8 Cancer Myths You Should Stop Believing Right Now
By Dr. David Samadi
In a matter of seconds, a cancer diagnosis can turn your world upside down overnight. It’s a time of uncertainty, tough decisions, and, unfortunately, a flood of misinformation. Well-meaning friends and internet searches may bombard you with advice—some helpful, but much of it misleading.
When it comes to cancer, knowledge is power. Separating fact from fiction ensures you make the best decisions for your health. Let’s break down eight of the most persistent cancer myths and uncover the truth.
1. Myth: Sugar “feeds” cancer
You’ve probably heard that eating sugar makes cancer grow faster. The reality? While cancer cells do consume more glucose than normal cells, no scientific evidence shows that eating sugar makes cancer worse.
All cells, including healthy ones, rely on glucose for energy. What’s more concerning is that excessive sugar intake may lead to obesity, which is linked to a higher risk of certain cancers. The key takeaway? Adopt and follow a well-balanced diet rich in nutrients rather than obsessing over sugar alone.
2. Myth: Artificial sweeteners cause cancer
Artificial sweeteners have been studied extensively, and no credible research has proven they cause human cancer. Some early studies raised concerns—like one linking the sweetener cyclamate to bladder cancer in rats—but subsequent research found no such risks in humans.
Today, sweeteners such as aspartame, sucralose (Splenda), and stevia are FDA-approved and considered safe when consumed in moderation, providing you with a safe and guilt-free alternative to sugar.
3. Myth: Cancer surgery spreads the disease
The idea that biopsies or cancer surgeries cause cancer to spread is a persistent myth. Surgeons follow strict protocols to prevent this from happening, using separate tools for different areas and taking extreme care when removing tumors, ensuring your safety and well-being.
If cancer spreads after surgery, it’s likely due to microscopic cancer cells that were already present—not because of the procedure itself. One of the most effective ways to treat certain cancers is surgery.
4. Myth: Herbal remedies can cure cancer
If an herbal supplement could cure cancer, we’d all know about it by now. While some natural products may help ease the side effects of cancer treatment, they are not a substitute for proven medical therapies.
Some herbal supplements can interfere with chemotherapy or radiation, making them less effective. Always talk to your doctor before taking any supplements during cancer treatment.
5. Myth: If a family member had cancer, I will too
Having a family history of cancer may increase your risk, but it’s far from a guarantee. Of all cancers, only about 5–10% have a direct link to inherited gene mutations. The vast majority—90–95%—are due to aging, lifestyle, and environmental exposures.
Even if you have a genetic predisposition, following healthy habits like eating healthy, nourishing foods, exercising regularly, and avoiding tobacco can lower your risk.
6. Myth: Hair dye causes cancer
There’s no solid evidence that dyeing your hair increases cancer risk. However, some studies suggest that hairdressers and barbers who are frequently exposed to chemical dyes may have a slightly higher risk of bladder cancer.
There’s no reason to panic for occasional users. If you’re concerned, consider switching to natural or ammonia-free dyes and wearing gloves when applying them.
7. Myth: Cell phones cause cancer
Cell phones emit low-frequency radio waves but have not been found to have enough energy to damage DNA or cause cancer. Despite ongoing studies, there’s no conclusive evidence linking cell phone use to brain tumors or other cancers.
If you want to be extra cautious, use speakerphone or hands-free options to limit prolonged exposure to your head.
8. Myth: Drug companies and the FDA are hiding a cure for cancer
The idea that big pharmaceutical companies are suppressing a cure for cancer is one of the most frustrating myths out there. The reality? Developing new cancer treatments is a long and complex process.
Before a drug reaches the public, it must undergo rigorous testing to ensure safety and effectiveness. While it’s true that research takes time, the progress in cancer treatment has been extraordinary. Over the past few decades, we’ve seen significant advancements in cancer research and treatment, that have significantly improved survival rates and a better quality of life for cancer patients. More people are surviving cancer than ever before, thanks to these advancements in medicine.
Final Thoughts
Cancer is overwhelming enough without the added stress of misinformation. By understanding the facts, you empower yourself on making smart and informed decisions about your health and treatment. If you ever have questions, remember that trusted medical professionals are always there to support and guide you—not internet myths.
When it comes to cancer, the truth is your best defense.
Dr. David Samadi is the Director of Men’s Health and Urologic Oncology at St. Francis Hospital in Long Island. He’s a renowned and highly successful board-certified Urologic Oncologist Expert and Robotic Surgeon in New York City, regarded as one of the leading prostate surgeons in the U.S., with a vast expertise in prostate cancer treatment and Robotic-Assisted Laparoscopic Prostatectomy. Dr. Samadi is a medical contributor to NewsMax TV and is also the author of two books, The Ultimate MANual, Dr. Samadi’s Guide to Men’s Health and Wellness, and Prostate Cancer, Now What? A Practical Guide to Treatment, Diagnosis, and Recovery, both available online both on Amazon and Barnes & Noble. Visit Dr. Samadi’s websites at robotic oncology and prostate cancer 911.