Understanding Water Activity and Why It Matters for Edibles infographic

Understanding Water Activity and Why It Matters for Edibles

A Measure of Available Water, Not Just Moisture

Building on the microbial testing and stability content discussed elsewhere in this publication, water activity is a measure of how much water in a product is available to support microbial growth. It differs from moisture content, which is the total amount of water present.

Why It Matters for Edibles

Edibles such as gummies, baked goods, and chocolates are shelf-stable only if conditions limit microbial growth. Water activity is one of the main controls, alongside acidity and preservatives.

How It Is Used

  • Lower water activity generally means a lower risk of microbial growth
  • Formulators set a target range for each product and verify it with testing
  • Changes in ingredients, cooking, or packaging can shift the value

Link to Compliance and Quality

Water activity supports shelf-life claims and helps explain microbial results. A product that drifts above its target range can spoil or fail microbial testing before its labeled date.

What Buyers Should Ask

Ask finished-product makers for target water activity, test results by batch, and how formulation changes are re-verified.

Low Gravity Hemp provides edible ingredient data to support water activity targets. Contact us to talk through your formulation.

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