I do take tryptophan at bedtime... I,too find that onlyabstinance works for sweet cravings. Sometimes I have a little sweet potato with dinner and that seems fine as far as cravings go. I've done it at lunch too and that worked but I wouldn't want to eat sweet potatoes every lunch. Seems it could set me off. Nothing is worth that. I really like being craving free. 5-http makes me cranky and critical. Knave to go for the Trp itself.