Retinoids such as retinol and retinal are widely used in cosmetic formulations, particularly in skincare products targeting anti-aging and skin renewal.
In Canada, these ingredients are subject to specific restrictions under the Cosmetic Ingredient Hotlist. Recent updates have introduced new limits and clarified how these substances must be assessed in cosmetic products.
For companies operating in Canada, understanding these requirements is essential to ensure compliance and avoid reformulation risks.
Canada’s Cosmetic Ingredient Hotlist: a key reference
The Cosmetic Ingredient Hotlist is a regulatory tool used by Health Canada to identify substances that are prohibited or restricted in cosmetic products.
Unlike a static regulation, the Hotlist is regularly updated to reflect new scientific data and regulatory priorities.
The February 2025 update introduced important changes for retinoids, including:
- The addition of retinal (retinaldehyde) as a restricted ingredient
- Revised limits for retinol and its esters
Retinal (retinaldehyde): new restrictions
Retinal is now listed as a restricted ingredient in the Hotlist, with specific concentration limits depending on product use.
Maximum concentrations:
- Leave-on products intended for full-body application: 0.01%
- All other cosmetics: 0.05%
These limits reflect concerns related to potential irritation and systemic exposure.
Retinol and its esters: revised limits
Health Canada has also revised the limits for retinol and its esters, particularly for products intended for full-body application.
Maximum concentrations:
- Leave-on products intended for full-body application: 0.2% total retinol equivalents
- All other cosmetics: 1.0% total retinol equivalents
This revision aims to ensure that overall exposure to vitamin A derivatives remains within acceptable safety thresholds.
Understanding “total retinol equivalents”
Compliance with the Hotlist is not based solely on the concentration of a single ingredient.
Instead, companies must calculate the total retinol equivalents, which includes all relevant vitamin A derivatives present in the formulation.
This requires:
- Identifying all retinoids in the formula
- Applying appropriate conversion factors where necessary
- Verifying the final total against the applicable limit
Hemp-derived ingredients: conditions to consider
The Hotlist also includes specific conditions for certain Cannabis spp. (hemp) derivatives, such as:
- Cannabis sativa seed oil
- Hemp seed oil
- Hydrolyzed hemp seed protein
These ingredients are permitted in cosmetics provided that:
- They do not contain isolated or concentrated phytocannabinoids
- They do not include synthetic duplicates of such compounds
This requires careful supplier verification and documentation.
Practical implications for companies
These requirements have direct consequences for product development and compliance.
Companies should:
- Review formulations containing retinoids
- Confirm product categorization (especially full-body leave-on products)
- Calculate total retinol equivalents accurately
- Verify supplier specifications for hemp-derived ingredients
- Align internal processes across R&D, regulatory, and QA teams
Key takeaway
Retinoids remain valuable ingredients in cosmetic formulations, but their use in Canada is strictly regulated.
Understanding concentration limits, product categorization, and calculation methods is essential to maintain compliance and avoid unexpected reformulation.
Going further
If you need support verifying your formulations against Canadian regulatory requirements, our regulatory team can assist you.
👉 Contact us | 👉 Subscribe to the newsletter
Retinoids such as retinol and retinal are widely used in cosmetic formulations, particularly in skincare products targeting anti-aging and skin renewal.
In Canada, these ingredients are subject to specific restrictions under the Cosmetic Ingredient Hotlist. Recent updates have introduced new limits and clarified how these substances must be assessed in cosmetic products.
For companies operating in Canada, understanding these requirements is essential to ensure compliance and avoid reformulation risks.
Canada’s Cosmetic Ingredient Hotlist: a key reference
The Cosmetic Ingredient Hotlist is a regulatory tool used by Health Canada to identify substances that are prohibited or restricted in cosmetic products.
Unlike a static regulation, the Hotlist is regularly updated to reflect new scientific data and regulatory priorities.
The February 2025 update introduced important changes for retinoids, including:
- The addition of retinal (retinaldehyde) as a restricted ingredient
- Revised limits for retinol and its esters
Retinal (retinaldehyde): new restrictions
Retinal is now listed as a restricted ingredient in the Hotlist, with specific concentration limits depending on product use.
Maximum concentrations:
- Leave-on products intended for full-body application: 0.01%
- All other cosmetics: 0.05%
These limits reflect concerns related to potential irritation and systemic exposure.
Retinol and its esters: revised limits
Health Canada has also revised the limits for retinol and its esters, particularly for products intended for full-body application.
Maximum concentrations:
- Leave-on products intended for full-body application: 0.2% total retinol equivalents
- All other cosmetics: 1.0% total retinol equivalents
This revision aims to ensure that overall exposure to vitamin A derivatives remains within acceptable safety thresholds.
Understanding “total retinol equivalents”
Compliance with the Hotlist is not based solely on the concentration of a single ingredient.
Instead, companies must calculate the total retinol equivalents, which includes all relevant vitamin A derivatives present in the formulation.
This requires:
- Identifying all retinoids in the formula
- Applying appropriate conversion factors where necessary
- Verifying the final total against the applicable limit
Hemp-derived ingredients: conditions to consider
The Hotlist also includes specific conditions for certain Cannabis spp. (hemp) derivatives, such as:
- Cannabis sativa seed oil
- Hemp seed oil
- Hydrolyzed hemp seed protein
These ingredients are permitted in cosmetics provided that:
- They do not contain isolated or concentrated phytocannabinoids
- They do not include synthetic duplicates of such compounds
This requires careful supplier verification and documentation.
Practical implications for companies
These requirements have direct consequences for product development and compliance.
Companies should:
- Review formulations containing retinoids
- Confirm product categorization (especially full-body leave-on products)
- Calculate total retinol equivalents accurately
- Verify supplier specifications for hemp-derived ingredients
- Align internal processes across R&D, regulatory, and QA teams
Key takeaway
Retinoids remain valuable ingredients in cosmetic formulations, but their use in Canada is strictly regulated.
Understanding concentration limits, product categorization, and calculation methods is essential to maintain compliance and avoid unexpected reformulation.
Going further
If you need support verifying your formulations against Canadian regulatory requirements, our regulatory team can assist you.
👉 Contact us | 👉 Subscribe to the newsletter
