Sprained ankle An ankle sprain is an injury the ligaments in the foot causing pain, tenderness, swelling, and bruising. Blood clot in the legs Blood clots in the leg can become very dangerous, symptoms include swelling, redness, tenderness in the leg.
serine A non-essential amino acid found as a component of most proteins. It is a precursor of choline, glucine, cysteine and pyruvate. Serine is present in most diets but most of the body serine is synthesized.
Serotonin (5-hydroxytryptamine, 5-HT) is a chemical found in the human body. It carries signals along and between nerves - a neurotransmitter. It is mainly found in the brain, bowels and blood platelets. Serotonin is regarded by some researchers as a chemical that is responsible for maintaining mood balance, and that a deficit of serotonin leads to depression.