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Global GreenTag Product Health Declaration™ (PHD) is a transparency and material health rating tool that assesses and discloses the health impacts of products.


What Is PHD Certification?

PHD Certification (Product Health Declaration™) is a globally recognized certification developed by Global GreenTag International to assess and disclose the health impacts of products. It provides a transparent assessment of a product’s chemical composition, potential health risks, and overall safety for use in homes, workplaces, and construction projects.

Unlike traditional certifications that focus only on the hazards of individual ingredients, PHD Certification assesses the impact of the final product on human health throughout its entire life cycle. This assessment covers material sourcing, manufacturing, use, and disposal stages. It also considers volatile organic compound (VOC) emissions, toxicity risks, and allergen sensitivities.

PHD Certification is widely recognized by leading green building standards, including the WELL™ Building Standard, LEED®, Green Star®, and Green Globes®.

Certified products receive a HealthRATE™ mark, classified according to their health performance at Bronze (Good), Silver (Very Good), Gold (Excellent), and Platinum (World Leading) levels.

To obtain PHD Certification, manufacturers must disclose their ingredients with 100% transparency down to 100 parts per million (100 ppm), undergo an independent and peer-reviewed toxicological assessment, and comply with global health and safety regulations.

PHD Certification helps consumers, businesses, and architects make informed decisions by ensuring that materials used in buildings and indoor spaces support human health and environmental sustainability.


How Is PHD Certification Different from Other Certifications?

PHD Certification (Product Health Declaration™) differs from other certifications by focusing on the health impact of the final product rather than assessing only individual ingredients.

Unlike traditional material transparency programs, PHD evaluates toxicity, VOC emissions, and potential health risks throughout the life cycle, supporting the use of safer products for consumers and the environment.

PHD Certification is recognized by WELL™, LEED®, Green Star®, and Green Globes® and provides a HealthRATE™ mark ranging from Bronze to Platinum to indicate product safety levels.

Manufacturers are required to disclose 100% of their ingredients down to 100 ppm and undergo independent toxicological reviews. With these features, PHD Certification is one of the most comprehensive health-focused certifications currently available.


Which Industries Benefit from PHD Certification?

PHD Certification is particularly beneficial for industries that prioritize health, sustainability, and transparency in product manufacturing.

  • Green Building and Construction: The architecture, construction, and real estate industries can ensure that the materials used support WELL™, LEED®, and Green Star® requirements.

  • Interior Design: Interior designers can use PHD-certified products to create safer indoor spaces with reduced toxic emissions.

  • Manufacturing: Manufacturers can increase their credibility by demonstrating ingredient transparency and compliance with global health regulations.

  • Furniture and Flooring: Manufacturers of furniture, flooring, and interior products can provide verified health performance.

  • Coatings and Paints: Paints, coatings, adhesives, and sealants can be assessed for VOC emissions and toxicity risks.

  • Textiles and Packaging: The textile and packaging industries can offer consumers verified, non-toxic, and environmentally friendly product options.


Is PHD Certification Recognized by Major Green Building Standards?

Yes, PHD Certification is recognized by leading global green building standards, including the WELL™ Building Standard, LEED®, Green Star®, and Green Globes®.

As these frameworks focus on material transparency, indoor air quality, and human health, PHD Certification provides a valuable advantage for projects seeking certification.

WELL™ recognizes PHD under key features, including VOC reduction and material safety, while LEED® accepts it under Material Ingredients credits. Green Star® and Green Globes® also allow PHD Certification to be used within the scope of toxicity reduction and sustainable product use.


What Certification Levels Are Available Under PHD?

PHD Certification uses the HealthRATE™ mark to classify products according to their health and safety performance.

The certification has four levels:

  • Bronze – Good: Indicates that the product has a good level of health performance under HealthRATE™.

  • Silver – Very Good: Indicates that the product has a very good level of health performance.

  • Gold – Excellent: Indicates that the product has an excellent level of health performance.

  • Platinum – World Leading: Indicates that the product has achieved the highest level in terms of health safety and toxicity performance.

Each level reflects the degree of ingredient transparency, the reduction of toxicity risks, and the impacts on human health.

Product ingredients must be disclosed with 100% transparency down to 100 ppm and undergo a third-party toxicological assessment.


How Is PHD Certification Obtained?

The PHD Certification process is a structured study that includes the transparent disclosure of product ingredients, the assessment of health risks, and an independent expert review.

The process generally consists of the following stages:

  1. Defining the Product Scope: The product, product group, manufacturing facility, and areas of use to be certified are defined.

  2. Disclosure of Ingredients: All components and chemical ingredients of the product are disclosed down to 100 ppm.

  3. Collection of Technical Documents: Safety data sheets, technical data sheets, test reports, VOC emission results, and supplier declarations are collected.

  4. Toxicological Assessment: Product ingredients are assessed in terms of toxicity risks, exposure during use, and potential impacts on human health.

  5. Independent Expert Review: The assessment results are subjected to peer review by independent toxicology experts.

  6. Determination of the HealthRATE™ Level: The Bronze, Silver, Gold, or Platinum level is determined according to the product’s health performance.

  7. Publication of the PHD Document: The approved Product Health Declaration™ document is published and made accessible to stakeholders.


Frequently Asked Questions

It assesses ingredient disclosure, toxicity risks, life cycle impacts, and health impacts during use, such as VOC emissions.

Manufacturers must disclose their ingredients with 100% transparency down to 100 parts per million (100 ppm) and undergo an independent, peer-reviewed toxicological assessment.

Yes, the Asthma & Allergy Sensitive™ certification is offered as an extension of the PHD process to assess products for individuals with sensitivities.

Yes, it can help meet strict material health standards by supporting compliance with global regulations such as the UN Globally Harmonized System (GHS) and EU REACH.

PHD Certification can support material health and transparency requirements under international green building systems such as the WELL™ Building Standard, LEED®, Green Star®, and Green Globes®.

The HealthRATE™ mark classifies products at Bronze (Good), Silver (Very Good), Gold (Excellent), and Platinum (World Leading) levels.

Companies can contact ERKE for the PHD Certification process, which includes material disclosure, review of technical documents, audits, and independent expert assessments.

You can contact us for detailed information.
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