For those who want to know a bit more about food, they might find this interesting.

Food for Thought

A course that offers a scientific framework for understanding food and its impact on health and society from past to present.

About this Course

Eating and understanding the nuances of food has become a complicated and often confusing experience. Virtually every day brings news about some “miracle food” that we should be consuming or some "poison" we should be avoiding. One day it's tomatoes to prevent cancer, then flaxseed against heart disease or soybeans for menopause. At the same time we may be warned about trans fats, genetically modified foods, aspartame or MSG. Dietary supplements may be touted as the key to health or a factor in morbidity. According to some, dairy products are indispensable while others urge us to avoid them. The same goes for meat, wheat and soy; the list goes on. This course will shed light on the molecules that constitute our macro and micro nutrients and will attempt to clarify a number of the food issues using the best science available. Other topics to be presented will include the diet-cancer relationship, the link between diet and cardiovascular disease, food-borne illnesses, food additives and weight control.

https://www.edx.org/course/mcgillx/mcgillx-chem181x-food-thought-1213

Additional what is good for one person might not be good for another person.

There was once a study that Eskimos can live from fat and meat alone, require only a 7 mg Vitamin C per day.

While Africans need 200 mg per day...with Europeans somewhere between with 70-100 mg.

Just because the body adjusted to what is available.

Surely the difference between people is much bigger and some have difficulties to resorb some nutritions and need to eat a lot more.

There are men who are naturally 1.70 heigh and 60 kg heavy, while others are 1.90 with 95 kg and heavy muscles, it is obvious that they have a complete different need of food. Not only in quantity also in quality.

The most important thing is to learn to listen to your body....Most things are regulated....if you get an urge for steak you need the protein, if you get an urge for sour you may need some Vitamins (and not some artificial sour sweets, the body knows from millions of years evolution that sour fruits are a source for Vitamin C).

The second thing is common sense.....artificial things might either not matter or be harmful....but they aren't good, so just don't eat trans fat, artificial sweetener, color, etc etc