Safety guidelines and Blending Ratios for General Use: Sensitive skin, dermatitis, inflammation, allergic skin or perfume or cosmetic sensitivity: Avoid Clove; Eucalyptus; Ginger; Juniper; Oregano; Orange; Black Pepper; Peppermint; Sage: Spearmint; Thyme Pregnancy: First trimester or suspected pregnancy, previous history of miscarriage – Do not use any essential oils. Second & Third Trimester – Avoid Basil, Cedarwood, Clary Sage, Clove, Cypress, Eucalyptus, Fennel, Hyssop, Juniper, Jasmine, Lemongrass, Marjoram, Melissa, Myrrh, Niaouli, Rosemary, Sage, Thyme. Use Chamomile (German and Roman), Geranium, Lavender, Lemon, Orange, Mandarin and Rose in very low dilution 1-2% for massage and 3-4 drops in a bit of carrier oil for bath. High Blood Pressure: Avoid Eucalyptus, Hyssop, Rosemary, Thyme Low Blood Pressure: Avoid Lavender; Marjoram, Ylang Ylang Epilepsy: Avoid Eucalyptus, Fennel, Hyssop, Rosemary, Sage Kidney Problems: Avoid Black Pepper, Juniper Skin Cancer: Avoid all citrus oils Prostate Problems:Avoid Melissa, Pine Glaucoma: Melissa Consult aromatherapy books and our site’s Essential Oil profiles pages for more information on each oil’s benefits and cautions http://www.essentialaura.com/essentialoils.html Blending Ratios for safety and effectiveness Check back, more coming soon.