<human>:  How can one reduce mercury levels when grilling salmon?
<bot>: One way to reduce mercury levels when grilling salmon is to buy fresh, wild-caught salmon. Wild-caught salmon is likely to have lower levels of mercury than farm-raised salmon. Additionally, you can choose smaller and younger salmon, since smaller and younger fish tend to have lower levels of mercury. Finally, you can limit how often you consume and grill salmon to reduce your overall exposure to mercury.