Three essential things your body needs are anti oxidents and amino acids and fatty acids to build up your immunity system and fight free radicals that cause disease and aging. Think bright green and red. anti oxidents are found in bright red or green vegetables. When taking anti oxident supplements it is important to take quality brands that have the following active ingredients with NO preservative or chemical additives or sweeteners Amino acids mostly help cells communicate, and improve brain and nerve function.  

Polyphenol --best source green tea --good cancer fighter,

beta sitosterol --best source --good for male problems-cancer

resversotol --best source red grapes --

acai, pomeganates, berries and other red and purple fruits as well as colorful vegetables are the best source of amino acids.

amino acids. They are our bodies building blocks but need replenished by supplements as we age. Some main amino acids are

5HTP --(tryptophan) found in poultry and pasta. good for nerve damage.

L arginine --memory booster

L carnitine --

alpha lipoic acid --for nerve damage and long term memory

essential fatty acids. Studies are showing that ADHD is directly related to the lack of essential fatty oils. Kids who take essential fatty acids are more alert and have better cognitive thinking. Some other things EFA's are good for are heart & circulation, inflammation, skin problems, minimize diabetic nerve damage, PMS, endrometriosis and menstrual cramps. EFA's come in a variety of forms.  

Essential fatty acids

Omega

fish oil

flax seed oil

evening primrose

borage oil

One more thing essential for digestion are enzymes. There main goal is breaking down your foods for digestion. Best sources are Papaya and Pineapple. They can be used as a natural meat tenderizer and enhance flavor to your meat rather than making it have a salty taste.