Broadcast from KSQD, Santa Cruz on 6-11-2026: Dr. Dawn discusses fascia — the gelatinous network of sugary proteins, salts, and collagen bundles that has been known to acupuncturists and osteopaths for millennia but ignored in conventional medical training. New confocal laser endomicroscopy technology has finally visualized this "interstitium" as a fluid-filled space draining to lymph nodes, present throughout the GI tract, urinary bladder, dermis, and peribronchial tissues. The structure may play roles in cancer metastasis, edema, fibrosis, and mechanical tissue function. An emailer asks about elevated organic arsenic levels (from sardines) and ultra-filtered dairy. Dr. Dawn explains that arsenobetaine—the protein-bonded form found in fish, is harmless and passes through the body, while inorganic and methylated arsenic accumulate in bone and collagen-rich tissues. In a second question about the safety of ultrafiltered dairy, she notes ultra-filtered products may carry more microplastics from extensive plastic filters and tubing exposure, with aged cheese being particularly concentrated since water removal increases plastic density. An emailer asks about breast MRI contrast options. Dr. Dawn explains that breast MRI requires gadolinium contrast because tumors leak through their poorly-formed blood vessels, creating necessary visual contrast. She strongly recommends macrocyclic gadolinium (a stable birdcage structure) over the linear form, which slips into bones, skin, the brain's caudate nucleus, liver, and spleen for at least eight years and rarely, can cause nephrogenic systemic fibrosis. There is some suggestion it may trigger brain inflammation. She suggests listing linear gadolinium as a drug sensitivity in medical charts. Researchers harvested exosomes from semen. The exosomes evolved to help sperm penetrate egg barriers, making them ideal delivery vehicles for drugs too toxic for traditional administration. These bubble-like vesicles can penetrate the eye to distribute a manganese dioxide nanozyme compound (CMG) across ocular barriers to treat retinoblastoma, a childhood eye cancer typically requiring eyeball removal. Researchers used extracellular vesicles (effectively artificial exosomes) delivered via nasal spray to reverse brain aging in mice. The vesicles carried messenger RNA targeting the NLRP2 inflammasome, restoring mitochondrial activity in neurons and improving memory and recognition in treated animals. The nasal delivery route bypasses the blood-brain barrier, opening possibilities for treating cognitive deterioration without injections or surgical implants. An emailer reports his wife two inches shorter at a new Kaiser facility in another state. Dr. Dawn first considers measurement inconsistency (shoes on or off), then suggests evaluating for compression fractures, disc disease, and parathyroid tumors. She recommends a bone scan, C-terminal telopeptide testing to assess active bone breakdown, and intact PTH to rule out parathyroid pathology if osteoporosis is identified by DEXA scan. Dr. Dawn explores a new brain model addressing how 86 billion neurons store more memory than classical models predict. Astrocytes, previously known mainly for creating myelin sheaths, form tripartite synapses with neurons connecting to thousands of synapses simultaneously, communicating via calcium signaling and gliotransmitters. This could provide the higher-order coupling needed for our dense associative memory that pairwise synaptic connections cannot explain. Disrupting astrocyte-neuron connections in the hippocampus impairs both memory storage and retrieval, supporting this theoretical model. A Nature Neuroscience study found abdominal muscle contractions compress blood vessels connected to the brain and spine via the vertebral venous plexus, physically rocking the brain within the skull. This mechanical swishing may explain how exercise helps clear brain toxins and prevent neurodegenerative disorders, potentially leading to inflatable abdominal devices that could aid brain cleansing during sleep. Montelukast, the common asthma and allergy drug, has been found to block a protein hijacked by triple-negative breast cancer that converts immune cells into "sleeper agents" that clear paths for tumor invasion rather than attacking cancer. Dr. Dawn notes AI is increasingly identifying these drug repurposing opportunities by analyzing molecular shapes and receptor compatibility.
