| Item | Natural Vitamin E (D-alpha Tocopherol) | Synthetic Vitamin E (DL-alpha Tocopherol) | Synthetic Vitamin E (DL-alpha Tocopherol) | Vitamin E Acetate (Tocopherol Acetate) | Feed-Grade Vitamin E |
| Temperature | 15–25°C | 15–25°C | 15–25°C | 15–25°C | 15–25°C |
| Humidity | Keep away from moisture | Keep away from moisture | Keep away from moisture | Keep away from moisture | Keep away from moisture and avoid powder clumping |
| Light | Sensitive to light, strictly avoid light exposure | Sensitive to light, strictly avoid light exposure | Store away from light | Highly stable, but still recommended to avoid light | Store away from light |
| Air | Easily oxidized, nitrogen-filled or airtight storage recommended | Easily oxidized, nitrogen-filled or airtight storage recommended | Store in an airtight container | Store in an airtight container | Store in a sealed container to avoid prolonged exposure to air |
| Packaging | Recommended to be stored in a light-proof, airtight package to minimize repeated opening | Recommended to be stored in a light-proof, airtight package to minimize repeated opening | Keep in original packaging | Simply seal in the original packaging | Store in original, sealed packaging, protected from moisture |
| Environment | Keep away from heat sources and strong oxidizers | Keep away from heat sources and strong oxidizers | Keep away from heat and strong oxidizers | Store in a cool, dry place | Keep away from heat and strong oxidizers |
| Stability | Highest activity, relatively low stability, easily oxidized | Highest activity, relatively low stability, easily oxidized | Slightly more stable than natural vitamin E | Optimal stability, not easily oxidized | Good stability after coating treatment |
Shelf Life (Reference) | Approximately 24 months | Approximately 24 months | Approximately 24 months | 24–36 months | Approximately 24 months |