Dietary supplement intake in women with breast cancer before and after diagnosis: results from the SUCCESS C trial.

Our assessment

This study analyzed data from the SUCCESS C trial, a randomized controlled trial that looked at lifestyle interventions in women with newly diagnosed, intermediate- to high-risk breast cancer. The researchers specifically examined how many women took dietary supplements before and after their diagnosis [2024].

How it works

The study found that supplement use was common among women both before and after their breast cancer diagnosis. What this means for you is that many people turn to supplements during a cancer journey, but the researchers note that current treatment guidelines generally do not recommend them because there is little evidence they are beneficial for breast cancer patients [2024].

Safety profile

Data not available on side effects from this specific study. The study focused on the prevalence of supplement use, not on safety outcomes or adverse events.

Our recommendation

Because this study highlights that supplement use is widespread but not supported by strong evidence for breast cancer patients, the key takeaway is to always discuss any supplements you are taking or considering with your oncology team. Do not assume that "natural" means safe during treatment, as some supplements can interfere with chemotherapy or other medications [2024].