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      Smart Woman: 5 Signs You Need More Vitamin D

      (Ivanhoe Newswire) - The sun, salmon, tuna, milk, cereal, pork, eggs, and mushrooms are all great sources of vitamin-D, but most Americans are deficient in it. How do you know if you're one of them?

      Muscle weakness is a sign you may be lacking vitamin D. If you don't have the same stamina you had a few years ago, check your "D" level.

      Women lacking in vitamin D are twice as likely to suffer depression, according to the journal of clinical endocrinology,

      Insufficient levels of Vitamin D have also been linked to chronic pain, especially in African-Americans. It also plays a role in heart health. When you don't get enough, your blood pressure can creep up.

      A study in the Journal of Clinical Sleep Medicine reported lower levels of vitamin D were also linked to higher levels of daytime sleepiness.

      If you suffer from these signs, see a doctor because the solution may be in a simple supplement.