Strengthened Six Flavor Rehmanni 

The little blue pills were a crop that Jiang He had planted when he had some free time.

It was a very common pill called the Six Flavor Rehmanni, and its main function was to treat yin deficiency and supplement the kidneys. 

Of course, Jiang He did not need kidney supplementation, even hating himself for an overly strong kidney!

As such, the reason he did not hold back from spending 3 million Farm Points on the Living Soil of the Nine Heavens to strengthen the Six Flavor Rehmanni was because that medicine curbed fatigue and restored stamina. 

Still, Jiang He was not sure as to why the Six Flavor Rehmanni would become little blue pills after he planted them, but he was not about to examine the cause either. He took it and its effects proved supreme anyway, and could match the Senzu Beans of a certain anime. 

One pill and it was full hp bar and stamina bar—it does not get any better.