When looking at foods that are considered to be function, you have a variety of fruits and vegetables that are eaten for the minerals, vitamins and other nutrients that they contain. You can also look at a lot of whole grains when you are looking for soluble fiber and fish if you want to get omega-3 fatty acids. Berries are also loaded with all sorts of nutrients and many people like to add them to their diet as a health food boost to give them the extra energy that they want to power through the day.
However, if you are not able to get the right amount of nutrition from the foods and drinks that you are consuming, it is crucial that you look to dietary supplements. Food & drinks supplements can be taken in pill form, powder form or even pre-mixed in drinks that you can add into your daily routine. It is just important that you are careful not to take too many supplements as it can cause interactions with prescriptions or even overdose. Simply talk with your physician about some of the supplements that you are thinking about taking to see if they are a good fit for your needs.