Peanuts and peanut butter should not cause a problem of exacerbating congestion or mucus problems unless you are actually allergic to the nut itself. Peanuts are full of beneficial nutrients such as Zinc and Selenium as well as protein which are all important nutrients to build the health of the body.
Remember that variety is the spice of life and the more variation a diet has the lower the risk of possible nutrient deficiencies. Teenagers and young people have a tendency to consume the same foods each day and this habit may contribute to small occurances of malnourishment. Including many foods in one’s diet is the best way to ensure health and vitality, this includes many kinds of fruits and vegetables, grains, proteins, legumes, carbohydrates, oils, fats, nuts and seeds.
It is also possible to choose other types of nut butters such as Macadamia, cashew, brazil or almond. These are great tasting nut butters and a good alternative to peanut butter so your son can increase his variety of food choices.
Organic foods, especially nuts, are most beneficial for health as the produce has been grown in soil without the use of chemicals and pesticides. Due to the high quantity of oil contained in nuts any pesticides or chemicals used are stored in the oil and are therefore found in high amounts. Foods which are not organic can therefore contribute to ill effects on the body, it is therefore the wisest choice to eat mostly organic foods.