Fortification with iron is safe for people with blood disorders. â« Fortification with folic acid does not mask vitamin
Concerns, myths and misconceptions of rice fortification Helena Pachón Senior Nutrition Scientist Food Fortification Initiative
[email protected]
Is rice fortification safe? EAR RDA / RNI
UL
EAR: Estimated Average Requirement; RDA: Recommended Dietary Allowance / RNI: Recommended Nutrient Intakes; UL: Tolerable Upper Intake Level
Definitions from IOM 2000, p. 3
Is rice fortification safe? Percent of Non-pregnant Adults (>19 Years) in USA with Folic Acid Intake above Tolerable Upper Intake Level (UL) 9.4
10 8 5.5
6
4
2.7
2 0
0 Overall
Mandatory
0 Mandatory + voluntary
Mandatory + supplements
Mandatory + voluntary + supplements
Mandatory folic-acid fortification of cereal grains (including rice) is safe Only people consuming supplements had intake levels above the UL Yang 2010; It is recommended that pregnant women consume 400 mcg folic acid daily; Mandatory: wheat flour, maize flour, rice; Voluntary: ready-to-eat foods
Is rice fortification safe? Fortification with iron is safe for people with blood disorders Fortification with folic acid does not mask vitamin B12 deficiency cc licence by flickr. Picture by Michael Sean Gallagher. ç
Fortification is safe Grant 2012; Mills 2003; MPI 2012
cc licence by flickr. Picture by Alpha
Can rice fortification eliminate all micronutrient deficiencies? Percentage of Mexican Women with Iron Deficiency after Six Months of Consuming Fortified Rice or Milled (unfortified) Rice 32.7
26.5
22.7
27.5
35 30 25 20 15 10 5 0
Fortified rice
Milled rice Baseline
Endline
Rice fortification will help reduce micronutrient deficiencies Rice fortification will not eliminate micronutrient deficiencies in their totality Population should strive to eat a healthy diet Some population groups will need additional interventions Hotz 2008
What is the difference between fortified and bio-fortified rice? Added nutrients
Fortified
When
During industrial During its development via plant processing breeding or genetic modification (GM)
Time frame Which
Levels
Bio-fortified
Now After breeding/GM (years-decades) Virtually any can Iron1, zinc1, beta-carotene2 (mainly) be added
Higher
Lower
These are complementary strategies to reduce micronutrient deficiencies
Nestel 2006; Ye 2000; 1Through plant breeding; 2Through genetic modification: Golden Rice
Why not eat parboiled rice or brown rice instead of fortified rice? 8
Milled rice
Brown rice
Zinc
Thiamin
Parboiled white rice
mg/100 grams rice
7 6 5 4 3 2 1 0 Iron
Niacin
Vitamin B6
Brown rice and parboiled rice are more micronutrient-rich than milled rice USDA Nutrient Data Bank; fortified rice as USDA commodity requirements 2014; Vitamin A, folate, vitamin B12 content is negligible in milled, brown or parboiled rice
Why not eat parboiled rice or brown rice instead of fortified rice? 8
Milled rice
Brown rice
Parboiled white rice
Fortified rice*
mg/100 grams rice
7 6 5 4 3 2 1
0 Iron
Zinc
Thiamin
Niacin
Vitamin B6
Fortified rice is more micronutrient-dense than milled rice, brown rice and parboiled rice USDA Nutrient Data Bank; * Fortified rice per USDA (2014) requirements for international food assistance programs; Vitamin A, folate, vitamin B12 content is negligible in milled, brown or parboiled rice; can be significant in fortified rice
Why not eat parboiled rice or brown rice instead of fortified rice? Percent of USA Population Consuming at least 3 Whole Grain Ounce Equivalents per Day
Adults (>19 y)
7.7
Children (2-18 y)
2.9 0
10
20
30
40
50
60
70
80
90
100
Despite recommendations, consumption of whole grains is low Reicks 2014
Is fortified rice only needed by lowincome groups? Percent of Non-pregnant Vietnamese Women (15-49 Years) with Iron Deficiency, by Socioeconomic Status (SES) 25
20.7
20
15.1 11.9
11.9 15
11.2
10
5
0 1 (lowest SES)
2
3
4
Nutrient deficiencies affect all socioeconomic strata All could benefit from fortified rice Laillou 2012
5 (highest SES)
Image: dreamstime.com
Can any variety of rice be fortified?
