How long does it take to become poisonous after consuming sodium nitrite?

Sodium nitrite is a commonly used food additive used for preservation and coloring. If taken in excess, it can cause harm to human health. Generally speaking, the toxic dose of sodium nitrite is about 5 mg per kilogram of body weight, but the specific poisoning time depends on the amount ingested and individual differences. In general, long-term ingestion of large amounts of sodium nitrite may lead to chronic poisoning, manifesting as headache, dizziness, nausea, vomiting, diarrhea and other symptoms. Therefore, it is recommended to consume foods containing sodium nitrite in moderation and not to overeat.