Taking more of a treatment often increases harms without increasing how much it helps.
It may seem to make sense that if an intervention is helpful, more of it may be even more helpful. But increasing the amount or intensity does not necessarily increase the benefits and may cause harm or unnecessary costs.
For example, short term psychotherapeutic interventions have been found to be just as effective, or more effective, than long term interventions. Spending more time in therapy may or may not cause harm, but it likely will result in potentially unnecessary costs (in time and money).
BEWARE of claims that more is better just because an interventions is believed to be helpful.
REMEMBER: More is not necessarily better.