When you travel to high altitudes, the air pressure is lower, meaning fewer oxygen molecules are present in the air.

Platelets are cell fragments made by bone marrow that help the blood clot to prevent bleeding and help wounds to heal. While high platelet count can be due to underlying infection, it may also be a sign of a serious bone marrow disorder such as thrombocythemia or primary thrombocytosis, according to the Mayo Clinic.

Poor circulation in the legs can be caused by numerous conditions, such as atherosclerosis, trauma, infection and varicose veins.

Gatorade is a blend of electrolytes and carbohydrates designed to protect you from dehydration. Gatorade was created in an effort to help the Florida Gators reduce heat exhaustion and illness on the field.

Blood donation is one of the most important ways to share your good health with others. Each unit of blood you donate can help up to 3 people in need of blood or blood products.

Whether you have diabetes or watch your blood sugars to maintain more stable energy levels, you know that some foods can raise your blood sugars more than others. Protein in meat, poultry and fish and fats found in oils and butter have little influence over your blood sugars.

Even if you do not have diabetes, you can experience drops and spikes in blood sugar levels for many reasons. If your blood sugar level gets too high or too low, you might develop many symptoms and/or health problems.

Peripheral vascular disease, which is characterized by poor circulation, most often affects the lower extremities. Elevating your legs to an appropriate height can help relieve some of the discomfort in your legs, ankles and feet caused by poor circulation.

Almost all the calcium in your body -- more than 99 percent -- is stored in your bones. Although the calcium circulating in your blood comprises less than 1 percent of your total body calcium, maintaining appropriate levels is vital for bone health and normal muscle and nerve function.

For better heart health, the American Heart Association recommends consuming fish at least twice per week. You may be wondering if this is true for all fish or if you should limit fish that are high in cholesterol and fat. The truth is, when compared with meat, fish is relatively low in cholesterol.

Thick blood, hypercoagulability, is a condition where your blood is thicker and sticker than normal and is due to an abnormality in the blood clotting process.

Your doctor may have prescribed a fasting blood test to reveal your health status or risk factors for disease. If you’re not used to fasting, this seemingly simple requirement can raise many questions about what you can and can’t eat, drink or ingest.