The herbs needed for the Bone Strengthening Pill are quite common; the main ingredient is tiger bone and ginseng, while the rest are relatively common medicinal herbs.
Compared to the True Essence Pill and the Jade Bone Ice Heart Pill, making the Bone Strengthening Pill is undoubtedly much easier.
Of course, this ease is relative; in fact, the Bone Strengthening Pill is also very valuable because the ginseng required needs to be Treasure Medicine.
It is said that the Bone Strengthening Pill is useful for Body Refining Realm warriors, yet there are hardly any in that realm who can afford it.
So, the Bone Strengthening Pill is mostly used by Postnatal Martial Artists below the Fifth Layer, and even then, only those from wealthy backgrounds can afford it; without strong financial reserves, Postnatal Martial Artists wouldn't dare splurge on such a thing.