Hemp seeds, or hemp hearts, are the seeds of the hemp plant, or Cannabis sativa. Although marijuana comes from the same plant, hemp seeds only contain a trace amount of THC, the active ingredient in marijuana, and they will not get you high. In fact, hemp seeds are safe and very healthy to eat. Hemp is actually one of the most widely utilized and diverse industrial crops in the world. Its fibers are considered the longest and most durable of all natural fibers, and it can even be grown without deadly herbicides and pesticides. Hemp seed oil, or hemp oil, is made by pressing hemp seeds.