Brief Answer:
Please see the description below.

Detailed Answer:
Hello there,
I am Dr.Senduran,General physician hope to answer your query.
Yes,Each of the food groups definitely got its own benefits. But in everday's diet,It is advisable to include in a balanced form
1) whole grains(Brown rice,oats,quinoa,whole wheat flour etc)
2)fruits(2 to 3 serving a day),
3)Fresh vegetables(especially include greens and green leafy vegetables twice or thrice a week )
4)proteins in the form of poultry meat,legumes,soya bean,cereal sprouts etc
5)dairy products(like yoghurt,low to moderate fat milk etc)

Try to avoid deep fried food items,limit saturated fatty /cholesterol containing foods and lead a healthy lifestyle.The food groups above said would definitely aid in improving overall mental and physical health.Hope this helps .If any clarifications,happy to answer you.Take care.Wish you good health.

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