It is normal that crops contain very small amounts (traces) of elements that are used or present in the environment in which they are grown. Thanks to continuous advances in technology, experts are now able to detect certain substances in units as small as one billionth of a gram. For context, one billionth of a gram would be the equivalent of one drop of water in an Olympic-size swimming pool. These advances give scientists great confidence in their ability to ensure that food is safe.
For pesticide residues in food, regulatory authorities have strict rules. U.S. EPA and EFSA set daily exposure limits at least 100 times below levels shown to have no negative effect in safety studies.
Levels sometimes found in food are incredibly small and far from any level of concern. In fact, you could eat the unrealistic number of 450 boxes of breakfast cereals every 24 hours for the rest of your life and you would still be at a level of glyphosate exposure considered safe by the European Food Safety Agency.