1. A meaningful addition changes the preservation question
The botanical extracts hub includes liquids and powders with different carriers. Botanical extracts arrive as liquids and powders with different carriers. Adding one changes the finished system; an earlier result does not automatically transfer.
2. Read what arrives with the extract
The glycolic and hydroalcoholic extracts category shows why carrier matters. Record the complete INCI, carrier, water contribution and supplier documentation rather than counting only the plant name.
3. Clear appearance is not a challenge result
A batch that smells normal and remains clear has not demonstrated microbiological robustness. Review the active stability formulation notes in the context of the finished formula. Use appropriate finished-product validation after meaningful formula changes; do not invent a universal pass/fail number.