It is showing on your product pages, only the color is so light we can barely notice it. You might have to go in your theme editor => settings => colors. My guess is that you have a white/lightgray color in there that is applied to your text, including your product description.
Max is right, and should get the credit for the solution.
I just wanted to share a simple trick for situations like that. If you think text might be missing, just click in an empty area of the page, and select all (either ⌘+A or ctrl+a). Once you find the item that's giving you fits, right-click it, and select "Inspect", which, in Chrome, will show you the HTML and CSS that's affecting that element.