How We Test and Verify Magnesium Glycinate Purity

When you buy a magnesium glycinate supplement, purity and testing standards matter just as much as the ingredients. At Love Life Supplements, we don’t rely on marketing claims — we rely on data. Every batch of our Magnesium Glycinate Capsules is made and tested in the UK under Good Manufacturing Practice (GMP) and BRC certification, with independent third-party verification for identity, potency and safety.

Why Purity Testing Matters

Magnesium supplements vary widely in quality. Low-cost products may be buffered with magnesium oxide, include unnecessary fillers, or skip lab testing altogether. While these may appear similar on the label, their actual magnesium content and bioavailability can differ dramatically.

Our fully reacted magnesium bisglycinate avoids those issues. The chelation process ensures the magnesium remains bound to glycine, improving absorption and minimising gastrointestinal upset. But we don’t stop there — we verify it independently to prove purity and strength.

Step 1: Ingredient Verification

Before manufacturing begins, every raw material batch is accompanied by a supplier Certificate of Analysis (COA). This confirms the source, specification, and purity of the raw magnesium bisglycinate. Our QA team then performs identity checks to confirm it’s fully reacted and not blended with oxide or carbonate.

Our suppliers are audited against ISO, HACCP and BRC standards, ensuring quality right from the source.

Step 2: GMP & BRC Manufacturing Standards

Production takes place in a UK facility certified to both Good Manufacturing Practice (GMP) and British Retail Consortium (BRC) standards. These certifications cover:

• Batch traceability — every ingredient is tracked from supplier to final product.
• Sanitation and process control — to prevent contamination or cross-contact.
• Consistent potency — ensuring the magnesium per capsule matches our label claims.
• Regular audits — conducted by independent regulatory bodies.

It’s this framework that ensures your supplement delivers the exact magnesium level and purity promised.

Step 3: Independent Third-Party Testing

Once encapsulated, every batch of Love Life Supplements Magnesium Glycinate undergoes third-party lab testing through accredited UK analytical laboratories. These tests verify:

• Elemental magnesium content — confirming around 300 mg elemental magnesium per daily serving.
• Heavy-metal safety — ensuring levels of lead, arsenic, cadmium and mercury are well below EU and UK limits.
• Microbiological analysis — ruling out harmful bacteria or moulds.
• Identity and authenticity — verifying the compound is true magnesium bisglycinate, not a mix of cheaper salts.

These results are cross-checked internally before a batch is released for sale. Only verified lots are packaged and shipped.

Step 4: Transparency and Traceability

Every lot is tracked through a batch control system linking back to supplier COAs and third-party lab reports. This means that if you contact us with your batch number, we can trace your product’s entire testing history — from raw material to finished capsule.

We believe this level of transparency is essential to trust, especially in an industry often criticised for opacity and under-testing.

Step 5: Ongoing Stability Monitoring

Even after production, we conduct ongoing stability testing to ensure the product maintains potency and purity throughout its shelf life. Our capsules are stored under controlled humidity and temperature conditions to prevent moisture degradation or oxidation.

Fully Reacted vs Buffered: The Purity Difference

Some magnesium glycinate products are “buffered” — meaning they’re mixed with magnesium oxide, a cheaper and less absorbable form. While the label may still read “magnesium glycinate,” the result is a diluted product with lower bioavailability and more digestive side effects.

Our Magnesium Glycinate Capsules are fully reacted. Every molecule of magnesium is bonded to glycine, ensuring high absorption and gentle tolerance. We verify this through FTIR (Fourier-transform infrared spectroscopy) during lab testing, which confirms the molecular signature of true bisglycinate.

Beyond Purity — What Testing Can’t Fake

Lab results matter, but testing can’t fake integrity. It’s why we also focus on clean formulation — no fillers, no binders, no hidden excipients. Each capsule contains only magnesium bisglycinate and a vegan capsule shell (hypromellose). Nothing else.

That simplicity keeps absorption predictable and ensures long-term compliance, especially for users with sensitive digestion.

Environmental Responsibility and Ethical Sourcing

Purity also extends to how we source materials. Our suppliers operate under strict environmental and ethical standards, minimising waste and avoiding over-harvesting of natural minerals. Our UK facility uses recycled packaging wherever possible and complies with ISO 14001 environmental management.

Stacking for Comprehensive Results

Our Magnesium Glycinate Capsules work well alone, and also pair with these LLS products for broader support:

• Vitamin D3 + K2 (K2VITAL®) — supports calcium balance, bones and cardiovascular health alongside magnesium.
• Organic Ashwagandha KSM-66® — complements magnesium for stress resilience and evening wind-down.
• Magnesium 7 — a multi-form complex if you prefer a broader magnesium profile.
• Shilajit Capsules — supports energy and recovery; a popular partner for active routines.

Learn More About Our Ingredient Testing

Visit our Ingredients A–Z entry for Magnesium Glycinate to explore certificates, lab testing data and formulation rationale. We also provide science-backed blogs covering:

• Magnesium Glycinate Benefits, Uses & Science
• Glycinate vs Citrate vs Oxide
• Beginner’s Guide to Magnesium Glycinate

FAQs

Do you publish your third-party lab results?

We don’t publish full COAs publicly for proprietary reasons, but every batch is tested by accredited UK labs and available upon request for transparency.

What contaminants do you test for?

Heavy metals (lead, arsenic, cadmium, mercury), microbial contamination, and identity verification via spectroscopy or chromatography.

Are your capsules tested for allergens?

Yes — they are free from gluten, dairy, soy and GMOs. Allergen testing is included in our third-party verification process.

How do I know my product was tested?

Each bottle includes a batch number that links directly to its COA and testing record in our quality system.

Is third-party testing common in supplements?

Unfortunately not. It adds cost, but it’s the only way to guarantee integrity — which is why we make it standard for every LLS product.

References

• de Baaij JHF, Hoenderop JGJ, Bindels RJM. Magnesium in man: implications for health and disease. Physiol Rev. 2015. PubMed
• Firoz M, Graber M. Bioavailability of US commercial magnesium preparations. Magnes Res. 2001. PubMed
• NIH ODS. Magnesium — Fact Sheet for Health Professionals. NIH ODS
• ISO 14001 Environmental Management Systems — Requirements with Guidance for Use. International Organization for Standardization.

Accessed and current October 2025.

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