Calcium Supplements: What You Need to Know

The following table shows the Recommended Dietary Allowance (RDA) for calcium by age group and gender. Vitamin D promotes calcium absorption and is needed along with calcium to maintain bone density. Many calcium supplements also contain vitamin D.

The Potential Benefits of Vitamin K2 for the Prevention of Age-related Diseases

Although it might not get the same attention as the other fat-soluble vitamins, vitamin K is no less important.

Sodium and Blood Pressure: Conflict of Evidence and Recommendations

For the most part, everyone agrees that people who have hypertension should keep an eye on their sodium intake. However, there is increasing concern that too little sodium consumption for a healthy person may lead to health problems. The 2015 Dietary Guidelines recommend...

The Pros and Cons of Herbalife Shakes

Nutritional shakes, including those marketed for weight loss, have been available for decades. For the most part, their goal is to be a nutritionally-complete, and low-calorie meal replacement. The Herbalife® company, founded in 1980, produces such a powdered shake mix as...

What Percentage of Nutrients Are You Absorbing?

The proportion of nutrients absorbed from the diet and used for normal body functions depends on many factors, including:

Sodium: 1,500 mg of Sodium Really Add Up Fast

The 2015 Dietary Guidelines for Americans recommends that all adults limit their sodium to 2,300 milligrams (mg) per day, but for some people who are 51 years of age and older, or individuals of any age who are African American or who have hypertension, diabetes, or chronic...

Sodium: How Much Do You Know?

The latest Dietary Guidelines for Americans recommends that all individuals limit their sodium to 2,300 milligrams (mg) per day. Test how much you know about the sodium content of your favorite foods with this quiz.


Chief functions Maintenance of normal: Balance and distribution of fluids throughout the body Balance of pH Muscle contraction and relaxation Nerve transmission and function Possible benefits: None other than the essential functions it already performs Deficiency symptoms...