Uh, I don’t know where to begin. This is like, the entire field of nutrition.
Vitamin D does not need to be obtained from the diet, it is primarily produced in the skin (from cholesterol, which you don’t need to eat; your liver produces all you need from any food) after sun exposure. The amount of sun exposure required depends on the time of year, time of day, cloud cover, and amount of skin exposed. VitD can be obtained in the diet but pretty much only from fish and food that has been supplemented. I assume you are now taking high-dose supplements, because the amount in a typical multivitamin isn’t enough.
That said, fatigue is associated with iron deficiency, and if you menstruate there is a ~25% chance you aren’t eating enough to have optimum levels—look into a blood test. (If you don’t menstruate, you’re probably fine, but a blood test can’t hurt).
I am like 2 months away from having an undergraduate degree in nutrition, and I’m studying in Australia, so I recommend this website to you: https://www.nrv.gov.au/
It outlines all the nutrients (from carbohydrates/protein/fat to the vitamins and minerals) and gives the recommended dietary intakes for each. It describes the scientific basis for each, with citations.
EDIT: Thinking about it a bit, is the question you actually meant to ask “what are common nutritional deficiencies that I might not know about”? That depends on many things, but Vitamin D would be #1 on my list.
Uh, I don’t know where to begin. This is like, the entire field of nutrition.
Vitamin D does not need to be obtained from the diet, it is primarily produced in the skin (from cholesterol, which you don’t need to eat; your liver produces all you need from any food) after sun exposure. The amount of sun exposure required depends on the time of year, time of day, cloud cover, and amount of skin exposed. VitD can be obtained in the diet but pretty much only from fish and food that has been supplemented. I assume you are now taking high-dose supplements, because the amount in a typical multivitamin isn’t enough.
That said, fatigue is associated with iron deficiency, and if you menstruate there is a ~25% chance you aren’t eating enough to have optimum levels—look into a blood test. (If you don’t menstruate, you’re probably fine, but a blood test can’t hurt).
I am like 2 months away from having an undergraduate degree in nutrition, and I’m studying in Australia, so I recommend this website to you: https://www.nrv.gov.au/
It outlines all the nutrients (from carbohydrates/protein/fat to the vitamins and minerals) and gives the recommended dietary intakes for each. It describes the scientific basis for each, with citations.
This is a calculator you can use to get a ‘personalised’ recommendation for each nutrient: https://www.nrv.gov.au/nutrients-energy-calc
EDIT: Thinking about it a bit, is the question you actually meant to ask “what are common nutritional deficiencies that I might not know about”? That depends on many things, but Vitamin D would be #1 on my list.