A recent study from Consumer Reports tested a variety of protein powders for lead, and if you’re a frequent protein powder drinker, you’re not going to like the results.

Basically, almost all of them contained lead — but some had so much lead that you begin to wonder where all the protein even is!

While many of the protein powders contained the toxic metal, vegan products had the most. For context, Consumer Reports states that the “level of concern” for lead consumption is just 0.5 micrograms per day. Naked Nutrition’s Vegan Mass Gainer had an incredible 1,572 percent more than that.

Why is this okay, legally speaking? As noted in the report, protein powders are supplements, and federal regulations in the United States don’t generally require manufacturers to prove their supplements are safe before putting them on the market. Not only that, but regulators around the world have either zero or incredibly high limits on the amount of lead that’s allowed in a supplement.

So yes, you can create a protein powder, spike it with lead and sell it under a name like “Ultra Mega Muscle Mix” — legally! The problems only start if someone complains that your Ultra Mega Muscle Mix caused their brain to stop working.

So, if you’re taking protein powder, you might want to check to make sure it’s of the “not filled with heavy metals” variety. Keep the heavy metals on the racks, not in your brain!