HUMANNUTRITIONJennifer BlackTim GreenVancouver Enjoys Lowest Obes<strong>it</strong>y RatesCould living in certain geographic are<strong>as</strong> impact your risk <strong>of</strong> obes<strong>it</strong>y?That appears to be the c<strong>as</strong>e according to UBC nutr<strong>it</strong>ion researcherJennifer Black who found higher obes<strong>it</strong>y rates in Canada’s e<strong>as</strong>ternprovinces, rural are<strong>as</strong> <strong>and</strong> northern Aboriginal commun<strong>it</strong>ies than inWestern Canada.“It’s not r<strong>and</strong>omly distributed,” says Asst. Pr<strong>of</strong>. Black, who discoveredthe e<strong>as</strong>t-to-west gradient upon reviewing 24 studies about thedistribution <strong>of</strong> food <strong>and</strong> obes<strong>it</strong>y in Canada conducted since 1997.Black’s findings show that women in Vancouver have the lowestobes<strong>it</strong>y rates in the nation. For men, the lowest obes<strong>it</strong>y ratesare in Richmond.Her next step is to look at the larger contextual issues for obes<strong>it</strong>y ratessuch <strong>as</strong> family income, the availabil<strong>it</strong>y <strong>of</strong> healthy <strong>and</strong> affordable food<strong>and</strong> opportun<strong>it</strong>ies to be physically active.A registered diet<strong>it</strong>ian, Black specializes in social determinants <strong>of</strong> health<strong>and</strong> dietary choice. “I’m interested in how att<strong>it</strong>udes <strong>and</strong> behaviorsrelated to eating, cooking, food selection, <strong>and</strong> body weight shapenutr<strong>it</strong>ion <strong>and</strong> health.”Previously a post-doctoral fellow in UBC’s Dept. <strong>of</strong> Sociology, Blackjoined the <strong>Faculty</strong>’s <strong>Food</strong>, Nutr<strong>it</strong>ion <strong>and</strong> Health program in January.W<strong>it</strong>h LFS Nutr<strong>it</strong>ion Pr<strong>of</strong>. Susan Barr, Black is also developingUBC research know-how <strong>and</strong> infr<strong>as</strong>tructure to tackle data fromthe Canadian Commun<strong>it</strong>y Health Survey (CCHS), the first set <strong>of</strong>comprehensive Canadian nutr<strong>it</strong>ion data generated in more than35 years. Rele<strong>as</strong>ed in 2004, the CCHS surveyed upwards <strong>of</strong> 35,000respondents from across the country on their dietary intake, v<strong>it</strong>amin<strong>and</strong> mineral supplement use, health risks <strong>and</strong> behaviors.Extra V<strong>it</strong>amin D for Pregnant <strong>and</strong>Bre<strong>as</strong>t-feeding WomenBlame <strong>it</strong> on Canada’s watery winter sun, but women who are pregnantor bre<strong>as</strong>t feeding need to take v<strong>it</strong>amin D supplements, according tohuman nutr<strong>it</strong>ion researcher Tim Green.“Our preliminary data shows that V<strong>it</strong>amin D levels in the mother’sblood are fairly low,” says Green, an <strong>as</strong>sociate pr<strong>of</strong>essor in the <strong>Faculty</strong>’s<strong>Food</strong>, Nutr<strong>it</strong>ion <strong>and</strong> Health program <strong>and</strong> lead investigator <strong>of</strong> the studyfunded by the Canadian Inst<strong>it</strong>utes <strong>of</strong> Health Research.He explains that v<strong>it</strong>amin D is v<strong>it</strong>al for bone health. W<strong>it</strong>hout <strong>it</strong>, babiescan develop rickets, a cond<strong>it</strong>ion when bones are too s<strong>of</strong>t <strong>and</strong> do notform properly. Green’s research partners include the BC Women’sHosp<strong>it</strong>al <strong>and</strong> Health Centre <strong>and</strong> the departments <strong>of</strong> pediatrics <strong>and</strong>obstetrics <strong>and</strong> gynecology at UBC’s <strong>Faculty</strong> <strong>of</strong> Medicine“Although we get a small amount <strong>of</strong> v<strong>it</strong>amin D from food, our bodiescreate <strong>it</strong> <strong>as</strong> <strong>it</strong> absorbs sunlight,” says Green. “And during the Canadianwinter, especially in Vancouver, there isn’t enough sun forthis to happen.”Green is exploring how much v<strong>it</strong>amin D pregnant <strong>and</strong> bre<strong>as</strong>t feedingwomen are currently getting <strong>and</strong> how much they should take <strong>as</strong>supplements to ensure health for themselves <strong>and</strong> their babies. Thestudy makes use <strong>of</strong> donated supplements created by Natural Factors.W<strong>it</strong>h more than 200 pregnant women <strong>as</strong> study participants, theresearch team is me<strong>as</strong>uring the effect <strong>of</strong> v<strong>it</strong>amin D supplements onthe growth <strong>of</strong> the baby <strong>and</strong> on the bone health <strong>of</strong> mother <strong>and</strong> baby.As well, the study investigates the possible effect <strong>of</strong> skin colour onv<strong>it</strong>amin D levels. Skin w<strong>it</strong>h darker pigments, e<strong>it</strong>her naturally or froma tan, tend to absorb less light, <strong>and</strong> therefore affects the amount <strong>of</strong>v<strong>it</strong>amin D the body produces. Researchers will me<strong>as</strong>ure how muchlight is reflected by a person’s skin using a device called a colorimeter.26 <strong>Faculty</strong> <strong>of</strong> <strong>L<strong>and</strong></strong> <strong>and</strong> <strong>Food</strong> <strong>Systems</strong> Annual Report 2009 | 2010
International Nutr<strong>it</strong>ion StudentsLessons from Rw<strong>and</strong>aSix <strong>of</strong> our International Nutr<strong>it</strong>ion students put their knowledge intopractice <strong>as</strong> part <strong>of</strong> a nutr<strong>it</strong>ion project in Rw<strong>and</strong>a this p<strong>as</strong>t spring.Led by Judy McLean, Adjunct Pr<strong>of</strong>essor, <strong>Food</strong>, Nutr<strong>it</strong>ion & Health,the students spent between six weeks <strong>and</strong> three months in Rw<strong>and</strong>a,working in partnership w<strong>it</strong>h local students to conduct a householdsurvey on the causes <strong>of</strong> malnutr<strong>it</strong>ion.Gurjeet Kaur agrees. “The practical experience <strong>of</strong> being out in the fieldis very important,” she says. “You gain a different perspective when youare actually out there interacting w<strong>it</strong>h people.”Kaur is heading back to Rw<strong>and</strong>a in September to take part in thesecond stage <strong>of</strong> the project, which includes collecting more qual<strong>it</strong>ativedata via key informant interviews, focus groups <strong>and</strong> discussions.“In rural Rw<strong>and</strong>a, one in five kids die before age five,” says McLean.“The diet, b<strong>as</strong>ed on banan<strong>as</strong> <strong>and</strong> c<strong>as</strong>sava, is partly responsible for thehigh rate <strong>of</strong> malnutr<strong>it</strong>ion, but poor infant <strong>and</strong> child feeding practices<strong>and</strong> lack <strong>of</strong> clean water are more to blame. Diversifying crops isdifficult due to inadequate rainfall <strong>and</strong> lack <strong>of</strong> arable l<strong>and</strong>.”The students surveyed more than 400 households in 40 villages. Theinformation collected will inform a nutr<strong>it</strong>ion intervention proposal.“You can study food secur<strong>it</strong>y <strong>and</strong> nutr<strong>it</strong>ion, but <strong>it</strong>’s completely differentto experience <strong>it</strong>,” says Roberta Wozniak, a recent Nutr<strong>it</strong>ional Sciencegraduate who saw first-h<strong>and</strong> the challenges the country is facing.Outside a nearby orphanage, Wozniak met P<strong>as</strong>c<strong>as</strong>ie, a 22 year old, HIVpos<strong>it</strong>ive, genocide orphan, <strong>and</strong> her 7-month-old son Chelsea. Sheme<strong>as</strong>ured the boy’s mid upper arm circumference; <strong>it</strong> w<strong>as</strong> the diameter<strong>of</strong> a loonie, indicating severe malnourishment.Although her son needed to be hosp<strong>it</strong>alized, P<strong>as</strong>c<strong>as</strong>ie didn’t have the$2 fee <strong>and</strong> so the hosp<strong>it</strong>al didn’t want to adm<strong>it</strong> him. Thanks to thestudents’ intervention, however, the doctor eventually relented <strong>and</strong>treated the child.“Navigating through the system, getting Chelsea treated <strong>and</strong> testedfor HIV- there’s no way I can teach the real<strong>it</strong>y <strong>of</strong> that in the cl<strong>as</strong>sroom,”McLean adds.<strong>Faculty</strong> <strong>of</strong> <strong>L<strong>and</strong></strong> <strong>and</strong> <strong>Food</strong> <strong>Systems</strong> Annual Report 2009 | 2010 27