Gray Hair or Bald Heads

The document discusses the observation that among middle-aged men, it is uncommon to find individuals who are both bald and gray. Typically, a man is either bald without grayness or gray with a full head of hair. If both conditions are present, baldness usually occurs first, potentially indicating premature aging. Interestingly, some young men may experience baldness or grayness without other signs of aging, while some older men may show signs of senility without being bald or gray. Additionally, laboratory studies have shown that animals on synthetic diets often become gray, but their hair color can return to normal with dietary changes.