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Laetril, sometimes called B-17, is a substance made from compounds found in the seeds of fruits like apricots and other plants. It is often promoted as a natural or alternative cancer treatment. Despite the name B-17, it is not a vitamin or an approved medicine. Medical experts do not recognize Laetril as a safe or effective treatment for cancer.
Some people with cancer may look for alternative treatments like Laetril, hoping for options beyond standard care. However, scientific studies have not shown that Laetril can treat cancer or improve outcomes. In fact, it can be harmful because it may release cyanide, a toxic substance, when broken down in the body. Because of these safety concerns and lack of evidence, cancer specialists and organizations do not recommend using Laetril.
You might come across Laetril in books, websites, or from people promoting alternative medicine. It may be described as vitamin B17 or a natural cancer cure. Some clinics or practitioners may offer it as part of detox or immune support programs. It’s important to know that these claims are not supported by reliable scientific evidence. If you hear about Laetril, it’s a good idea to discuss it with your healthcare provider to understand the facts and risks.
Laetril is sometimes called vitamin B17, but it is not a true vitamin or essential nutrient. It is not part of any approved cancer treatment plan. Seeing the term does not mean your doctor supports or recommends it. It also does not mean that it is safe or effective. Avoid interpreting mentions of Laetril as endorsements or proven therapies.
If you are curious about Laetril or other alternative treatments, ask your healthcare team about the evidence behind them. You can ask about possible risks, interactions with your current treatments, and whether there are safer, proven options to support your care. Open conversations can help you make informed decisions and avoid treatments that might cause harm.
This information is meant to help you understand what Laetril (B-17) is and why it is not recommended for cancer treatment. It is not medical advice and cannot replace personalized guidance from your doctors. If you have questions or concerns about your treatment options, the best step is to talk openly with your cancer care team. They can help you find safe and effective treatments based on your individual situation.
Public source information used for this glossary entry includes: