Sesame seeds? You're thinking of poppy seeds, not sesame seeds. Poppy seeds come from opium poppies and they have very, very small amounts of opium in them. If the test you're taking is turned down low enough to detect poppy seeds--and the current federal screening cutoff for opiates is high enough not to detect poppy seeds--they stay in your system three days. Sesame seeds don't have drugs in them. You can eat them by the pound if you like.
2 days
It can stay in your system for 3 days.
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If you eat enough poppy seed muffins you will test positive for poppy, just lay off the poppy for about a week FFS!
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