How do I use this hyacinth aromatic oil safely in baths, massage blends, and body products?

This is a concentrated cosmetic fragrance oil, not a ready-to-use skin product. For a bath, start with 3–5 drops dispersed in a tablespoon of carrier oil (such as almond or jojoba) or a splash of full-fat milk, then swirl into warm running water — this helps the oil emulsify and prevents it from floating on the surface where it could contact skin undiluted. For massage, blend 1–2 drops per 10 ml of carrier oil; the aroma will develop gradually with body warmth. To scent a neutral body lotion or cream, add 1–2 drops per 30 ml portion, mix thoroughly, and test on a small area first. Do not exceed these ratios, and never apply the oil directly to skin, mucous membranes, or near the eyes. If irritation occurs, wash the area with mild soap and water and discontinue use.