Concepts used to document allergies - feedback from Canadian implementers requested

Hello, Thus far for provincial implementations we are leveraging product and substance concepts to document allergens. We seek to align to FHIR concepts for allergy where applicable and required and also looking to leverage the IPS AllergyIntolerance value set which uses concepts from:all descendants of 762766007 | Edible substance (substance); all descendants of 406455002 | Allergen class (substance); all descendants of 425620007 | Metal (substance); all descendants of 373873005 | Pharmaceutical / biologic product (product).
The FHIR example terminology bindings for the allergeny intolerance code uses codes from all these hierchies.
Include codes from snomed.info/sct where concept is-a 418038007 (Propensity to adverse reactions to substance)
•Include codes from snomed.info/sct where concept is-a 267425008 (Lactose intolerance)
•Include codes from snomed.info/sct where concept is-a 29736007 (Syndrome of carbohydrate intolerance)
•Include codes from snomed.info/sct where concept is-a 340519003 (Lysine intolerance)
•Include codes from snomed.info/sct where concept is-a 190753003 (Sucrose intolerance)
•Include codes from snomed.info/sct where concept is-a 413427002 (Acquired fructose intolerance)
•Include codes from snomed.info/sct where concept is-a 716186003 (No known allergy)
Would recommend that there should be solicited feedback from other Ontario/CA stakeholders such as OHA members (hospitals), HIS vendors to fully assess potential impact of such change being proposed. Thank you.

The Allergies/Hypersensitivity and Intolerance Clinical Reference Group is seeking information on which countries are using the allergy to substance concepts e.g. 417532002 |Allergy to fish (finding)| rather than just documenting allergies using substance and product concepts.

If you could provide us with how you document allergies in your projects we will share that information with SNOMED International .
Please respond before December 20.