I don't use this product everyday, but when I do I appreciate how fast it works - usually within 30 seconds of popping into my mouth. I used to use it quite often, but have change my diet, and stressed down my life. Now I use it only when I slip up on my diet. But I am allergic to Red dyes So I only use the Wintergreen flavor. Some of my family members are allergic to yellow, red and blue, and i don't think tums makes a plain white flavor anymore.