answer:What did the ER say? What was her diagnosis in the discharge paperwork? What treatments did they provide? What tests did they run? I doubt her illness could be definitively linked to the formula. Keep the formula – don’t get rid of it. Keep your receipts. See if you can find a lab to test it (perhaps both for pathogens and nutritional makeup). Send the store a letter outlining the transaction, the product, the expiration, the date of purchase, the illness and subsequent hospital visit, diagnoses, etc. Send a copy to the local health department and better business bureau.