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What usage rates and dilution ratios are recommended for this Nardostachys spikenard oil?

Recommended starting levels: fine perfume 0.5–2%; skincare/cosmetics 0.5–1.5% (leave-on) and up to 2% in rinse-off; candles 1–3%; incense/blends 1–3%; soap 0.5–1%. Because the oil is potent and sesquiterpene-rich, start at the low end and build. For skin use always dilute in a carrier (jojoba, almond, MCT) and do a patch test; avoid during pregnancy and on infants.

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Guilin Four Seasons Sunshine

Founded in 2006, Guilin Four Seasons Sunshine F&F Co., Ltd. is a natural plant extract manufacturer and OEM/ODM partner in Guilin, China, combining proprietary Living-Fragrance physical extraction with supercritical fluid extraction to deliver pure, traceable botanical ingredients to global food, flavor, fragrance and personal care brands.