Is 1mL Germall Plus enough to preserve an 8oz HA serum or could it cause irritation?
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Germall Plus 1mL in 8oz – Overkill or Perfect Preservation?
6 days ago
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Stability improves, but diminishing returns past certain concentration
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Environment matters, humid conditions justify stronger preservative ratios
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Overengineering preservation common among beginners learning formulation basics
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