Iron – Found in foods such as red meat, beans, and dark leafy vegetables are good sources of iron in the diet.
Water – Studies have shown that dehydration of even less than one percent of body weight can lead to cognitive decline.
Healthy Fats – Omega-3 fats can be found in fish: salmon and sardines, as well as flax and chia seeds, and nuts like walnuts. In addition, many individuals supplement their diets with an Omega 3 supplement
Probiotics Eating a varied diet and fermented foods can help promote healthy gut bacteria, and you can also consider adding a probiotic supplement
Choline – Foods high in choline, such as egg yolks, are excellent nutrition for the brain.
Creatine – Creatine is found in the diet primarily in red meat and other animal protein sources. An average mixed diet can contribute one gram of creatine daily, but many research protocols call for three grams or more, persuading many people to consider supplementing with a creatine monohydrate supplement.
With thanks to Joel Totoro, Thorne RD