Vitamin D supplements may improve exercise performance and lower the risk of heart disease. Researchers say that vitamin D can block the action of an enzyme called 11-ßHSD1, which assists in making the stress hormone cortisol. Elevated levels of this hormone can increase blood pressure by restricting the arteries, narrowing blood vessels, and encouraging the…

Just a few bad habits can affect sleep quality. The National Sleep Foundation lists the following sleep-stealing practices you should avoid: consuming caffeine within six hours before bedtime; drinking alcohol or eating a large meal or snack before bed; insufficient exercise; having a TV or other technology in the bedroom; and sleeping late during weekends.…

A new study has found a link between breast-feeding and a reduced risk for an aggressive form of breast cancer called hormone-receptor-negative breast cancer. The international study found that women who breast-fed were up to 20% less likely to develop hormone-receptor-negative breast cancer when compared to those who did not breast-feed. The researchers write, “The…

Early exposure to dogs may reduce the risk of asthma in children. A new study found children in homes with a family dog during their first year of life had a 13% lower risk of asthma by the time they were old enough for school. The researchers speculate early exposure to a wider variety of…

Using data collected from 18 published studies, researchers note there appears to be an association between vitamin D status and the intensity of symptoms in patients with chronic obstructive pulmonary disease (COPD). They suggest increasing serum levels of vitamin D through supplementation may reduce the severity of the disease. International Journal of Chronic Obstructive Pulmonary…

Even if you’re not an athlete, knowing your heart rate can help you keep tabs on your fitness level. A normal resting heart rate for adults ranges from 60 to 100 beats a minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. American Heart Association, October 2015

A new study shows that wearing a bicycle helmet significantly reduces the risk of serious brain injury and death in the event of a collision. A medical record analysis of more than 6,200 people who suffered a brain injury in a cycling crash revealed that those who wore a bike helmet were 58% less likely…

The later a teenager or young adult goes to bed during weekdays, the more likely they are to gain weight over time. Researchers analyzed data of 3,342 teens and young adults and found that the later an individual’s bedtime, the more weight they were likely to gain over a five-year period. Lead author Dr. Lauren…

When your thyroid doesn’t produce enough hormone, it can lead to a condition known as hypothyroidism. Symptoms of hypothyroidism include feeling tired, being sensitive to cold, developing a hoarse voice and slowed speech, a decrease in pulse rate, developing coarse scaly skin and thicker hair, numbness in the hands and fingers, constipation, weight gain, headaches,…

Women who are deficient in vitamin D may be up to 6.7 times more likely to develop age-related macular degeneration (AMD) than women without who have healthy vitamin D levels. AMD is the leading cause of legal blindness, and it affects more than ten million Americans. The study’s lead author, Dr. Amy Millen writes, “Most…