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Do you test heavy metals and residual solvents?

Yes. Every lot is heavy-metal screened (Pb, As, Hg, Cd per food-safety / Cosmetic Safety Technical Specification limits) on the COA.

Because extraction uses food-grade solvent, we verify solvent residue with GB 5009.262 (not detected) — this is critical for a concrete, and Top reports it explicitly per lot. For cosmetic/food use we confirm residue is within the target market's limit.

We do not release a lot exceeding heavy-metal or solvent-residue limits. Buyers can request the specific panel and third-party verification.

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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. test