People are being advised not to consume 'Riviera Farms' branded baby spinach following a number of cases of possible food-related toxic reactions.
NSW Health advises the impacted baby spinach was sold through Costco with an expiry date of 16 December 2022.
The product is not safe to consume and people who have it should throw it out.
Initial investigations suggest the presence of an accidental contaminant in the food product.
NSW Health is working with the NSW Food Authority, as well as other jurisdictions, to investigate the issue further.
To date, NSW Health has identified nine people from four separate and unrelated households across Sydney who have required medical attention after developing poisoning soon after eating the product.
Anyone who is concerned about exposure to the spinach should call the Poisons Information Centre on 13 11 26. NSW Health urges anyone who experiences any unusual and severe symptoms to seek immediate medical attention by visiting their nearest emergency department. In the event of an emergency, call Triple Zero (000).
Reported symptoms can be severe, including:
The Poisons Information Centre is available 24/7 on 13 11 26 and can provide more information about poisons.