Super sized super heroines

Hi everyone I've just read the first issue of Mary Marvel (From December 1945) and there's a story where three business men put growth hormones into the town's water system and it causes everyone to grow to about 10 feet tall (Except for them). This is just so that they can make money out of selling super sized items to the giant people. The hormone also effect Mary Batson (Mary Marvel in normal form) and causes her to grow like everyone else. But sadly when she becomes Mary Marvel she is normal size. But when it's all over and everyone gets the cure Mary herself forgets to take and when she becomes Mary Batson again she is still 10 feet tall. Unfortunately she also get she the cure. Oh well. As far as I know its the first comic to have true GTS content (Unless someone can prove me wrong)

The comic can be found here. http://www.comicbooksarchive.com/mary.php and click on Mary Marvel #1. When its downloaded its the 4th story. It called the Growth Epidemic.