Harvesting Dill Seeds is very easy

Take them off the the plant over a paper towel or paper plate, let them dry and bag them in a paper bag. Label them including the year you harvested them. 

If you are looking for supplements:

https://exclusivelyholistic.com/product-category/supplements/

Blog about Gut Health etc.   https://exclusivelyholistic.com/

Sourdough Instruction Book with Recipes: 

https://exclusivelyholistic.com/bake-whole-grain-sourdough-bread/