What is it, that’s so fearful about turning forty? Women often begin having weight problems, undergo mild depression and menstrual irregularities as they turn forty. Most men experience lowered libido, reduced muscle strength, chronic fatigue, and bloated abdomen mainly in their late forties. All these are signs of declining hormone levels and changing metabolism. This aging process can be further accentuated by day-to-day stress. The same diet which worked for you a decade ago would most definitely not work for you after you have crossed forty. As people age, they lose their health and this is reflected in their appearrance.