I noticed a difference immediately in feeling productive, wanting to do things. After 5 days I also noticed an unbelievable difference in my lungs. I have COPD and when walking around the park with dogs I find it difficult to go up inclines . I didn't stop, and told my sister, look! I am not struggling to breathe! I am amazed , and so much more motivated to go walking more and do what I love to do, and that is hiking and riding my horses. I just started this product and want to stay on it. I just wish Yada would give senior discount , with proof like some sites do to make sure I can stay on it and others on limited incomes. I love this Apple of Eve. Seniors need alittle break to afford this . Please give it thought 🙏