https://www.ncbi.nlm.nih.gov/m/pubmed/24597007/
Here's the abstract from a paper which investigated the effectiveness of haemostatic clotting agents (quikclot or celox).
Which states "It did not conclusively demonstrate that this combat gauze is an effective hemostatic agent for use in trauma patients, but the results are promising in supporting its use"
I've never used it for real. So I can't anecdotally say its any good or not.
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