Lately, my left knee has been cracking, popping, and locking into place. At some point in our lives, most of us will suffer from aches and pains like these. We might think about taking a health or dietary supplement to help whatever is bothering us. Although some supplements found in pills, powders, and shakes have proven benefits, some don’t. If you’re looking online and you see a site that claims a supplement will cure a disease, stop the aging process, or lose weight fast, be skeptical.