supplement-safety-check
Norton points out that heavy metal contamination in supplements was a larger issue 10 years ago. Since then, GMP (Good Manufacturing Practices) certification became more widespread, imposing strict quality control standards on manufacturing processes. This has made supplements much safer. However, not all products are created equal, so the consumer should look for explicit statements of third-party testing and GMP certification on the label or website. He cites this advice in response to the lawsuit allegation: rather than rely on lawsuit filings, use these markers. The sparkling protein drink itself may be fine, but the heuristic applies universally. He does not specify a brand or tie this to personal use, but presents it as a general rule of thumb.
if you're going to buy a supplement, make sure it's third party tested. Make sure it's made in a GMP certified facility and you're going to be good to

