Muscle Cramps
If you have frequent muscle cramps, your first order of business is to make them stop. Cramps during or after exercise, or at night, are a sign of a major magnesium deficit.

To end most night-time or post-exercise cramps, take 3 slow-release magnesium tablets daily for 20 days. Most people's cramps cease within 2 weeks, but continue the full 20-day course.
When shopping for magnesium, note the type — it determines how well you absorb it. Recent research suggests magnesium glycinate is absorbed best among the 7 varieties.