Gigantification

Gigantification refers to the process of enhancing the size of organic beings via artificial means.

Overview
Gigantification is the procedure to turn naturally born regular-sized people into giants via the means of scientific methods. To date, the perfected version of gigantification has been considered to be impossible to achieve. This is a long-sought process to mankind, as Caesar Clown noted that any scientist who can achieve it would be famed and sought after.

By Caesar's claim, outright turning people into giants without any side-effects is impossible by scientific means. He believes that taking advantage of children's growth by using drugs is a more practical process, although this would reduce their lifespan from the strain, and even Caesar admits his inability to bypass this cost of sustained health and longevity.

History
For centuries, many of the most brilliant minds have sought to create the gigantification process, but none has reached a breakthrough.

Recent Marines Researches
Vegapunk, the leading scientist of the Marines and heralded a genius whose inventions are 500 years ahead of current times, has attempted at gigantfication, but even he could not succeed.

Caesar Clown, Vegapunk's former colleague and second-to-best rival, managed to achieve something of gigantification, which is mainly to force a large quantities of dangerous drugs and chemicals down children who are in their growth period. Although this actually turned his test subjects into giants, this also resulted in many side effects that would lead to their demise in about five years. Because of his unethical method that comes with lethal side-effects, the Marines refused to accept his experiments.

Caesar's Researches
After Caesar was kicked out of the Marines, he continued with his unethical experiments on gigantification, because of the accompanying fame of success. The Yonko, Charlotte Linlin, commissioned him to this research, funding him, in order to fulfill her dream of having a tea party with her family of all races on eye-level (her size is comparable to that of a giant, surpassing her children and husbands). Caesar, however, only experimented on children in their growth periods, and cannot work out on the side-effect of deteriorating health and lifespan. He long since accepted that it is impossible to create a procedure to turn normal humans of any age into giants without any adversity, but repeatedly lied to Linlin by saying he needs more funding to achieve the breakthrough. He only spent a minimal effort on experimenting on the children, and the rest of the excess funds on a hedonistic lifestyle.

After Monkey D. Luffy and Trafalgar Law destroyed his lab in Punk Hazard, Caesar used this as an excuse to Linlin on how his "fruits of labor" have been destroyed and that he cannot reproduce it without the state-of-the-art laboratory built by the World Government. The Yonko, however, has long since recreated a replica of the lab via blueprints she acquired, and offered more funding for the scientist to replicate what was destroyed, and place the finishing touches to it. Having his lies turned on him, Caesar told her he could have the gigantification drug within two weeks at most, and instead was desperately thinking of a way to escape his situation. Linlin's first son, Charlotte Perospero, gave the scientist the two weeks to bring out what was promised, or face death.

Trivia

 * When Monkey D. Luffy utilized his Gear Third to expand his stomach like a vulcanized balloon, Sengoku referred this as "Gigantification".