Does lecithin works after expired date?

What do you expect lecithin to do? Did a doctor prescribe it? It is unlikely that even unexpired Lecithin will do you any good, For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.

At the expiration date the potency begins to fall below 100% of the listed amount. I therefore suggest you dispose of the expired lecithin and purchase new lecithin. I wish you well with your health!