Should There Be a Comma Before Thereby?

To give you a general answer to the question, a comma is necessary before “thereby” when it is used to introduce a phrase or clause entailing the effect of a prior mentioned condition. She has drunk too much coffee, thereby palpitating erratically.

Which is the correct use of thereby in a sentence thereby?

You use thereby to introduce an important result or consequence of the event or action you have just mentioned. Our bodies can sweat, thereby losing heat by evaporation.

Is it thereby or there by?

by that; by means of that. in that connection or relation: Thereby hangs a tale.