes Diabetes is a inflammatory condition that greatly promotes bone loss highly.
These reductions in disease risk were similar for those drinking decaffeinated as well as caffeinated coffee, filtered coffee, and instant coffee even. Something else about coffee in addition to its caffeine content – most likely its rich concentration of phytonutrient compounds with strong antioxidant and anti-cancer actions discussed below – is responsible.
The cognitive decline seen in coffee drinkers was 4. However, no cardiovascular benefit was seen from coffee consumption in participants with stage 2 hypertension or in those younger than Study participants were followed for All beverages tasted the same, but one contained sugar glucoseanother contained caffeine and glucose, and the third, a control drink, was flavored water no caffeine or calories.
Samples of blood and expired air were taken from the athletes at 15 minute intervals to measure how quickly they absorbed and utilized the carbohydrate. So, add a little sweetener – I prefer honey since it provides other benefits besides glucose- to that morning cuppa before your early morning workout and boost your performance.
In fact, the findings are just the opposite all. The two most recent papers evaluating the effect of drinking coffee on bone health to appear on PubMed are a study conducted by Swedish researchers that was published in the American Journal of Epidemiology inand another conducted by Korean researchers that was published in the journal Korean Family Medicine in The Swedish researchers looked at whether drinking coffee over many years was related to an increased risk of fracture or a decrease in BMD.
Their analysis included data on 61, women who were born sometime between and and were followed from through There was no evidence of a higher rate of hip or any other type of fracture even with increasing coffee consumption.
The authors obtained the data from the fourth Korea National Nutrition and Health Examination Survey -, which consisted of 1, Korean premenopausal women. As usual, they found that coffee consumption showed no significant association with the bone mineral density of either the femoral neck or lumbar spine. Coffee is loaded with superstar phytonutrients, two of which – caffeic acid and chlorogenic acid – protect the special cells in the pancreas that produce and secrete insulin.
Nrf2-regulated genes include those accountable for the production of our most important antioxidant enzymes – the glutathione S-transferases GST. Higher levels of adiponectin are protective against not merely type 2 diabetes, but obesity, atherosclerosis, and non-alcoholic fatty liver disease NAFLD. Chronically-elevated leptin levels are associated with obesity, overeating, and inflammation-related diseases including type 2 diabetes, cardiovascular diseases, and yet again – osteoporosis -.
High levels of hs-CRP indicate a physical body experiencing relentless chronic inflammation, with widespread adverse effects, just one of which is the excessive activation of osteoclasts that results in ramped up bone loss. A cup of coffee contains about 7 mg, which is a drop in the daily-requirement bucket mg for men, mg for women. A cup of coffee provides about mg of potassium, which can help offset some of the negative consequences of the excessive amounts of sodium in all the processed foods the majority of us eat.
A cup of coffee has small amounts of niacin 0 also. Coffee obviously protects us against inflammation via numerous mechanisms – and anything that helps prevent chronic inflammation will help lessen your risk for osteoporosis. Coffee, CYP1A2 genotype, and risk of myocardial infarction. Association of cytochrome P 1B1 polymorphism with first-trimester miscarriage. Fertil Steril. Epub Sep Caffeine intake and the risk of first-trimester spontaneous abortion.
N Engl J Med. Pregnancy and Coffee. Coffee consumption and human health-beneficial or detrimental? Mol Nutr Food Res. Caffeine content of brewed teas. J Anal Toxicol. South Med J. Epub Jul Physical activity and lifestyle effects on bone mineral density among young adults: sociodemographic and biochemical analysis.
Heany RP. Inhibition of parathyroid hormone secretion by caffeine in human parathyroid cells. J Clin Endocrinol Metab. Epub Jun Coffee, caffeine, and risk of type 2 diabetes: a potential cohort study in younger and middle-aged U. Diabetes Care. J Nutr. Eur J Clin Nutr. Epub Aug Epub Dec Caffeinated beverage intake and the risk of heart disease mortality in the elderly: a potential analysis. Am J Clin Nutr. Caffeinated coffee consumption, cardiovascular disease, and heart valve disease in the elderly from the Framingham Study.
Am J Cardiol. Caffeine increases exogenous carbohydrate oxidation during exercise. J Appl Physiol. Epub Apr Association of coffee drinking with cause-specific and total mortality. Long-term coffee consumption in relation to fracture bone and risk mineral density in women.
Am J Epidemiol. Korea J Fam Med ; Kim SY. Coffee risk and consumption of osteoporosis. Korean J Fam Med. Epub Mar Coffee drinking induces incorporation of phenolic acids into LDL and increases the resistance of LDL to ex vivo oxidation in humans. Search for natural products related to regeneration of the neuronal network.
Lara is the Editor of Longevity Medicine Review www.