The Modern Essentials Personal Guide section is a compilation of many different health conditions and the various essential oils, blends, and supplements that are commonly used and recommended for each condition. The first few pages of the Personal Guide section give very detailed instructions about the section's symbols, how to use the section, and other information. Following this, each condition is listed alphabetically; and under each condition, the oils, blends, and supplements suggested have been grouped (and color coded) as Primary Recommendation (red), Secondary Recommendation (orange), and Other Recommendation (green). You will also see images for application and usage methods. These methods recommend application methods for the oils suggested. The criteria for grouping within these categories include the recommendations of experts within the field of essential oils, supporting scientific research studies, historical uses of the oils and the herbs and plants they are derived from, and more recent French medicinal uses for the oils. However, since each individual may have different underlying causes for his or her specific condition, what may work for one individual may be different than what works for another.