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I’ve been juicing some ginger by grating it and pressing it (by hand). A white residue collects at the bottom of the liquid. What is this?

juice in pan

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I believe that this white residue is starch. According to Wikipedia, Ginger is 17.7% carbohydrates by weight, or 14% excluding sugar and dietary fiber.

I let the residue settle and decanted the liquid. The residue behaved remarkably similarly to wet corn starch. From this, I have concluded that it is starch of some form.

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  • $\begingroup$ good point. You can also test it if you have an iodene antisceptic, the soy sauce colored antisceptic. if you pour it on starch it turns dark blue. $\endgroup$ Aug 11, 2019 at 14:26

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