1) Thiamin
Sometimes memory loss is the result of a thiamine deficiency.  If this is the case with your memory loss, then you'll find that pistachio nuts are a great natural remedy.  Because they're a rich source of thiamine (.54 milligrams are found in about a half cup of the nuts), they are a wonderfully effective natural remedy for memory loss.

Gotu Kola

2) Lecithin Natural Remedy for Memory Loss
Lecithin is recognized as the national Academy of science as an essential nutrient and it is an excellent source of choline. It is very much involved in the metabolism of the brain so it is a very good supplement that you can take as part of an overall program to prevent memory loss. Take a 1200 mg capsule each day.
 
3) Gotu Kola
The herb gotu kola has been used for centuries as a traditional Chinese remedy for enhancing memory.

4) Acetyl-l-carnitine
ALC is important for metabolism in the brain and there have been many clinical studies regarding this. The most significant application for this supplement is for good health in the brain. Take 500 to 1000 mg each day to enhance learning, good memory, cognition, sound asleep, clear thinking, nerve transmission and other benefits derived from protecting the brain and nervous system.

5) Pregnenalone
This is the most important brain and nervous system hormone yet few people know about it. The small amount of research we have on this is quite impressive. Pregnenalone is important for clear thought, cognition and memory and the quantity in the body begins to drop after the age of 40 but then levels out. Women can take 25 mg and most men do better with 50 mg. Before taking, you should test for this hormone by getting an online saliva test kit that you send off to a laboratory.  If your levels are low, then definitely take this supplement.