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Tea and Sleep

Last Updated: Mar. 22, 2017

There is evidence that tea has sleep benefits, especially when compared to coffee. Herbal teas have diverse effects on sleep.

Tea, Bone Density, and Osteoporosis

Last Updated: Nov. 11, 2016

Drinking tea has no negative effect on bone density and may protect against osteoporosis through a variety of mechanisms.

Tea and Acid Reflux

Last Updated: Oct. 24, 2016

In spite of some doctors' recommendations to avoid tea, there is no evidence that tea causes or aggravates acid reflux.

Aluminum in Tea and Its Health Effects

Last Updated: Oct. 19, 2016

Tea has high aluminum levels, but in spite of this, there is no evidence that moderate tea consumption poses any health risks associated with aluminum.

Tea and Iron Absorption

Last Updated: Dec. 21, 2015

Tea is known to inhibit iron absorption, but this effect is not a matter of concern for normal, healthy adults.

White Tea and Caffeine - Myths and Reality

Last Updated: Aug. 26, 2015

Tea companies have promoted myths that white tea is lower in caffeine than other types of tea; this article provides accurate info.

Calories in Tea - With and Without Milk or Sugar

Last Updated: Jul. 27, 2015

Tea is nearly calorie free, but adding sugar or milk can add significant calories to a cup of tea. This page explores how many calories milk and sugar add.

Tannins in Tea

Last Updated: Jul. 23, 2015

Tannins are a class of compounds occurring in black tea and responsible for bitterness, astringency, dark color, and antioxidant activity of these teas.

Acidity of Tea

Last Updated: Apr. 3, 2015

Tea is mildly acidic, much less so than many common drinks; this article explores the question of how acidic tea is and what effects this has on the body.

Bottled Tea

Last Updated: Mar. 17, 2015

RateTea does not list bottled teas, but we do refer people to companies selling unsweetened bottled iced tea.

Tea and Weight Loss

Last Updated: Feb. 3, 2015

Scientific evidence for tea as an aid to weight loss, with discussion of companies that market tea as a weight-loss product.

Vitamin C Content of Tea

Last Updated: Nov. 6, 2014

Green teas tend to contain small amounts of vitamin C, whereas black teas tend to contain none. Processing and storage can reduce Vitamin C content.

Caffeine Content of Tea

Last Updated: Mar. 30, 2014

How much caffeine is in black, green, or white tea? Learn what determines the caffeine content of different teas, which teas are high and low in caffeine.

Health Benefits of Tea

Last Updated: Mar. 24, 2014

A brief overview of the health benefits of tea, and exploration of whether certain teas are better for you than others.

Astringency in Tea

Last Updated: Jan. 13, 2014

Astringency refers to a dry or puckery sensation on the palate; some astringency imparts body and a refreshing quality to tea, but too much is unpleasant.

Caffeine and Dehydration

Last Updated: Oct. 31, 2013

Caffeine in tea and coffee is often claimed to be a diuretic, leading to dehydration, but research does not back up this view.

Tea and Pregnancy

Last Updated: Oct. 31, 2013

This article summarizes the potential risks and benefits associated with drinking tea or herbal tea during pregnancy.

Caffeine Addiction, Dependency, and Withdrawal

Last Updated: Mar. 5, 2012

Caffeine is mildly addictive and causes a physical dependency; caffeine withdrawal can be inconvenient and unpleasant, but tends to only last a few days.

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