I really like this brand. I had lasik surgery about a year ago and noticed I developed a lesion in my left cornea about two months ago. After it healed I wanted my eyes to be as strong as they could be. I trust this brand. I also use the joint supplement which has been amazing. So far so good with this as well.
I purchased this for my dad. He seems to like it. I have the timing down so that I only order it once per month. He is always on me to make sure we have a little extra so that he doesn't have to skip a dose. That tells me he thinks it's working.
I am a regular purchaser of this product and believe in its efficacy. The company is good with a lot of products on amazon with a lot of reviews. I trust the brand, and so far so good for this product as well.