The Busy Woman’s Collagen Guide: Week 4 — Purity & Testing

How to tell a supplement is genuinely clean — simply and clearly

When you take a supplement every day, you should feel confident that it’s both safe and exactly what it claims to be. Labels and packaging can look appealing, but true reassurance comes from knowing that the product has been properly checked for quality. These checks aren’t complicated — they’re simply there to confirm safety and purity.

The few checks that matter

Heavy-metal screening (especially important for marine collagen)

For products sourced from the ocean, this is a key step. It makes sure that unwanted elements such as lead, mercury, cadmium and arsenic are not present.

Identity & purity

This type of check confirms the ingredient on the label is exactly what’s inside the product, and that nothing undeclared has been added.

Microbial testing

A standard safety step that ensures the supplement is free from harmful bacteria or moulds.

Not every product needs every check — what matters is that the testing is suited to the ingredient and where it comes from.

Final thought

These quality checks aren’t about causing alarm; they’re about reassurance. They provide peace of mind that what you’re taking each day is genuinely clean, safe, and worthy of your trust.