We recommend eating predominantly raw nuts, as that is the most nutritious way to enjoy them. Raw nuts contain a lot of healthy fat, and when you buy them already roasted or toasted, many of those healthy fats can be changed into unhealthy fats because they have been exposed to high heat.
We recommend roasting and toasting your own nuts, if you enjoy them in that way, on a steel baking sheet at home. Cover the baking sheet with parchment paper and cover with the raw nut of your choice.
Generally, 10-20 minutes at a 160-200*F oven is a good rule of thumb.
Walnuts and flaxseeds have oils that are more sensitive to heat, they have a lower smoke point, and will therefore need less time and lower heat in the oven.
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