Albert > wrote:

> Is glucono-delta-lactone safe to eat?

It is a naturally-occuring acidulant. Apparently, it is safe to eat,
but diarrhoea should be taken into consideration, though possibly not in
the concentration of the substance in that rice you mention. See, for
example,

<http://www.ams.usda.gov/nop/NationalList/TAPReviews/GluconoDeltaLactone.pdf>

<http://www.inchem.org/documents/jecfa/jecmono/v06je44.htm>

<http://www.inchem.org/documents/jecfa/jecmono/v21je14.htm>

Victor