Is Your Supplement Label Lying to You? The Truth About Purity Testing
When you choose a supplement like L-Theanine, you’re doing it for a reason whether that’s to feel calmer, think clearer, or sleep better. But here’s the thing: not all supplements are created equal. Without proper testing, you can’t be 100% sure the product contains exactly what it says on the label, in the amount you expect and without anything harmful hiding inside.
That’s where third-party testing comes in and it’s something we take seriously at Everyday Supplements.
What Is Third-Party Testing?
Third-party testing is when an independent, accredited laboratory completely separate from the supplement manufacturer tests the product to verify:
- The ingredients match the label
- The purity is accurate
- The product is free from harmful contaminants (like heavy metals, pesticides, and microbes)
This step isn’t legally required for supplements in the UK. Brands may choose to do it to guarantee the product's quality and safety and give customers confidence in what they’re buying.
The Benefits of Third-Party Testing for You
Here’s why independent testing is so important from a consumer’s point of view:
You Know Exactly What You’re Taking
When you buy an L-Theanine supplement, you want L-Theanine not unnecessary fillers, hidden ingredients or a weaker dose than promised. Third-party testing ensures that what’s on the label is exactly what’s in the capsule.
Peace of Mind About Safety
Supplements can sometimes be contaminated with heavy metals, pesticides or bacteria during production. Independent testing screens for these dangers so you can take your daily supplement with confidence.
Trust in the Brand You Choose
When a company invests in independent testing, it’s a clear sign they take quality seriously. It’s about earning trust, not just making sales.
Better Value for Your Money
If a supplement is not tested, you may be missing out on it's benefits and wasting money. Testing helps to ensure you’re getting what you pay for.
Everyday Supplements: Tested, Trusted, Transparent
At Everyday Supplements, we know that when it comes to supplements, quality and purity matter most. That’s why every batch of our L-Theanine is independently tested in ISO 17025 accredited laboratories for:
- Purity: Confirming our L-Theanine is over 99% pure, with no unnecessary fillers or additives. High purity means you’re getting the full intended benefit of L-Theanine without diluting its effectiveness or consuming unwanted extras.
- Heavy Metals: Screening for contaminants like lead, arsenic, mercury and cadmium. Even in trace amounts, these metals can build up in the body over time and negatively impact your health, so keeping them out is essential for long-term safety.
- Microbiology: Ensuring your supplement is free from harmful bacteria or other microorganisms. This protects you from potential stomach upset, illness or reduced product shelf life.
What you see on the label is exactly what you get: pure L-Theanine with no hidden ingredients.
For your peace of mind, you can even verify the results yourself. Simply use the batch number printed on the bottom of your packaging to access our lab certificates.
Why This Matters for Your Daily Routine
When you take supplements daily, quality isn’t just a “nice to have”, it’s the foundation of their effectiveness.
With third-party tested supplements, you’re not guessing about what’s going into your body. You’re making an informed, confident choice backed by science and proof.
In a market full of unverified products, third-party testing is your safeguard. It’s the difference between hoping your supplement works and knowing it does.
At Everyday Supplements, we believe you deserve proof, not promises. That’s why every batch of our L-Theanine is independently tested for purity, safety, and potency so you can focus on your day, not on what’s in your capsule.