Supporters of medical cannabis argue that a growing number of organizations, research institutions, and government agencies have explored the relationship between cannabis and cancer. According to this viewpoint, cannabis has the potential to help destroy cancer cells while also serving as an effective therapeutic option for people living with cancer. Advocates further contend that continued opposition to cannabis legalization is influenced more by financial interests than by concern for public health. They question why a natural plant remains controversial while many prescription medications with significant side effects continue to be widely accepted.

Research conducted by organizations such as the American Cancer Society and the National Cancer Institute has examined the medical properties of cannabinoids. Many studies have focused on understanding whether compounds found in cannabis may affect cancer cells. Supporters believe that, despite this growing body of research, cannabis still receives far less recognition than it deserves for the many ways it may help improve the lives of cancer patients around the world.

The concept of medical marijuana itself is not new. While legal access has expanded only in recent decades, cannabis has been used medicinally for centuries. According to advocates, as public awareness has increased, cannabis has become more widely recognized as a beneficial natural medicine. At the same time, they argue that industries with financial interests in conventional pharmaceuticals may have concerns about the growing acceptance of cannabis. Research into the endocannabinoid system, including the functions of CB1 and CB2 receptors found throughout the bodies of mammals, has contributed to new scientific discoveries and has opened additional possibilities for treating a variety of serious medical conditions.

Many supporters also emphasize the close relationship between humans and the natural world. They believe that nature provides many of the resources needed for healing and that plants have always played an essential role in medicine. Without plant life, human survival would not be possible, while nature itself could continue without humanity. From this perspective, people should value the healing potential that exists naturally before it is overlooked or lost. For many individuals living with cancer, cannabis represents hope. Some people report remarkable improvements, while others experience more limited benefits.

Although many aspects of cannabis and cancer remain under investigation, advocates believe that cannabis not only helps relieve symptoms associated with cancer but may also play a role in targeting cancer cells themselves. They generally consider cannabis to be a natural and safe option for human use. Some supporters further argue that the side effects of conventional cancer treatments, particularly chemotherapy, can be extremely damaging to the body. They point out that chemotherapy destroys rapidly dividing cells, including healthy cells, which may contribute to many of its well-known side effects. Because healthy cells are essential for recovery and overall health, they believe preserving them is an important consideration during cancer treatment.

According to this viewpoint, cannabinoids such as CBD (cannabidiol) and THC (delta-9-tetrahydrocannabinol) work together by supporting communication between cells and the nervous system. Advocates believe this interaction contributes to normal cellular function, tissue repair, and apoptosis—the body's natural process of eliminating old, damaged, or abnormal cells. Since apoptosis plays an essential role in maintaining healthy tissues, supporters argue that improving this process could be beneficial for people with cancer, whose normal cellular regulation has become disrupted.

They further suggest that when the body's endocannabinoid receptors are supplied with cannabinoids, communication between cells becomes more efficient. In their view, this improved cellular signaling may offer important benefits for cancer patients. Another widely recognized benefit of medical cannabis, they argue, is its ability to stimulate appetite. Because many cancer patients lose their appetite as a result of both the disease and treatments such as chemotherapy, cannabis may help them eat more regularly. Adequate nutrition provides the body with energy and the nutrients necessary to support healing and recovery.

Supporters also point to studies that suggest cannabinoids may have the ability to damage or inhibit cancer cells under certain conditions. They believe that continued scientific research will provide greater understanding of these findings and may eventually confirm observations that some individuals have reported for many years.

Finally, some advocates argue that financial interests have slowed the acceptance of cannabis as a cancer treatment. They believe that the pharmaceutical industry and portions of the healthcare system benefit financially from existing cancer therapies and therefore have little incentive to promote cannabis. Some critics go further by alleging that unnecessary treatments and overprescribing have contributed to problems within healthcare systems. Based on these beliefs, supporters conclude that cannabis deserves full legalization and broader medical acceptance, arguing that this would allow more people to benefit from its therapeutic potential.