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Quinoa is a tremendously healthy whole grain, one of the healthiest. It has more complete protein than any other grain, although it is really a seed. Eating quinoa is a great way to get a dose of B vitamins, iron and potassium. You can use this healthy grain as an alternative to rice.
If you have bought one of the new special peanut butters with extra omega-3s added in order to improve your nutrition, be aware that you've mostly bought a marketing ploy. Though many foods are fortified in a way that makes a real difference nutritionally, the amount of omega-3s added to this special (and expensive) peanut butter is so small that you would have to eat 8 sandwiches' worth (16 tablespoons) to get as much omega-3 as in a four-ounce serving of salmon.
If you are changing your diet to a more healthy one, get rid of the foods that are unhealthy in your kitchen. You may say that you will avoid eating them, but if they are there, you are just tempting yourself. Try donating the food to a local organization that can help someone else.