## **Core Concept**
Fructose intolerance, also known as hereditary fructose intolerance (HFI), is a genetic disorder caused by the deficiency of the enzyme **aldolase B**, which is necessary for the metabolism of **fructose** in the liver. This condition leads to an accumulation of fructose-1-phosphate, causing **hypoglycemia**, **lactic acidosis**, and **hepatic dysfunction**.

## **Why the Correct Answer is Right**
The correct management of fructose intolerance involves avoiding dietary **fructose** and **sucrose** (a disaccharide composed of glucose and fructose). Patients with HFI must strictly limit their intake of fruits, candies, and processed foods containing these sugars to prevent acute metabolic crises.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option might seem plausible but does not directly relate to common management strategies for fructose intolerance.
- **Option B:** Similarly, this option does not directly pertain to the dietary restrictions crucial for managing HFI.
- **Option C:** This option might relate to a treatment approach but does not directly address what is not given to patients with fructose intolerance.
- **Option D:** **Glucose** is actually a safe and often recommended alternative energy source for patients with fructose intolerance, as it does not require the deficient enzyme for its metabolism.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl for managing patients with hereditary fructose intolerance is to ensure they avoid **fructose-containing foods** and **sucrose**. A classic presentation of HFI is an **acute metabolic reaction** following the ingestion of fructose-containing foods, characterized by symptoms such as **vomiting**, **hypoglycemia**, and **lactic acidosis**.

## **Correct Answer:** .