Garlic is eaten, chopped, crushed, or chewed. When garlic tissue is damaged, enzymes convert compounds inside the garlic bulb into sulfur-containing bioactive molecules. One of the most important compounds formed is allicin.
Other important sulfur compounds released include:
These compounds are believed to be responsible for many of garlic’s biological effects.
After digestion, garlic compounds are absorbed through the intestinal lining into the bloodstream.
Once in circulation, these compounds travel throughout the body and can enter tissues and cells, including abnormal or cancerous cells.
Research suggests garlic sulfur compounds may:
This allows the compounds to begin influencing intracellular pathways linked to cancer cell growth and death.
Garlic-derived sulfur compounds enter cancer cells and begin interacting with cellular signaling systems.
Inside the cancer cell, they may:
Cancer cells often survive because their internal “death signals” are suppressed. Garlic compounds may help reactivate these suppressed pathways.
Garlic compounds may shift the balance from cell survival toward cell death (apoptosis).
This occurs through changes in proteins involved in apoptosis regulation.
The balance between these proteins is extremely important.
Garlic compounds may increase the activity of apoptosis-promoting pathways while weakening pathways that help cancer cells survive.
The mitochondria are the energy-producing structures inside the cell.
Garlic compounds may disrupt mitochondrial stability inside cancer cells by causing:
Cytochrome c release is a critical event in the intrinsic apoptosis pathway.
Once cytochrome c escapes from the mitochondria into the cytoplasm, it signals the cell to begin programmed death processes.
Cytochrome c helps activate a cascade of enzymes called caspases.
Important caspases involved include:
Acts as an initiator caspase and starts the apoptosis signaling cascade.
Known as an “executioner caspase,” it breaks down structural and regulatory proteins inside the cell.
These enzymes dismantle the cancer cell in a controlled and organized manner.
The cancer cell undergoes controlled self-destruction.
During apoptosis:
These fragments are then removed by immune cells without causing widespread inflammation.
This is different from necrosis, which is uncontrolled cell death that damages surrounding tissue.
Garlic contains sulfur-based bioactive compounds that may influence multiple pathways involved in apoptosis.
Research in laboratory and cell studies shows garlic compounds can:
