I have been on Singular for 3 years, the Dr prescribed this for ...

I had sinus for years and as a child. I finally took Raw Adrenal Extract & Raw Thyroid Extract (Enzymatic Therapy or other brand) and it gave my Adrenal glands a boost. My allergies, sinus disappeared!!! Almost permanently. Take only in the morning, don't combine with any other adrenal affecting supplements like Melatonin or Pregnenolone, and it works just great. Go thru 1 bottle only when needed once or twice a year. You don't need it regularly.

Another reason for sinus issues, is your digestive tract. Take cultured non-fat yoghurt regularly and some pro-biotics like acidophilus, lactobacillus, to put friendly bacteria back in your intestinal tract. Also some digestive enzymes after meals to aid in proper food breakdown, like Pineapple & Papaya Extract. This eliminates sinus issues. Stay away from milk, cream and cheese which form mucous.