4. Is there any gluten substance in the black pepper extract powder 95% which you provide? The black pepper extract powder 95% that we supply is wheat-free, gluten-free, dairy-free, peanut-free, soy-free. Dipak Ranjan Sahoo 5. Does this product contain E. coli & salmonella? 3. What method is used for Identification Black Pepper Extract Powder 95%?