Order Carcinogen Kit

Carcinogens are substances, agents, or exposures that can lead to cancer by causing changes (mutations) in a cell’s DNA or promoting abnormal cell growth. They may be chemical, physical, or biological in nature.

Shop Now

Types of Carcinogens

1. Chemical Carcinogens

  • Polycyclic aromatic hydrocarbons (PAHs) – found in tobacco smoke, grilled meat
  • Aflatoxins – toxins produced by Aspergillus species in contaminated grains and nuts
  • Asbestos – used in construction materials; linked to mesothelioma
  • Formaldehyde – used in building materials and industrial processes
  • Benzene – found in industrial solvents and cigarette smoke

2. Physical Carcinogens

  • Ultraviolet (UV) radiation – from the sun; causes skin cancer
  • Ionizing radiation – from X-rays or radioactive materials; associated with various cancers

3. Biological Carcinogens

  • Oncogenic viruses:
    • Human papillomavirus (HPV) – cervical cancer
    • Hepatitis B and C viruses – liver cancer
    • Epstein-Barr virus (EBV) – nasopharyngeal carcinoma, some lymphomas
  • Bacteria:
    • Helicobacter pylori – stomach cancer
  • Parasites:
    • Schistosoma haematobium – bladder cancer

Mechanisms of Carcinogenesis

Initiation

DNA damage or mutation by carcinogens

Promotion

clonal expansion of mutated cells

Progression

additional mutations, leading to invasive and metastatic cancer

Carcinogen Classification by IARC (International Agency for Research on Cancer)

  • Group 1 – Carcinogenic to humans (e.g., tobacco, asbestos, processed meat)
  • Group 2A – Probably carcinogenic (e.g., red meat, glyphosate)
  • Group 2B – Possibly carcinogenic (e.g., mobile phone radiation)
  • Group 3 – Not classifiable
  • Group 4 – Probably not carcinogenic (only a few substances in this group)

Prevention and Regulation

  • Avoidance of known carcinogens (e.g., smoking cessation, sun protection)
  • Use of protective equipment in workplaces
  • Regulations on industrial emissions, food additives, and cosmetics
  • Cancer screening programs for early detection

Group 1 Carcinogens (Confirmed to cause cancer in humans)

Chemical Carcinogens

  • Tobacco smoke (including secondhand smoke)
  • Asbestos
  • Arsenic (in drinking water)
  • Benzene
  • Formaldehyde
  • Aflatoxins (from moldy grains/nuts)
  • Vinyl chloride (used in PVC production)
  • Ethylene oxide
  • Cadmium and cadmium compounds
  • Chromium (VI) compounds
  • Silica dust (crystalline)
  • Diesel engine exhaust
  • 1,3-Butadiene (used in rubber production)

Physical Carcinogens

  • Ultraviolet (UV) radiation (from sun or tanning beds)
  • Ionizing radiation (X-rays, gamma rays, radon gas)

Biological Carcinogens

  • Human papillomavirus (HPV) – cervical, throat cancers
  • Hepatitis B and C viruses – liver cancer
  • Epstein-Barr virus (EBV) – lymphomas, nasopharyngeal cancer
  • Helicobacter pylori – stomach cancer
  • Schistosoma haematobium – bladder cancer
  • Human T-cell leukemia virus-1 (HTLV-1)

Lifestyle-Related Carcinogens

  • Alcoholic beverages
  • Processed meats (e.g., bacon, sausages)
  • Coal tar and coal-tar pitch
  • Opium (smoked or ingested)

Notable Group 2A (Probably Carcinogenic)

  • Red meat
  • Glyphosate (herbicide)
  • Anabolic steroids
  • Night shift work (disrupting circadian rhythm)
  • Frying emissions (from high-heat cooking)