What "diet bread" from the 1970s am I thinking about?

I remember back in the '70s, there was this one particular brand of diet bread that had wood pulp as one of its ingredients. I can’t for the live of me remember what the name of the bread was. Does anyone remember?

Nature’s Way.

The bread that ignited the fiber fad. Here it is:

Apparently the company that made the stuff got let off the hook for false advertising:

A lot of companies did this, so there is a lot more than one answer.