Ignorantly have been feeding my toddler salami on the daily

My 4yo toddler LOVES salami. He eats it multiple days a week, maybe 10-12 rounds of Columbus Low Sodium salami I buy from Trader Joe's. I just read about the link between nitrates and colorectal cancer, and I'm so worried that I've impacted his developing digestive system. I am always so anxious about his health, and this has me beside myself. I suppose Iooking for advice on how to cut this from his diet. He asks for it ALL the time.. it's his favorite food.. and he's so happy when he's eating it. Is it best to explain to him that it's not a healthy option? I hate the idea of healthy vs unhealthy, but I know he will inquire.. trying to figure out how to explain it to him. Thanks in advance.. I'm really disappointed in myself.