Why must wheat germ be refrigerated?
Written by
Thomas Wilson
Reviewed by
Prof. Benjamin Murphy, Ph.D.It is essential to refrigerate wheat germ so that its quality and nutrition can be preserved. The unsaturated fats present in wheat germ are unstable, and their rapid oxidation at room temperature can lead to rancidity. Refrigeration extends this period significantly and yields no development of bacteria, which frequently thrive at the higher temperatures.
Fat Protection
- Unsaturated fats oxidize quickly without cooling
- Rancidity develops within weeks at room temperature
- Cold storage preserves omega-3 fatty acids
Nutrient Preservation
- Vitamin E degrades rapidly in warmth and light
- B vitamins lose potency without refrigeration
- Antioxidants maintain effectiveness longer when chilled
Bacteria Prevention
- Pathogens multiply above 40°F (4°C)
- Refrigeration inhibits Salmonella and E. coli
- Moisture control prevents mold formation
Optimal Storage Practices
- Use airtight containers to block oxygen
- Keep in coldest part of refrigerator
- Avoid door storage due to temperature fluctuations
The wheat germ unsaturated fatty acids are very susceptible to oxidation. These good omega-3s become oxidized on exposure to air and heat. Rancidity results within weeks with unpleasant tastes and odors. Refrigeration retards oxidation, thus preserving health benefits and palatability.
Decomposition of nutrients occurs rapidly at room temperature. For example, vitamin E may lose as much as 50 percent of its content during two months unless protected under refrigeration. The vitamin B complex deteriorates along with other vitamins and antioxidants. The cold, consistent temperature of the refrigerator prolongs the integrity of food constituents indefinitely.
The danger of bacteria goes up considerably at over 40°F (4°C). Germ's moisture will allow pathogens to grow, such as Salmonella. The cold stops microbes from growing. Before use, you should always check for off-odors and urinate rancid.
To store optimally, use glass jars with tight-fitting lids within the main refrigerator section. Portion out into small containers to limit exposure to air. Freeze quantities of it for year-round freshness. Do not store near strongly flavored foods, as the wheat germ absorbs the odors easily.
Read the full article: Wheat Germ Benefits: Health and Nutrition Guide
