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Saturday can be the worst enemy for our waistlines. Researchers found that study subjects on strict diet and exercise programs tend to lose weight more slowly than expected because they eat more on weekends than during the week.

Children whose immune systems rebound after treatment with potent anti-viral drugs for HIV infection face an increased risk of developing asthma, according to a new report in the Journal of Allergy and Clinical Immunology.

By delivering vaccine via DNA constructed to build antigens against flu, along with a minute electric pulse, researchers have immunized experimental animals against various strains of the virus. This approach could allow for the build up of vaccine reserves that could be easily and effectively dispensed in case of an epidemic.

For the first time, researchers have demonstrated that the administration of minute amounts of inhaled or intravenous hydrogen sulfide -- the molecule that gives rotten eggs their sulfurous stench -- significantly improves survival from extreme blood loss in rats. The researchers successfully used hydrogen sulfide to induce a state of reversible metabolic hibernation as a way to reduce death from insufficient blood supply to organs and tissues in a rat model of lethal hemorrhage.

Scientists at the Stanford University School of Medicine report that lowering levels of one cancer signal under a specific threshold reverses this process in mice, returning tumor cells to their normal, healthy state.

Glycogen, the muscle's primary fuel source during exercise, is replenished more rapidly when athletes ingest both carbohydrate and caffeine following exhaustive exercise, new research shows. Athletes who ingested caffeine with carbohydrate had 66 percent more glycogen in their muscles four hours after finishing intense, glycogen-depleting exercise, compared to when they consumed carbohydrate alone, according to the study.

Recent scientific findings explain why patients with a rare immunodeficiency disorder are unusually susceptible to certain common infections. By revealing the exact molecular mechanisms involved, they also give us clues as to why some "healthy" people are more prone to these infections than others, and suggest potential treatments.

A small protein may have a big role in helping you make more bone and less fat, researchers say. People can't take GILZ now, but a long-term goal is to develop a GILZ-like pill that would dramatically reduce fat production.

Some schizophrenia patients become less prone to violence when taking medication, but those with a history of childhood conduct problems continue to pose a higher risk even with treatment, according to a new study.

The current standard practice of giving infants and children 100 percent oxygen to prevent brain damage caused by oxygen deprivation may actually inflict additional harm, researchers have found.