Why tiny amounts of vitamin B12 matter more as we age

Two micrograms is an almost unimaginably small amount. It weighs less than a tiny fragment of a grain of table salt. Yet adults need only around this amount of vitamin B12 each day, depending on the guideline used, to support ...

Fructose sends a weaker satiety signal to the brain than glucose

Researchers at the Monell Chemical Senses Center have found that common dietary sugars fructose and glucose, despite having the same number of calories, communicate with the brain through different gut–brain pathways, a difference ...

Engineers find a way to deliver drugs directly to the esophagus

There are few treatment options available for people with disorders of the esophagus. Delivering drugs directly to this part of the body is difficult, so patients are usually treated with systemic drugs, which can have unwanted ...

Our brains may be automatically filtering out negative words

We tend to assume that emotionally charged words are more likely to grab our attention. An insult shouted across a crowded room or a disturbing phrase overheard on television can seem impossible to ignore. But a new study ...

Teaching the immune system to fight aging

Maybe we shouldn't be surprised that so-called "zombie cells" come with a catch. In response to severe damage, when cells can't recover full function but aren't ready to die, they can become senescent, in a zombie-like state ...

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