Snack happy With no high fructose corn syrup, trans fat or artificial ingredients, Barbara's Snackimals (HK$32) are a sensible snack for both children and adults. Get them at ThreeSixty's USA Fair, along with other organic and natural snacks, breakfast cereals, and personal care and beauty products from America. The fair ends on September 15. If it smells fishy, it could be a disorder Unexplained body odours could be due to a metabolic disorder called trimethylaminuria (also called fish odour syndrome), according to scientists from the Monell Chemical Senses Centre in Philadelphia. In the study, published online in The American Journal of Medicine, about one-third of the 353 patients who had body odour despite good personal hygiene tested positive for the condition. The genetically transmitted disease inhibits the ability of an enzyme to metabolise trimethylamine, a chemical compound produced naturally from foods rich in choline, such as eggs, certain legumes, wheat germ, saltwater fish and organ meats. If too much accumulates, the compound is excreted in urine, sweat, saliva and breath - causing fishy odours. Experts say a diet change can help. Daddy dearest Children who are raised by hands-on fathers are smarter and better behaved, according to long-term research of 138 children and their parents. The study's co-author, Erin Pougnet, a PhD candidate in Concordia University's psychology department, says such children have better problem-solving abilities and decreased emotional problems, such as sadness, social withdrawal and anxiety. Girls were found to be most affected by absentee dads, having significantly higher levels of emotional problems at school. Professor Lisa Serbin, the study's other co-author, says government initiatives, such as parental leave for men and parenting classes that emphasise the role of fathers, could help to maximise child development from early stages to pre-adolescence. The skinny on thinnies Researchers at Imperial College London and the University of Lausanne in Switzerland have discovered a genetic cause of extreme thinness. Published in the journal Nature, the study found that one person in 2,000 has an extra copy of part of chromosome 16, making men 23 times and women five times likelier to be underweight. Of more than 95,000 people studied, half of all children with the duplication were diagnosed with a 'failure to thrive'; a quarter of people with the duplication have microcephaly - an abnormally small head and brain linked with neurological defects and shorter life expectancy. Professor Philippe Froguel, who led the study, says: 'If we can work out why gene duplication in this region causes thinness, it might throw up new potential treatments for obesity and appetite disorders.'