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Retail FAQ
Shipping, returns, dilution rates and the safety questions that come up most often. If your question is not here, ask us directly - we answer within 24 hours on business days.
Do you ship to my country?
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We ship retail orders across the EU, the UK, the US, Canada, Australia and New Zealand from our European fulfilment point. Delivery is typically 3-6 business days within the EU and 5-12 business days elsewhere. On the business side we ship worldwide, including DDP to most destinations.
What is the difference between retail and wholesale pricing?
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Retail prices are per 5 ml, 10 ml or 100 ml bottle and include packaging and consumer shipping. Wholesale prices are per kilogram or drum and exclude freight, which is quoted separately by volume and destination. The two systems are deliberately separate: retail pages never show minimum order quantities, and wholesale pages never show unit prices.
Can I return an unopened bottle?
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Yes. If a bottle is unopened and unused, you can return it within 30 days for a full refund. Opened bottles cannot be returned for hygiene reasons, unless the product arrived damaged or faulty - in which case we replace it. See our shipping and returns policy for the full terms.
Are essential oils safe to use on skin?
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Essential oils are concentrated and must be diluted before skin contact. Always dilute to no more than 1-2% for face and body use, and 0.5% or less for facial care. Never apply undiluted, never use around the eyes, and never ingest. If you are pregnant, have epilepsy, are asthmatic, or are treating a skin condition, please check with a doctor first. See our safety disclaimer for the full guidance.
Could I react to an essential oil?
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Yes. Fragrance materials including limonene, linalool, citral, geraniol, eugenol and coumarin are recognised sensitisers. If you have a known fragrance allergy, use carrier oil only or choose fragrance-free products. Patch test every new oil: one drop diluted in 5 ml of carrier oil, applied to the inside of the wrist and left for 24 hours.
How do I use a roller blend?
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Rollers are supplied pre-diluted in jojoba or a similar carrier, so they are ready to use. Apply to the pulse points - wrists, behind the ears, inner elbows - and let the skin warm the scent. For a room scent, add 3-5 drops of a single oil to a diffuser filled with water.
How long does an opened bottle last?
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Essential oils kept in a cool, dark place with the cap closed keep for 12 months after opening, and 24-36 months unopened. Oxidisation shows up as a change in colour or a flat, stale smell. Discard if either appears.
Do you offer gift wrapping or samples?
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Gift wrapping is available on request at checkout. For scent discovery we recommend our 3 ml sample vials, which let you try a material before committing to a full bottle.
Still stuck?
Email zhuxuran@yaosynbio.com, message us on WhatsApp +86 182 5601 9201, or use the contact form for a short question.
Contact usLooking for business pricing, minimum order quantities or documentation? Those are covered on the business FAQ.