This is all dependant upon how they are made. This no-mayo tuna salad is much healthier than a mayo-based tuna salad or chicken salad. Here's what to consider when determining whether a salad is healthy or not: what is the dressing made from (olive oil is always best), are there vegetables in the salad, and is there some source of fiber in the salad (chickpeas, vegetables, greens, whole grains).