Pesquisadores questionam níveis de vitamina B12 e sua relação com o câncer

27 de maio de 2026

Reportado por IA

Cientistas estão levantando novas questões sobre a relação entre a vitamina B12 e o risco de câncer. Embora já se saiba há muito tempo que a deficiência aumenta os perigos, estudos recentes sugerem que níveis muito altos também podem desempenhar um papel.

A vitamina B12 auxilia na produção de glóbulos vermelhos, no reparo do DNA e na função nervosa. Ela ocorre naturalmente em carnes, peixes, ovos e laticínios, sendo que algumas pessoas dependem de alimentos fortificados ou suplementos. A maioria dos indivíduos com dietas variadas obtém o suficiente, embora veganos, idosos e pessoas com problemas de absorção possam precisar de uma ingestão extra.

Doctors warn biotin supplements can interfere with some cancer-related blood tests

08 de maio de 2026 Reportado por IA Imagem gerada por IA Verificado

Some cancer patients take biotin supplements hoping to improve hair and nail growth, but specialists at Ohio State University Wexner Medical Center warn that high-dose biotin can interfere with certain blood tests used in cancer monitoring, potentially producing misleading results that could affect follow-up care.

Study finds lower normal B12 levels tied to brain changes

A University of California San Francisco study has linked lower but still normal levels of active vitamin B12 to slower thinking and white matter damage in healthy older adults. The research, published in Annals of Neurology in 2025, suggests current guidelines may miss early neurological risks. Researchers examined 231 participants with an average age of 71.

Study links vitamin B12 and folate to fatigue

29 de maio de 2026 Reportado por IA

A new Japanese study has connected deficiencies in vitamin B12 and folate to increased fatigue and lower motivation in otherwise healthy adults. The research examined blood markers and self-reported symptoms in around 600 participants.

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Study of young lung cancer patients finds unexpectedly high diet-quality scores; researchers probe possible pesticide exposure

Preliminary research from USC Norris Comprehensive Cancer Center, presented at the American Association for Cancer Research (AACR) annual meeting, found that non-smokers diagnosed with lung cancer before age 50 reported eating more fruits, vegetables and whole grains—and had higher overall Healthy Eating Index scores—than the U.S. population average. The researchers emphasized that the results do not prove diet causes lung cancer and said a possible explanation could involve environmental exposures such as pesticides, a hypothesis that requires direct testing.

Researchers discover virus in gut bacteria tied to colorectal cancer

22 de abril de 2026 Reportado por IA

Scientists at the University of Southern Denmark and Odense University Hospital have identified a previously unknown virus inside the common gut bacterium Bacteroides fragilis that appears more frequently in people with colorectal cancer. The finding, detailed by lead researcher Flemming Damgaard, resolves a long-standing paradox since the bacterium is also present in healthy individuals. While the link is strong, the virus's role in causing cancer remains unproven.

Wellness expert advocates higher sodium intake for health

Katie Wells, founder of Wellness Mama, argues that many people suffer from low sodium levels despite mainstream advice to restrict salt. She highlights sodium's role in cellular energy, hydration, and nervous system function based on personal experience and research. Wells urges a shift from restriction to optimization, especially for active lifestyles.

Personalized treatment plans improve early dementia symptoms

24 de abril de 2026 Reportado por IA

A study involving 73 people with mild cognitive impairment or early dementia found that tailored treatment plans targeting nutritional deficiencies, infections and other factors led to significant cognitive improvements after nine months. Participants in the intervention group saw their overall cognitive scores rise by 13.7 points, while the control group declined by 4.5 points. The approach combines medical interventions with lifestyle changes like diet, exercise and cognitive training.

sábado, 30 de maio de 2026, 01:39h

Pesquisadores questionam níveis de vitamina B12 e sua relação com o câncer

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