Bamboo shoots caontain toxic substances which needs to be removed before consumption. I learn from my collegues people are following soaking principle to dissolve these harmful compounds. If you know anything about it, please let me know.
toxins in food products in general, are reduced significantly by soaking in fresh water. the water however needs to be changed and replaced with fresh one quite frequently (about 6 hours interval) for 48 hours.
Boiling is another means of detoxifying, but i haven't personally tried it.