Generally Parboiling technique is used for preserving nutritive quality of which grain?

NIA - 29 January 2023

Applied Nutrition & Dietetics

Easy

Appeared in: NIA - 29 January 2023

Explanation

Parboiling is a pre-milling hydrothermal treatment specifically and most commonly applied to rice (paddy).
The process involves three key stages: soaking, steaming, and drying the grain before milling.
The steaming step is critical as it drives water-soluble nutrients, particularly B-vitamins like thiamine, from the outer bran layer into the inner starchy endosperm.
This mechanism ensures that these vital nutrients are retained in the grain even after the bran is removed during polishing, making parboiled rice nutritionally superior to regular white rice.

Option A: Maize is not typically parboiled. Its primary processing method to improve nutritional value is nixtamalization, where the grain is soaked and cooked in an alkaline solution, which helps to release niacin and reduce mycotoxins.
Option C: Wheat is primarily processed by milling it into flour (atta or maida). Parboiling is not a standard industrial or traditional process for preserving nutrients in wheat.
Option D: While millets are highly nutritious, parboiling is not the conventional method used for them. They are typically processed by de-hulling and then consumed whole or ground into flour.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Food processing techniques and nutrient preservation as background academic context rather than a clinical decision trigger.
Promoting the consumption of parboiled rice over polished white rice is a key public health nursing intervention to combat thiamine (Vitamin B1) deficiency.
This is crucial in populations where rice is the staple food, as severe thiamine deficiency can lead to Beriberi, a serious neurological and cardiovascular disease.
What if? If a patient from a rice-eating community presents with symptoms of peripheral neuropathy, confusion, and edema (wet beriberi), the nurse should consider thiamine deficiency as a possible cause and inquire about their dietary habits, specifically the type of rice they consume.

How to Approach the Question

First, identify the key term in the question, which is 'Parboiling technique'.
Recall the definition and purpose of this food processing method. Parboiling specifically refers to partially boiling the grain while it is still in its husk.
Consider the options provided and associate the parboiling technique with the grain for which it is most famously and widely used.
Evaluate the options: Rice is well-known to be parboiled to improve its nutritional profile and texture.
Eliminate the other grains by recalling their primary processing methods: Maize undergoes nixtamalization, wheat is milled into flour, and millets are typically dehulled and ground.
Conclude that rice is the correct answer as parboiling is a technique specifically tailored to preserve its nutrients.

Concept Tested & Keywords

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 161-163