S04E31. What "Third Party Tested" Actually Means on Your Supplements

That "third party tested" label on your supplements, peptides, and protein powder probably means a lot less than you think it does.

In this episode, Katie and Cris get spicy on one of the most misunderstood phrases in the wellness world: "third party tested." Cris breaks down the four levels of testing, from a company grading its own homework to truly independent watchdog testing, and explains why the version on almost every bottle tells you nothing about whether the product is actually safe. From peptide purity tests that skip heavy metals, to what the FDA does and doesn't check, to mushroom powders that are mostly starch, to how Amazon's warehouse system lets counterfeits slip into brand-name listings, this one will change how you read a label forever. If you've ever bought something because it said "third party tested" and felt safe, this is the episode for you.

In This Episode We Cover

• The four levels of testing and why "third party tested" sits closer to the bottom than you'd expect.
• Why a peptide can test 99.5% pure and still never get checked for mercury, lead, or arsenic.
• How the 1994 DSHEA law means the FDA doesn't approve supplements before they hit the shelf.
• Why the FDA inspects only about 5% of supplement facilities each year, in their own director's words.
• How "mycelium on grain" mushroom products can be 30 to 40% starch with almost no active compounds.
• Why Amazon's commingled inventory means even a brand's official listing can ship you a counterfeit.

Resources & Links Mentioned

• ConsumerLab (independent supplement testing organization)
• Labdoor (independent supplement testing organization)
• Clean Label Project (independent testing and certification organization)
• NSF Certified for Sport (third-party certification to look for)
• USP Verified (third-party certification to look for)
• NOW Foods Quality & Safety (supplement brand that publicly tests supplement quality and publishes testing results, including investigations into counterfeit products sold on Amazon)
• NOW Foods Amazon Authenticity Guide (how to identify authentic NOW Foods products when shopping on Amazon)
• The HTMA Testing Package
• The DUTCH Testing Package
  
  

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What is Keep It Clear?

Struggling with acne, hormones, or gut issues that no one seems to explain in plain English? Keep It Clear is the podcast that cuts through the noise. ✨

Hosted by Registered Holistic Nutritionists and acne experts Katie Stewart and Cris Brown, who've helped 3,000+ clients across 15+ countries clear their skin from the inside out.

Every episode breaks down what your skin and body actually need, across the 5 things that drive breakouts: gut health, detoxification, hormonal balance, nervous system regulation, and nourishing skincare. You'll get practical tips, real client stories, and clinical answers to the questions you've been Googling at 1am. 💜

Because clear isn't just about your skin. It's about feeling confident, balanced, and aligned in every part of your health.

In a world that makes women's health way too complicated, this show keeps it simple: clear skin, clear body, clear mind, clear life. Tune in and let's Keep It Clear.

(Formerly The Clear Skin Chronicles.)

💻 Website: katiestewartwellness.com

📱 Instagram: @katiestewartwellness