I read a post about the benefits of Turmeric which may be helpful as a supplement for our condition, I would urge caution and some study before adding some supplements to your daily diet.
For example if you are in stage 3 or 4 Very Severe as I am, you may have associated heart or other Organ conditions such as Heart Arythmmia I discovered after taking Turmeric for some time that along with other factors it was pushing up my heart rate to high 150's also it is a total no if you are taking blood thinning medications such as warfarin and even perhaps aspirin. 500 mg of Turmeric can be considered a high dose.
I would suggest that before adding any high dose supplements which may be suggested to your regime that you google that supplement for side effects and interactions with your condition or check with your GP if it will be safe for you.
I have discovered after living for several decades with very severe COPD/Emphysema that the best supplement for this condition is a sunny outlook and a very positive attitude to living your life as much as you can, and adopting a can do attitude to getting the most out of every day. My COPD penpal over many many years taught me this and she lived until 94 whilst also being on Oxygen for 22 years.
For those who wonder I am on Oxygen 24/7 but I do not allow it to limit me nor shall I ever let this horrible disease rule my life. I have been a member of this site since its original start as the BLF site but do not post too often but read your posts each day.
Best regards to all.