I didn't buy this because of my tinnitus but after taking one capsule noticed my tinnitus was much lower in volume. I had taken another brand of chewable B12 which had no effect on anything. I was amazed to notice my tinnitus was barely audible and did some research and found a B12 deficiency can cause it. I have no other explanation for why my tinnitus suddenly improved so much but I will keep taking this. And apparently all brands of B12 are not the same. This one is great