Where this product made?

Country of origin not specified.

How to use ginkgo biloba and what is the side effects

For adults, take one (1) softgel two times daily, or as directed by physician.

Warning: If you are pregnant, nursing, taking any medications, planing any medical or surgical procedure or have any medical condition, consult your doctor before use. Discontinue use and consult your doctor if any adverse reactions occur. Not intended for persons under the age of 18.

if i want to buy 10 bottles, will you discount for me?

Yes. If you buy 10 bottles, you'll get them for $19.39 each.