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A Yale study has shed new light on how the brain creates awareness of our own actions, resolving a debate that began more than 130 years ago. Researchers found that awareness depends on multiple brain signals, including activity involved in planning movement and processing sensory feedback after an action. Neither signal worked alone, suggesting that both conscious intention and sensory perception contribute to our awareness of what we do. The study also found that reduced alertness, reflected by shrinking pupil size, was linked to declining awareness. Researchers suggest that being unaware of some actions may be a normal and useful feature that helps everyday activities run smoothly.

The largest genetic analysis of borderline personality disorder (BPD) to date has identified 11 genomic regions and nine genes potentially linked to the condition. Researchers analyzed genetic data from around 13,000 people with BPD and more than 1.1 million controls across 14 countries. The findings suggest that BPD has a complex, polygenic basis, with genetic risk factors overlapping with conditions including PTSD, depression, ADHD, suicidal behavior, COPD, and diabetes. Scientists estimate that the genetic factors studied explain about 17.3% of susceptibility to BPD. The research could improve understanding of the disorder's biology and guide future treatment strategies.

Researchers at KAIST have discovered that B cells and antibodies may play a crucial role in making immunotherapy more effective against aggressive brain tumors such as glioblastoma. The study found that anti-CTLA-4 treatment activates B-cell responses in lymph nodes that drain the brain, rather than relying only on T cells within the tumor. These B cells produce IgG antibodies that attach to glioma cells and help macrophages destroy them. In mouse models, removing B cells largely eliminated the treatment's benefits. The findings challenge the traditional T-cell-focused view of cancer immunotherapy and could guide new strategies for treating difficult-to-treat brain tumors.

New research suggests that parts of the ultra-processed food (UPF) industry use different strategies to challenge concerns about the health effects of these products. Researchers analyzing industry submissions found arguments that processing and additives are safe, nutrient content matters more than processing, and certain products should be separated from “unhealthy” UPFs. Some companies specifically framed their own products - such as plant-based alternatives, cereals, or fortified beverages, as healthier than other processed foods. Researchers describe this as a “my UPF is healthier than yours” strategy, which may shift attention away from broader concerns about ultra-processing and delay stronger public health action.

An international group of researchers is proposing a new approach to healthy aging that begins before a person is even born. The proposed PROSPER consortium would study how parental health, nutrition, sleep, early-life experiences, metabolism, and the gut microbiome may influence long-term health and resilience. Scientists argue that these early factors can leave lasting biological effects, potentially shaping how the body ages later in life. The initiative would bring together health data, biobanks, and international research to identify ways to improve lifelong health. Rather than waiting until middle age to address aging, researchers suggest building resilience from the earliest stages of life.

Researchers at the University of Minnesota Medical School have identified why pancreatic cancer can evade the immune system and spread more easily. The study found that some cancer cells shut down a process that normally makes them visible to immune cells. Researchers also discovered that regulatory T cells can prevent helpful CD4 T cells from attacking these hidden cancer cells. By combining a treatment that restores cancer-cell visibility with immunotherapy designed to activate CD4 helper T cells, scientists improved immune responses and reduced cancer spread in preclinical models. The findings highlight the important role of CD4 T cells and could help guide future pancreatic cancer immunotherapies.

Researchers have discovered a potential early molecular warning sign of skin damage that appears before visible changes occur. Using advanced light-based imaging techniques, scientists found that collagen’s organized molecular “handedness”, the precise arrangement that helps maintain tissue structure, can begin to break down while collagen levels and fiber architecture still appear normal. This suggests that skin aging and deterioration may begin at a deeper molecular level long before conventional imaging detects visible damage. The discovery could eventually lead to new methods for detecting skin damage earlier and developing treatments designed to protect collagen structure before significant deterioration occurs.

A new American Heart Association scientific statement suggests that most adults can safely consume up to 400 mg of caffeine daily, roughly equivalent to 3–5 cups of regular black coffee. However, much higher caffeine concentrations found in energy drinks and energy shots may increase blood pressure and raise the risk of abnormal heart rhythms. Energy shots can contain several times more caffeine per ounce than regular coffee. Researchers also note that caffeine affects people differently depending on genetics, age, medications, and health conditions. While moderate, unsweetened coffee may be linked to certain cardiovascular benefits, experts caution that high-dose caffeine products should be approached carefully.

A study analyzing data from more than 49,000 UK Biobank participants found that coffee type may be associated with biological aging. People who consumed filtered coffee generally showed markers linked to slower biological aging, including lower biological age-acceleration scores and longer telomeres. In contrast, instant coffee consumption was associated with patterns suggesting slightly faster biological aging. However, the differences were small, and the study was cross-sectional, meaning it cannot prove that coffee directly causes changes in aging. Researchers also noted that factors such as inflammation, metabolism, and kidney-related markers may partly explain the associations. More research is needed before dietary recommendations can be made.

The gut and brain constantly communicate through the gut-brain axis, a two-way network involving the vagus nerve, hormones, immune signals, and trillions of gut microbes. Research suggests that a diverse and healthy microbiome may influence mood, stress, sleep, memory, and cognitive function. Imbalances in gut bacteria have been associated with anxiety, depression, brain fog, and are being studied for possible links to neurological conditions. Experts recommend supporting gut health through a fibre-rich diet, fermented foods such as curd, regular exercise, adequate hydration, quality sleep, and stress management. Limiting ultra-processed foods and avoiding unnecessary antibiotics may also help maintain a healthier gut microbiome.