Fish oils most ef­fec­tive against cancer

Fish Farmer - - World News -

OMEGA-3 oils de­rived from fish pack a stronger punch than other sources such as flaxseed when it comes to cancer pre­ven­tion, ac­cord­ing to a first ever study by a lead­ing Cana­dian re­search univer­sity.

Pro­fes­sor David Ma from the Univer­sity of Guelph, near Toronto in On­tario, said he has dis­cov­ered that ma­rine based omega-3s, of which sal­mon is a rich source, are eight times more ef­fec­tive at in­hibit­ing tu­mour de­vel­op­ment and growth.

The pro­fes­sor, who works in the De­part­ment of Hu­man Health and Nu­tri­tional Sci­ences at Guelph, ex­plained: ‘This study is the first to com­pare the cancer fight­ing po­tency of plant ver­sus ma­rine de­rived omega-3s on breast tu­mour de­vel­op­ment.

‘There is ev­i­dence that both omega-3s from plants and ma­rine sources are pro­tec­tive against cancer, and we wanted to de­ter­mine which form is more ef­fec­tive.’

There are three types of omega-3 fatty acids: al­pha-linolenic acid (ALA), eicos­apen­taenoic acid (EPA) and do­cosa­hex­aenoic acid (DHA).

ALA is plant based and found in such edi­ble seeds as flaxseed and in oils, such as soy, canola and hemp oil. EPA and DHA are found in ma­rine life, such as fish, al­gae and phy­to­plank­ton.

The study, pub­lished in the Jour­nal of Nu­tri­tional Bio­chem­istry, in­volved feed­ing the dif­fer­ent types of omega-3s to mice with a highly ag­gres­sive form of hu­man breast cancer called HER-2. This af­fects 25 per cent of women and has a poor prog­no­sis.

Ma ex­posed the mice to ei­ther the plant based or the ma­rine based omega-3s, be­gin­ning in utero.

‘The mice were ex­posed to the dif­fer­ent omega-3s even be­fore tu­mours de­vel­oped, which al­lowed us to com­pare how ef­fec­tive the fatty acids are at pre­ven­tion.

‘It’s known that EPA and DHA can in­hibit breast tu­mour growth, but no one has looked di­rectly at how ef­fec­tive these omega-3s are com­pared to ALA.’

Pro­fes­sor Ma found over­all ex­po­sure to ma­rine based omega-3s re­duced the size of the tu­mours by 60 to 70 per cent and the num­ber of tu­mours by 30 per cent.

Con­versely, higher doses of the plant based fatty acid were re­quired to de­liver the same im­pact as the ma­rine based omega-3s.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.