Dr. John Paul Greving DO

What is a vaccine?Vaccines are products that enable a person to develop immunity against certain diseases. A vaccine can be given through needle injections, by aerosol, or by mouth. The polio vaccine is given in the form of mouth drops that contain live but weakened organisms. The vaccine gets into...

Almost every cell in the body has a primary source of energy, which is usually glucose. However, when the body doesn't have enough glucose, the liver responds by producing chemicals known as ketones, converting stored fatty acids into ketone bodies. Ketones are used as a backup fuel source when...

IntroductionWhen people say salt, they usually mean the common table salt. Salt is a mineral that is mainly composed of sodium chloride (NaCl). To distinguish table salt from a class of chemical compounds called salts, the terms rock salt or the mineral name halite is used. Sodium is also...

Magnesium plays a very important role in the smooth functioning of body processes. It has been observed that a deficiency in magnesium is considered to be one of the leading nutrient deficiencies among adults. In such cases, it is often a good idea to take magnesium supplements along with eating...

Creatine, the popular chemical among athletes for enhanced performance, can be obtained from any normal diet. This chemical is also manufactured naturally in the body, and it can help create energy from the food an individual consumes. Although it is a popular choice among athletes, there is no...

Ferrous sulfate is an essential mineral and a type of iron used for the treatment of iron deficiency anemia (IDA). When a person lacks iron, symptoms such as tiredness, shortness of breath, and decreased physical performance may be experienced.  Low levels of iron in the body can be treated by...