Many of my Organic Essential Oils are food grade. Do not consume concentrated essential oils directly from the bottle as this may cause irritation to the mouth, throat and stomach. Essential oils that are food grade include eucalyptus, lemon, orange, peppermint, white grapefruit, thyme, citronella, oregano, lavender, sage, clove, rosemary, lemongrass, wintergreen, geranium, and bergamot.
Essential oils designed for aromatherapy and topical use only include frankincense, tea tree, and tulsi holy basil.