having strong gut health so you can absorb minerals and vitamins, along with proper nutrition is the best way to have strong test levels. also sticking to organic and whole foods.
if you cannot absorb boron and zinc you will not be able to produce testosterone in the first place. hence why any good natural T booster will have those 2 ingredients always. also consuming pesticides that are in non-organic foods will destroy your gut
so fix that first before anything! workouts are the icing