• The Earth revolves around the Sun.

• The speed of light is a constant.

• Apples fall to earth because of gravity.

• Elevated blood sugar is linked to diabetes.

• Elevated uric acid is linked to gout.

• Elevated homocysteine is linked to heart disease.

• Elevated homocysteine is linked to B-12 deficiency, so doctors should test homocysteine levels to see whether the patient needs vitamins.

ACTUALLY, I can't make that last statement. A corporation has patented that fact, and demands a royalty for its use.