In the United States, melatonin is available over the counter as a supplement

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Alopecia totalis is an autoimmune disorder that results in complete loss of hair across the human body

Standard annual medical physical examination blood panels typically test only fasting glucose, basic lipids, and liver enzymes, omitting fasting insulin and advanced lipid particles

Standard lipid panels measure the mass of cholesterol rather than the size and quantity of individual lipoprotein particles

Hepatic steatosis can be detected by measuring serum alanine aminotransferase and gamma-glutamyl transferase, or through specialized FibroScan liver imaging

Following Terry Bradshaw's retirement from the NFL, Terry Bradshaw suffered a severe panic attack in Miami that required emergency transport by ambulance

Alpha-glycerylphosphorylcholine enhances central cholinergic neurotransmission and can increase the proportion of rapid eye movement sleep when taken prior to sleep

High-dose caffeine administration antagonizes adenosine receptors to transiently restore physical vigor and elevate mood during severe endurance fatigue

Terry Bradshaw underwent three days of brain testing at Yale University, which showed no evidence of dementia or Alzheimer's disease

Oral creatine monohydrate supplementation at doses of 10 to 20 grams partially mitigates acute cognitive deficits induced by severe sleep deprivation

Creatine monohydrate supplementation increases intracellular water retention within skeletal muscle tissue, enhancing muscular force output

Former Pittsburgh Steelers center Mike Webster died after experiencing severe cognitive decline, during which Mike Webster lived out of cars and under bridges

Terry Bradshaw took a one-year hiatus from performing in Branson, Missouri, to undergo hip replacement surgery

Katherine May became seriously ill while writing Wintering and could not finish working out her job notice period

Prolonged exposure to cold water during endurance swimming can induce severe hypothermia, rhabdomyolysis, and cellulitis

After a doctor in Miami recommended immediate heart surgery following Terry Bradshaw's panic attack, Bradshaw snuck out of a hospital in the middle of the night

Following his escape from a Miami hospital, Terry Bradshaw flew to a Fort Worth hospital where angiogram tests showed no arterial blockages

Tim Noakes formulated the central governor theory proposing that the brain regulates exercise performance to prevent catastrophic physiological failure

Terry Bradshaw's Merkel cell carcinoma tumor was discovered during an MRI conducted at Yale University to investigate persistent neck spasms

Terry Bradshaw underwent immunotherapy to treat his diagnosis of bladder cancer

The NFL introduced rules to protect players from head injuries in the late 1980s and 1990s following concussions and player deaths linked to chronic traumatic encephalopathy