Very, very slight bitterness. So I add a tiny amount of stevia leaf extract powder (zero calorie sweetener) to offset the bitterness. You can get both stevia extract and granular lecithin at the larger Fred Meyer stores. However FM's brand of lecithin (Naturally Preferred) is only available as
*coarse* granules, which has terribly slow dissolution in hot tea. Get Now Foods #2280 lecithin fine granules at