Ray Peat said:Often I have used older sources, when their results have stood up well, because I want to emphasize the cultural lag which
exists between discovery and professional awareness and application. Unfortunately, some professional half-wits who have never read a scientific paper are able to point at the date of citation and say, "well, now we know better than this." This happens frequently in relation to the information on estrogen and iron, especially, even though many studies have appeared in recent months confirming the older data. The only real solution to this problem is to change our system of education and information distribution. However, if more detailed citations are needed for a particular problem I will be glad to provide them.
Nutrition for women, fifth edition, page 113.