- It’s unwise to rely on dietary supplements for cancer risk reduction; some might even heighten risks.
- Experts recommend obtaining nutrients from natural sources like fruits, vegetables, and whole grains instead.
- Consider lifestyle adjustments, such as reducing alcohol intake and engaging in regular exercise to lessen cancer risk.
The key takeaway from this discussion? Supplements won’t help prevent cancer. The World Cancer Research Fund emphasizes that it’s better to derive nutrients from food rather than pills. “In most cases, studies on supplements don’t yield positive results,” notes a senior oncology dietitian from Dana-Farber Cancer Institute. Sure, supplements might fill specific nutritional gaps for individuals, but they don’t play a role in cancer prevention.
That said, the temptation to grab a supplement is quite understandable. “I mean, it’s often easier to swallow a pill than, say, think about adding those extra servings of fruits and veggies into your day,” she adds. Let’s dive into five popular supplements that claim to help with cancer prevention and what alternatives you should consider.
1. Beta Carotene
This antioxidant pigment, part of the carotenoid family, is found in foods like carrots, sweet potatoes, and dark leafy greens. Your body transforms beta carotene into vitamin A. Research initially sparked interest in beta carotene because those who consume more fruits and vegetables seemed to have lower lung cancer rates. However, this nutrient is just one of many in a much larger picture, as the diet composition plays a crucial role.
Additionally, studies found that smokers taking beta carotene supplements had higher lung cancer rates, leading to the research being halted. “It just makes sense that when we isolate a nutrient and consume it in unnatural amounts, things can go sideways,” says the dietitian.
2. Vitamin C
Vitamin C has long been associated with immune support. Nonetheless, despite decades of interest in its potential to enhance immunity, not much science firmly backs this notion. In fact, there’s insufficient evidence to support the need for daily vitamin C supplements. It’s water-soluble, meaning excess amounts are typically excreted. Eating vitamin C-rich foods is encouraged, as they are linked to a lower occurrence of various cancers.
3. Vitamin E
Like beta carotene, the benefits of vitamin E supplements are questionable. While touted for their antioxidant properties, studies yield mixed results regarding their efficacy in cancer prevention. In excessive amounts, particularly regarding prostate cancer, high-dose vitamin E could actually pose risks.
4. Vitamin D
More of a hormone than a vitamin, vitamin D enhances calcium absorption and is crucial for bone health. We get it from food and produce it through sun exposure. Although sufficient vitamin D is vital for our overall health, there’s no clear evidence showing that it lowers cancer risk in humans, even if animal studies suggest some anticancer properties. If your D levels seem low, especially in winter months in northern regions, consulting with a healthcare provider could be wise.
5. Calcium
Calcium is essential for bone health and various bodily functions. While healthcare providers may recommend supplements in certain scenarios, taking more than 1,000 milligrams daily from supplements has been linked to higher cancer mortality rates. Why? The body may absorb dietary calcium differently than that from supplements.
Other Strategies to Reduce Cancer Risk
Pills won’t solve the problem of cancer prevention. “Dietary and lifestyle choices have the greatest impact on reducing cancer risk and supporting survivors,” states the dietitian. In fact, 40% of cancer cases could be preventable, according to the WCRF. Here are five recommendations to consider:
- Maintain a healthy weight: Carrying excess weight can lead to chronic inflammation, raising cancer risks.
- Stay physically active: Engaging in regular exercise helps manage weight. Aim for moderate to vigorous activity weekly.
- Include whole grains, vegetables, fruits, and beans: These foods offer essential nutrients that may help prevent cancer.
- Limit consumption of fast foods and sugars: The connection between these foods and increased cancer risks is clear, particularly regarding colorectal cancer.
- Limit alcohol intake and avoid smoking: Both practices are linked to various cancers. Guidelines suggest moderation for alcohol, while smoking significantly raises cancer risks.
One important note from the WCRF: “Avoid supplements for cancer prevention.” The experts have clearly stated their position.
Our Expert Take
It’s not advisable to use dietary supplements to lower cancer risk. Many offer no real benefits, and some might, rather paradoxically, increase your risk. A balanced diet filled with natural food sources is the safe route. This kind of diet loaded with plant-based foods has protective qualities against cancer. If you believe you need a supplement due to a specific health need, consult with a healthcare provider for advice.
