Hello Diane,

1. About selenium, Recommended Dietary Allowance (RDA) daily minimum requirement is 70 and 55 micrograms per day for men and women. However, some literature sets the minimum requirement at 90 mcg daily per adult. The selenium content of plant foods varies a lot since it depends on the amount in the soil. However your needs should be met through food if you eat a balanced plant-based diet. For example, 3 to 4 Brazil nuts provide about 420 μg of selenium, 90 g (3 oz) of canned tuna contains 70 μg, and a slice of whole wheat bread contains 10 μg.

2. About flaxseed oil, you should keep it in the fridge and use it only for seasoning (do not cook with it). You may be interested in following article: https://www.soscuisine.com/blog/flax-chia-hemp-seeds/