Why Is Arsenic Present in Rice?
Arsenic is a naturally occurring element widely found in soil and water. Rice plants are particularly effective at absorbing arsenic from their environment, especially when grown in flooded fields. Flooding creates anaerobic conditions that make soil arsenic more available to the plant. Unlike many other grains, rice absorbs significantly more arsenic. Industrial pollution and historical pesticide use have also contributed to elevated levels in certain farming areas.
The Difference Between Brown and White Rice
The type of rice you choose impacts its arsenic content. Brown rice includes the bran layer, which is nutritious but also where arsenic tends to accumulate. White rice undergoes milling, which removes the bran and reduces arsenic levels. While brown rice has higher inorganic arsenic concentrations, it also retains more fiber and nutrients than white rice. For most adults, the arsenic in brown rice is not a major concern, but it is for infants and toddlers who consume more rice relative to their size.
How Growing Region Influences Arsenic Levels
The geographic origin of rice is a significant factor in its arsenic content due to varying levels in soil and water globally.
Lower Arsenic Regions
- California-grown rice, including sushi varieties, often has lower arsenic levels.
- White basmati rice from India and Pakistan is known for its low inorganic arsenic content.
- Thai jasmine rice also tends to have lower levels.
Higher Arsenic Regions
- Rice from the South-Central U.S. (Arkansas, Louisiana, Texas) has historically shown higher arsenic concentrations.
- Arborio rice from Italy can also have elevated levels.
- Other areas with contaminated water or historical pesticide use, like parts of Bangladesh and India, may also produce rice with higher arsenic if local water is used for irrigation.
Does “Organic” Rice Mean Less Arsenic?
Organic rice does not necessarily contain less arsenic than conventionally grown rice. Since arsenic is a natural mineral absorbed from the environment, farming methods do not prevent its uptake. Focusing on rice variety and origin is more effective for managing arsenic exposure than choosing organic.
Table: Arsenic Levels by Rice Type and Origin
| Rice Type (uncooked) | Typical Inorganic Arsenic Levels | Key Characteristics | 
|---|---|---|
| Brown Rice (U.S., esp. South-Central) | Higher | Contains bran layer where arsenic concentrates. Also higher in fiber and nutrients. | 
| White Rice (U.S., esp. South-Central) | Lower | Bran layer removed via milling. Lower arsenic but also fewer nutrients. | 
| White Basmati (India/Pakistan/California) | Lower | Historically low levels compared to other varieties. | 
| Sushi Rice (California) | Lower | Medium-grain rice often grown with practices that limit arsenic. | 
| Jasmine Rice (Thailand) | Lower | Aromatic long-grain rice with lower typical arsenic levels. | 
| Arborio Rice (Italy) | Higher | Short-grain rice used for risotto, can contain higher levels. | 
| Instant/Parboiled Rice | Can vary; sometimes higher | Pre-cooked varieties can sometimes contain higher levels depending on processing. | 
How to Reduce Arsenic in Rice When Cooking
You can reduce arsenic in rice through simple cooking techniques.
- Rinse rice thoroughly with fresh water before cooking.
- Cook rice using a high water-to-rice ratio (6 to 10 parts water to 1 part rice), then drain the excess water. This method can reduce inorganic arsenic by 40–60%.
- Soaking rice overnight and discarding the water before cooking can also help.
- Use low-arsenic water for cooking, such as filtered water if your tap water is high in arsenic.
Diversifying Your Diet: Alternatives to Rice
Incorporating other grains into your diet is an effective way to lower overall arsenic exposure, especially for young children.
Alternatives to rice include:
- Quinoa
- Barley
- Farro
- Bulgur
- Millet
- Amaranth
- Cauliflower or Broccoli Rice
Conclusion
Yes, all types of rice contain some level of naturally occurring arsenic. However, the concentration varies based on type and origin; brown rice generally has more arsenic than white rice due to accumulation in the bran. Choosing rice from lower-arsenic regions (like California, India/Pakistan basmati, or Thai jasmine) and using cooking methods like rinsing and cooking with excess water can help reduce exposure. Diversifying your diet with other grains is also a good strategy to minimize reliance on rice and lower overall arsenic intake. For more information on arsenic, see the {Link: World Health Organization https://www.who.int/news-room/fact-sheets/detail/arsenic}.