Genetics

Uncovering a 'smoking gun' of biological aging clocks

A newly discovered ribosomal DNA (rDNA) clock can be used to accurately determine an individual's chronological and biological age, according to research led by Harvard T.H. Chan School of Public Health. The ribosomal clock ...

Medical research

Researchers identify lynchpin to activating brown fat cells

(Medical Xpress)—Researchers at the University of California, San Francisco (UCSF) have identified the lynchpin that activates brown fat cells, which burn fat molecules instead of storing them, making them the focus of ...

Medical research

Low-calorie diet may not prolong life: study (Update)

Scientists have found that calorie restriction—a diet comprised of approximately 30 percent fewer calories but with the same nutrients of a standard diet—does not extend years of life or reduce age-related deaths in a ...

Overweight & Obesity

Study shows obese flies live longer on a diet at any age

Old, obese flies get healthier and live longer if put on a diet, University of Connecticut researchers report on Dec. 8 in PNAS. If the effect holds true for humans, it would mean it's never too late for obese people to improve ...

Genetics

Chaperoning fat storage: The molecular basis of adiposity

Weight gain and weight loss are not as simple as "calories in, calories out," given that countless factors affect body weight. Now, researchers from Japan have identified a gene that may serve as a master regulator of fat ...

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Calorie

The calorie is a pre-SI metric unit of energy. The unit was first defined by Professor Nicolas Clément in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867. In most fields its use is archaic, having been replaced by the SI unit of energy, the joule. However, in many countries it remains in common use as a unit of food energy. In the context of nutrition, and especially food labelling, the terms calorie (or Calorie) and kilocalorie are interchangeable. In either case the unit is approximately equal to 4.2 kJ.

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