Ready In. 30 m. Melt the butter or margarine in a large skillet over medium-high heat. Add the garlic and asparagus spears; cover and cook for 10 minutes, stirring occasionally, or until asparagus is tender. If you like your asparagus well done, reduce heat and cook an additional 10 minutes.
Another possible cause of low blood oxygen saturation is anemia, which occurs when the red blood cells don't have adequate hemoglobin, an iron-rich protein that acts as the oxygen carrier, according to the National Anemia Action Council. Anemia has many causes.
A. 1  Many things can cause low oxygen levels in the blood. To name a few: Lung injury (collapsed lung); lung disease (COPD, lung cancer); pulmonary embolism; heart disease (congestive heart failure); anemias -- and that's just a handful I can think of off the top of my head. 2  lack of oxygen in the artery blood.