Robert F. Kennedy Jr. on health: what the evidence says · JRE #1999

What the evidence says 01 / RECORD

Kennedy claimed Wi-Fi radiation opens the blood-brain barrier. A 2026 scoping review in Physics in Medicine & Biology examined 35 experimental and clinical studies on radiofrequency electromagnetic field (RF-EMF) exposure and blood-brain barrier permeability, spanning roughly 900 MHz to higher frequencies used in wireless systems; seventeen studies reported increased permeability or molecular changes while eighteen found no effect, and studies with the strictest temperature controls and exposure measurement tended to find no effect. The review's authors concluded that current evidence does not establish a causal link between RF-EMF exposure and blood-brain barrier disruption, and that human data remain sparse and do not clearly separate heating effects from other mechanisms. The U.S. National Cancer Institute states that radiofrequency radiation from devices such as cell phones, which fall in the same non-ionizing frequency range used by Wi-Fi equipment, has too little energy to damage DNA, and that the only consistently established biological effect in humans is mild localized heating, with no other clearly established dangerous health effects. Wi-Fi transmitters operate at power levels far below those used in most of the reviewed animal and cell-culture studies. As of mid-2026, the claim that Wi-Fi-level radiofrequency exposure opens the human blood-brain barrier is not supported by the weight of current evidence, which remains mixed only at higher, non-Wi-Fi exposure levels and inconclusive in humans.