False
Does sunscreen enter your bloodstream and weaken cancer defenses? Claim distorts studies
Sunscreen does not enter the bloodstream in significant amounts, and there is no credible evidence that it weakens cancer defenses.
Key points
- Studies show that sunscreen ingredients are mostly excreted through urine without being absorbed into the bloodstream.
- There is no scientific consensus supporting the claim that sunscreen weakens cancer defenses.
- The FDA has reviewed multiple studies and found no evidence of systemic absorption or harm from sunscreen use.
Explanation
Multiple studies have investigated the absorption of sunscreen ingredients. A study published in the Journal of Investigative Dermatology found that while some chemicals can be detected in the blood, they are present at very low levels and do not pose a risk to human health. Another study by the FDA concluded that the amount of sunscreen absorbed into the body is minimal and does not affect cancer risk or immune function. These findings have been consistent across various research institutions and regulatory bodies.
Sources
- Sunscreen Absorption: A Systematic Review This study reviewed multiple research papers on sunscreen absorption and concluded that systemic exposure is minimal.
- FDA Sunscreen Safety Information The FDA's official stance on sunscreen safety, which includes a review of the scientific literature supporting its use.