Yes, garlic pickle should be refrigerated after opening to maintain its quality, prevent spoilage, and inhibit the growth of harmful bacteria.
Garlic pickle, like many pickled products, is preserved through a combination of acidity (usually from vinegar or lemon juice) and salt. While these conditions inhibit the growth of many microorganisms, they don't eliminate them entirely. Once the jar is opened, the seal is broken, and the pickle is exposed to air and potential contaminants. Refrigeration significantly slows down the activity of any remaining microorganisms, including molds and bacteria, that could cause spoilage or pose a health risk. The cool temperature also helps to maintain the texture and flavor of the garlic, preventing it from becoming overly soft or developing off-flavors. Leaving garlic pickle at room temperature after opening can lead to fermentation, mold growth, and a change in taste and texture, making it unsafe to consume.
Always use a clean utensil to remove garlic pickle from the jar. Introducing bacteria from your hands or other foods can accelerate spoilage, even when refrigerated.