Any variety of rice can be fortified—Requires tailoring of fortified kernel
Is fortified rice acceptable to consumers? Acceptability Scores for Fortified and Non-fortified Rice: Sensory Evaluation by Indian Children 8-11 Years 5
No statistically significant differences between fortified & non-fortified rice
4 3 2 1
0 Appearance
Color
Texture
Fortified rice
Odor
Taste
Non-fortified rice
Fortified rice tastes, looks and smells like non-fortified rice Radhika 2011; extruded rice
Overall
Are the nutrients in fortified rice retained after preparation and cooking? Percent Retention of Nutrients Exposed to Different Preparation and Cooking Methods: Average for Coating, Cold Extrusion & Hot Extrusion 120
30 min soaking before boiling in excess water and discarding water
100 80 60
Boiling in excess water and discarding water
Excess
Boiling and letting rice absorb water
Boiling
40 20
0
Washing before boiling and letting rice absorb water Frying before boiling and letting rice absorb water Zinc
Excess + soaking
Iron
Vit. A
Vit. B12
Boiling + washing Frying
Folic acid
In fortified rice made through coating and extrusion technologies, there is good retention of most nutrients (except Vitamin A) over a wide variety of washing and cooking methods Wieringa 2014
Conclusions (1) Rice fortification is safe Rice fortification will increase nutrient intake but cannot eliminate all micronutrient deficiencies Rice fortification & bio-fortification are different and complementary interventions Fortified rice is designed to be more micronutrientrich than brown, parboiled or milled rice
Conclusions (2) Rice fortification can benefit all strata of society who have nutrient deficiencies (or are at risk) Any variety of rice can be fortified When properly produced, fortified rice tastes, smells and looks the same as non-fortified rice Most nutrients (except Vitamin A) in fortified rice (coating, extrusion) are retained after preparation and cooking
ಧನ್ಯವಾದ
ধন্যবাদ
धन्यवाद
ຂອບ ອບໃໃຈ ຈທ ທ ານ ໍຂ ໍຂຂ ່ ່ ານ
Thank you
Terima kasih
ଧନ୍ୟବାଦ୍
ඉස්තුති
ឣរគុណ
Salamat Po
References • Grant A. Evidence for the safety of fortifying flour with iron in the presence of thalassemia and other blood disorders (presentation). 2012. http://ffinetwork.org/about/calendar/2012/Documents%202012/TurkeySummary.pdf • Hotz C et al. Efficacy of iron-fortified Ultra Rice in improving the iron status of women in Mexico. Food Nutr Bull. 2008;29:140-9. • Institute of Medicine. Dietary reference intakes: Applications in dietary assessments. Washington DC, National Academy Press, 2000. [http://www.nap.edu/catalog.php?record_id=9956]. • Laillou A et al. Micronutrient deficits are still public health issues among women and young children in Vietnam. PLoS ONE 7(4): e34906. doi:10.1371/journal.pone.0034906 2012. • Mills JL et al. Low vitamin B-12 concentrations in patients without anemia: the effect of folic acid fortification of grain. Am J Clin Nutr 2003;77:1474-7. • Ministry for Primary Industries (MPI). Voluntary folic acid fortification monitoring and evaluation report. MPI Technical Paper No: 2012/01. MPI: Wellington, MPI, 2012. • Nestel P et al. Biofortification of staple food crops. J Nutr 2006:136;1067-7. • Radhika MS et al. Micronized ferric pyrophosphate supplied through extruded rice kernels improves body iron stores in children: a double-blind, randomized, placebo-controlled midday meal feeding trial in Indian schoolchildren. Am J Clin Nutr. 2011;94:1202-10. • Reicks et al. Total dietary fibre intakes in the US population are related to whole grain consumption: results from the National Health and Nutrition Examination Survey 2009-2010. Nutrition Research 2014. • USDA. USDA commodity requirements: MR24 milled rice and fortified milled rice for use in international food assistance programs. USDA, 2014. www.fsa.usda.gov/Internet/FSA_File/mr23.pdf • USDA Nutrient Data Bank. http://ndb.nal.usda.gov/ndb/search/list • Wieringa FT et al. Stability and retention of micronutrients in fortified rice prepared using different cooking methods. Ann NY Acad Sci 204;1-8. • Yang Q et al. Folic acid source, usual intake, and folate and vitamin B-12 status in US adults: National Health and Nutrition Examination Survey (NHANES) 2003–2006. Am J Clin Nutr 2010;91:64-72. • Ye X et al. Engineering the provitamin A (b-carotene) biosynthetic pathway into (carotenoid-free) rice endosperm. Science 2000;287:303-5.