Actually only when feeling of pressure on sternum start then i feel issue in taking long breath.
Hi I have no idea about the vitamin D factor that may be related to the chest and breathing. ... But I have that feeling very often , especially while bending over at the waist. I also get panic attacks from a stabbing pain that comes from inhaling in between my lungs.,. I have learned to loosen tight clothes , get ice water , and sit down. Relax and do not panic cause must breathe! Hope I helped a bit good luck and just try it! From , Drea
Hello! Sorry I don't know much about this. Please repost in the Vitamin D Forum, and I know someone there will be able to help you. Blessings - Blu