Hi, concerned father here, my son has been going to the grocery store 2-3 times per day and he only brings back Splenda stevia and soy sauce bottles. He does occasionally get groceries but mostly the above items. I noticed him use a syringe to take some soy sauce and put it on the stevia powder and then snort it. I didn’t call him out for it because I was concerned. If any of you know what this substance may be please respond in comments. Until then, should I call the police on him?