Beef alone, as a source of iron and other vitamins that are needed especially by men, is critical.
People are now trying to raise children and animals on vegan or keto or gluten-free diets, and I call that cruelty. The effects of malnutrition are subtle and long-term, and so people who go on a fad diet for a while will not notice, and people who routinely eat any sort of junk food and processed food do not notice that they are malnourished yet obese.
My mental health improves by leaps and bounds when I eat a healthy diet: I feel better simply because I'm not abusing my body, I feel satisfaction in preparing wholesome meals with known ingredients in my own kitchen, I enjoy saving money. Moreover, my sleep hygiene improves and my daily schedule approaches something of a productive citizen instead of a listless, lethargic couch potato.
Since I do suffer from chronic mental illness centralized around mood disorders, having a good healthy diet is absolutely essential to my healing and recovery, more than any drug, alongside therapy and regular meditation and practice of my faith in Christ.