My sister was a non-smoker, but her husband smoked. My dad smoked for 20 years and quit and 30 years later he died of lung cancer. COPD is a debilitating disease and drastic measures should be taken.
Mercola felt if you want to live an extra 20 years you should take 6000 mg of Vitamin C. 1000 minimum I think, but 3000 is optimum. Make sure the Vitamin C as so sweetener in it. I just hate these companies who put sweeteners in their supplements.
I am a black seed expert and I feel very strongly that all disease can be treated with the use of black seed or nigella sativa oil. I would suggest that also.
I would also have her checked for Vitamin D. But like I said once my sister lost weight she was better. I so wish your mom good health.