I've use the CreaPure with no GI issues at 6 g per day, can't speak to the Thorne's though I am also interested in what other's experience has been.https://www.amazon.com/gp/product/B07S3ZCYXV

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That one brand has gone way up in price though since I got stocked up:
https://camelcamelcamel.com/product/B07S3ZCYXV