Opened almond milk should not sit out unrefrigerated for more than two hours. This is a general guideline for most perishable foods, as recommended by the Food and Drug Association (FDA). After two hours at room temperature, the risk of harmful bacterial growth increases significantly.
Factors Affecting Almond Milk Shelf Life at Room Temperature
Several factors influence how long almond milk remains safe at room temperature:
- Initial State: Unopened, shelf-stable almond milk can last longer at room temperature than opened almond milk. Some brands boast a shelf life of three to four weeks unopened and at room temperature.
- Temperature: Higher ambient temperatures accelerate bacterial growth, reducing the safe consumption window.
- Exposure: Once opened, almond milk is exposed to air and potential contaminants, increasing the risk of spoilage.
What Happens If Almond Milk Sits Out Too Long?
Leaving almond milk out for extended periods can lead to spoilage, indicated by:
- Sour Smell: A sour or off-putting odor is a clear sign of bacterial growth and spoilage.
- Changes in Taste and Texture: Spoiled almond milk may taste sour, bitter, or otherwise unpleasant. The texture might also change, becoming thicker or curdled.
Safe Handling Practices
To maintain the safety and quality of almond milk:
- Refrigerate promptly: Always refrigerate opened almond milk immediately.
- Check expiration dates: Pay close attention to the "best by" date on the carton.
- Trust your senses: If almond milk smells off or tastes unusual, discard it.
