References: COPD
https://pubmed.ncbi.nlm.nih.gov/32156131/
https://pubmed.ncbi.nlm.nih.gov/37163005/
https://pubmed.ncbi.nlm.nih.gov/12080403/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2665788/
https://pubmed.ncbi.nlm.nih.gov/31208151/
https://nutritionfacts.org/video/preventing-copd-with-diet/
https://nutritionfacts.org/video/how-much-vitamin-d-should-you-take/
https://pubmed.ncbi.nlm.nih.gov/10525562/
https://nutritionfacts.org/video/treating-copd-with-diet/
https://pubmed.ncbi.nlm.nih.gov/32607110/
https://journals.sagepub.com/doi/full/10.1177/1479972311430335
https://www.nhs.uk/conditions/chronic-obstructive-pulmonary-disease-copd/
https://onlinelibrary.wiley.com/doi/pdf/10.1111/resp.13224
https://www.mdpi.com/1660-4601/17/1/22
https://pubmed.ncbi.nlm.nih.gov/34726628/
https://pubmed.ncbi.nlm.nih.gov/18019972/
https://pubmed.ncbi.nlm.nih.gov/36618788/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3937102/pdf/copd-9-239.pdf
https://pubmed.ncbi.nlm.nih.gov/37163005/
https://pubmed.ncbi.nlm.nih.gov/12080403/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2665788/
https://pubmed.ncbi.nlm.nih.gov/31208151/
https://nutritionfacts.org/video/preventing-copd-with-diet/
https://nutritionfacts.org/video/how-much-vitamin-d-should-you-take/
https://pubmed.ncbi.nlm.nih.gov/10525562/
https://nutritionfacts.org/video/treating-copd-with-diet/
https://pubmed.ncbi.nlm.nih.gov/32607110/
https://journals.sagepub.com/doi/full/10.1177/1479972311430335
https://www.nhs.uk/conditions/chronic-obstructive-pulmonary-disease-copd/
https://onlinelibrary.wiley.com/doi/pdf/10.1111/resp.13224
https://www.mdpi.com/1660-4601/17/1/22
https://pubmed.ncbi.nlm.nih.gov/34726628/
https://pubmed.ncbi.nlm.nih.gov/18019972/
https://pubmed.ncbi.nlm.nih.gov/36618788/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3937102/pdf/copd-9-239.pdf