"You can trace every sickness, every disease, and every ailment to a mineral deficiency.”
https://paulingblog.wordpress.com/2008/10/28/clarifying-three-widespread-quotes/
"Terrain Theory states that the more unhealthy a person is and the more out of balance their body is, the more susceptible the person is to illness, and the sicker they will get when they come into contact with germs or a virus."
https://thefullest.com/2021/03/25/what-is-terrain-theory-and-germ-theory/
"daily intakes of vitamins and minerals by age, gender, and life stage based on the latest Recommended Daily Allowances (RDAs) and Adequate Intakes (AIs), as well as Upper Tolerable Intake Levels (ULs) developed by National Academies of Sciences, Engineering, and Medicine."
https://www.consumerlab.com/rdas/
"Immunology is the study of the immune system and is a very important branch of the medical and biological sciences. The immune system protects us from infection through various lines of defence. If the immune system is not functioning as it should, it can result in disease, such as autoimmunity, allergy and cancer."
https://www.immunology.org/public-information/what-is-immunology
"Eating enough nutrients as part of a varied diet is required for the health and function of all cells, including immune cells. Certain dietary patterns may better prepare the body for microbial attacks and excess inflammation, but it is unlikely that individual foods offer special protection. Each stage of the body’s immune response relies on the presence of many micronutrients. Examples of nutrients that have been identified as critical for the growth and function of immune cells include vitamin C, vitamin D, zinc, selenium, iron, and protein (including the amino acid glutamine)."
https://www.hsph.harvard.edu/nutritionsource/nutrition-and-immunity/
"A balanced nutritional diet may play an essential role in maintaining general wellbeing by controlling chronic infectious diseases. A balanced diet including vitamin A, B, C, D, E, and K, and some micronutrients such as zinc, sodium, potassium, calcium, chloride, and phosphorus may be beneficial in various infectious diseases. This study aimed to discuss and present recent data regarding the role of vitamins and minerals in the treatment of COVID-19. A deficiency of these vitamins and minerals in the plasma concentration may lead to a reduction in the good performance of the immune system"
https://pubmed.ncbi.nlm.nih.gov/34110533/
The supplement Dr. Fauci takes to help keep his immune system healthy
https://www.cnbc.com/2020/09/14/supplements-white-house-advisor-fauci-takes-every-day-to-help-keep-his-immune-system-healthy.html