Which of the following has the highest amount of fluoride?

Appeared in: P.CHO-2019

Explanation

Black rock salt (Kala Namak) is a natural rock salt that contains various minerals, including a significant amount of fluoride.
In regions with high natural fluoride in the water (endemic fluorosis), health guidelines often recommend avoiding black rock salt to prevent excessive fluoride intake.
This recommendation implies that black rock salt is a potent source of fluoride compared to other common salts.

Option B: Iodized salt is fortified with iodine to prevent iodine deficiency disorders. It does not naturally contain high levels of fluoride. Salt that is intentionally fortified with fluoride is specifically labeled as 'fluoridated salt' and is a different product.
Option C: Sugar (sucrose) is a highly refined carbohydrate. The refining process removes virtually all minerals, so it contains no significant amount of fluoride.
Option D: This option is incorrect because only black rock salt has a high fluoride content among the choices. Iodized salt and sugar have negligible amounts.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Sources of dietary fluoride as background academic context rather than a clinical decision trigger.
Understanding dietary sources of fluoride is crucial for nurses, especially in community health settings in India, where endemic fluorosis is a public health concern.
Nurses must educate communities on both the benefits of adequate fluoride for dental health and the risks of excessive intake, which can cause dental and skeletal fluorosis.
Patient counseling should include asking about the type of salt used at home (common, iodized, or rock salt) when assessing nutritional habits, particularly in areas known for high fluoride levels in groundwater.

How to Approach the Question

First, identify the key substance in the question: 'fluoride'.
Next, analyze the options provided: Black rock salt, Iodized salt, and Sugar.
Recall or deduce the composition of each option. 'Iodized' salt primarily contains iodine. 'Sugar' is a refined carbohydrate with no minerals. 'Black rock salt' is a natural, unrefined salt known for its mineral content.
Based on this, infer that the unrefined rock salt is the most likely to contain other minerals like fluoride in higher quantities compared to refined sugar or salt specifically fortified with only iodine.
Therefore, conclude that black rock salt has the highest amount of fluoride among the given choices.

Concept Tested & Keywords

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E6 Comprehensive Textbook of Community Health NursingShyamala D part 1 (pp 26-389 of 389) p. 209-211

E6 textbook of Applied Biochemistry and Nutrition & Dietetics 2nd Edition Harbans Lal (pp 26-464 of 479) p. 26-479

Practise the full P.CHO-2019

Attempt every question from this paper in a timed mock, then review the full solution for each one.