Vitamin D is manufactured in our bodies by the skin. Sun exposure of 20 minutes is required. Then increase use of foods as mentioned. The best approach is to have complete blood tests. Then a complete natural hormone replacement program can be stared.
Standardization is a new buzz word that is really a double-edged sword.
Herbs have been used for thousands of years before standardization was invented. However, it can be useful in terms of having a similar dose for each person. Even if an herb is standardized it does not mean it is of high quality. For instance, many of the large drug manufacturers are now offering standardized products. However, they are also adding many contaminants along with the standard herbs like dyes, colorings, titanium dioxide, etc.