Historically, rice was rinsed to remove dirt, organic particles, bugs
and bug parts, etc. We no longer have that concern in this country.
Today, milling processes in some countries include adding glucose,
starch, and other coatings to improve the appearance of the rice, and
these things should probably be rinsed off.
In the US, 70% of the rice consumed here is enriched with vitamins and
minerals. If this rice gets rinsed, all those vitamins and minerals are
washed away. Some people rinse rice to make it less sticky. However,
there's another reason why some people rinse rice. It's due to arsenic
levels in the rice.
Some people suggest that rice is a source of arsenic poisoning. The small
amounts of arsenic found in rice consumed in a normal, varied adult diet are generally not a
concern, but two or three meals a day containing rice for an infant or
small child could double their risk of cancer.
Arsenic levels in rice are a factor of the type of rice and where it is
grown. It is not a result of current agricultural processes or
processing. The arsenic is found in the soil the rice grows in, and
arsenic levels are especially high in rice grown in Louisiana, Texas,
Arkansas, Mississippi, and Missouri. These areas were historically used
for raising cotton and as such were treated with pesticides that
contained arsenic. That arsenic accumulated in the soil, and rice
plants, in particular, are quite effective at taking up arsenic.
Basmati rice from India and California has the lowest levels of
arsenic. Due to their diets that include a lot of rice, Asians and
Mexicans are more at risk for toxic levels of arsenic in the body.
Arsenic exposure can be lessened by either boiling the rice with excess
water and then pouring that water off before serving, or by rinsing the
rice several times before cooking. Unfortunately, both of these methods
also wash away the vitamins and minerals.
So what's a person to do? Personally, I'll probably buy a few bags of
basmati rice grown in California to have on hand for small children.
But honestly, if we have stored a good variety of food, having rice once
or twice a week shouldn't cause any health issues. It might be an
entirely different matter for those planning to live on rice and beans
alone.
Links to related posts:
Rice
Thiamine Deficiency
DIY Instant Rice
For further reading:
https://www.consumerreports.org/cro/magazine/2012/11/arsenic-in-your-food/index.htm
https://www.fda.gov/media/96071/download
http://www.foodreference.com/html/a-rice-soak-rinse-1208.html
https://www.chowhound.com/food-news/148823/nagging-question-should-you-rinse-rice-before-cooking/
https://purelivingspace.com/blogs/health-wellness/the-rice-debate-what-is-the-best-choice-for-your-health
5.29.20