When evaluating Stevia tablets, the most critical factor is the Rebaudioside A (Reb-A) purity level, which should ideally be 97% or higher to ensure a clean taste without a bitter aftertaste. Additionally, check the carrier or bulking agent used (such as erythritol, lactose, or sodium bicarbonate) to ensure it aligns with your target market's dietary preferences, such as keto-friendly or diabetic-safe requirements. The dissolution rate is also vital; high-quality tablets should dissolve completely in hot or cold liquids within 30 to 60 seconds.