Dr. Maya Krista Johnston M.D.

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• Sleep Positioners May Increase a Baby's Risk of Death

  A warning has been issued by the FDA and the Consumer Product Safety Commission (CPSC) against the use of sleep-positioning devices for babies. About 12 deaths have been reported with the use of these devices in the last 13 years.FDA principal deputy commissioner, Joshua Sharfstein, reported that...

• How Does the Body Turn Carbohydrates into Glucose?

  What are Carbohydrates?The body converts the food we eat into energy. Even though we obtain calories and energy from different food sources, such as carbohydrates, fats, and proteins, our main source of energy is still from carbohydrates. The body converts these carbs into glucose, which is the main...

• What's the Difference Between Salt and Sodium?

  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...

• What Causes Blood in Semen?

  What does blood in semen mean?Blood found in urine or stool can be a cause for concern. Similarly, when a man comes across blood in semen, then it can make him anxious. The medical term for blood found in semen is hematospermia or hemospermia. Fortunately, blood in semen does not always indicate a...

• Tdap Vaccine for Whooping Cough

  The Tdap vaccine protects the body from three diseases: tetanus, diphtheria, and whooping cough....

• What Is Cyanosis and Why Does It Occur?

  IntroductionCyanosis is the medical term for a bluish discoloration of the skin, nails, toes, and mucous membranes. It is generally caused by low levels of oxygen in the blood. Normally, blood appears bright red when it is fully oxygenated. However, when blood does not have enough oxygen, it turns...