If you need eye drops for dry eyes â known as artificial tears â choose a brand without the preservative benzalkonium chloride, which can cause irritation, says Andrew Lotery, professor of ophthalmology at the University of Southampton. âYou tend to find it in eye drops that come in bottles,â he says.
Endorphins are natural opium-like hormones that are produced by the pituitary gland and the hypothalamus of your body. Endorphins act on your brain's opiate receptors to block their ability to receive pain messages from the sensory nerves. This makes you less sensitive to pain. Endorphins also work on your emotions.
When you exercise, your body releases chemicals called endorphins. These endorphins interact with the receptors in your brain that reduce your perception of pain. Endorphins also trigger a positive feeling in the body, similar to that of morphine.For example, the feeling that follows a run or workout is often described as euphoric.. That feeling, known as a runner's high, can be accompanied by a positive and energizing outlook on life.owever, unlike with morphine, the activation of these receptors by the body's endorphins does not lead to addiction or dependence. Regular exercise has been proven to: 1  Reduce stress. 2  Ward off anxiety and feelings of depression. 3  Boost self-esteem.