Nitrates and nitrites in food.
D005503:Food Additives / Q000009:adverse effects*; D005519:Food Preservation; D006261:Headache / Q000139:chemically induced; D006801:Humans; D008708:Methemoglobinemia / Q000139:chemically induced; D009369:Neoplasms / Q000139:chemically induced; D009566:Nitrates / Q000009:adverse effects* / Q000378:metabolism; D009573:Nitrites / Q000009:adverse effects* / Q000378:metabolism; D009602:Nitrosamines / Q000378:metabolism
D005503:Food Additives; D009566:Nitrates; D009573:Nitrites; D009602:Nitrosamines