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After thawing the supplements, I see some precipitation. Is this normal?

Yes. Light flocculation can occur after thawing supplements that contain ECGS/heparin or BPE. This phenomenon is normal and does not affect the activity or performance of the medium. 
If desired, the precipitate can be removed by centrifugation under sterile conditions.
For optimal handling, we recommend thawing supplements (SupplementMix or SupplementPack) at 15-25°C, rather than at higher temperatures.

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