No, stevia does not lose its sweetness over time if stored properly. It has a long shelf life and is stable at high temperatures, making it suitable for cooking and baking. While some users report a change in perceived sweetness after prolonged consumption, this is often attributed to tastebud adaptation rather than actual loss of sweetness in the product itself. Here's a more detailed explanation:
Stability:
Stevia is known for its stability, meaning it doesn't readily degrade or lose its sweetness over time, even when exposed to heat.
Shelf Life:
Most commercially produced stevia products have a long shelf life, often lasting for years when stored properly.
Taste Bud Adaptation:
Some individuals report needing to use more stevia over time to achieve the same level of sweetness. This is likely due to taste bud adaptation to the sweetness rather than the stevia itself losing its potency.
Potential for Bitterness:
Stevia can have a slightly bitter or licorice-like aftertaste, particularly at higher concentrations. This is a separate issue from the sweetness and may be more noticeable to some individuals over time.
Proper Storage:
To ensure optimal quality and longevity, it's best to store stevia in a cool, dry place, away from moisture and direct sunlight.
Poster Comment:
The reason I asked that question is because I had to open a new 8 oz. (1/2 lb.) bag the other day, same brand. A half lb. lasts a looong time, years. I use a scant 1/4 tsp. in a pot of tea and a scant 1/2 tsp. in unsweetened Kool-Aid to replace the 1 cup of granulated sugar recommended.
I dunno, this last pot of black tea is almost sickly sweet with the same scant 1/4 tsp. Maybe the density of the powder varies or something. Weird.