14 Signs That Indicate You Have A Nutritional Deficiency

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678404/

https://www.mayoclinic.org/diseases-conditions/iron-deficiency-anemia/symptoms-causes/syc-20355034

https://www.nhs.uk/conditions/vitamin-b12-or-folate-deficiency-anaemia/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3509882/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3665020/

https://www.ncbi.nlm.nih.gov/books/NBK448065/