{"items":["5fda6f15745c650017912a07","5fda6f15745c650017912a04","5fda6f15745c650017912a06","5fda6f15745c650017912a05","5fda6f15745c650017912a08","5fda6f15745c6500179129ff","5fda6f15745c650017912a00","5fda6f15745c650017912a02","5fda6f15745c650017912a03","5fda6f15745c650017912a01","5fda6f15478b550017f698bb","5fda6f15478b550017f698b9","5fda6f15478b550017f698ba","5fda6f15478b550017f698bf","5fda6f15478b550017f698bc","5fda6f15478b550017f698c2","5fda6f15478b550017f698be","5fda6f15478b550017f698c0","5fda6f15478b550017f698c1","5fda6f15478b550017f698bd"],"styles":{"galleryType":"Columns","groupSize":1,"showArrows":true,"cubeImages":true,"cubeType":"max","cubeRatio":1.7777777777777777,"isVertical":true,"gallerySize":30,"collageAmount":0,"collageDensity":0,"groupTypes":"1","oneRow":false,"imageMargin":5,"galleryMargin":0,"scatter":0,"rotatingScatter":"","chooseBestGroup":true,"smartCrop":false,"hasThumbnails":false,"enableScroll":true,"isGrid":true,"isSlider":false,"isColumns":false,"isSlideshow":false,"cropOnlyFill":false,"fixedColumns":0,"enableInfiniteScroll":true,"isRTL":false,"minItemSize":50,"rotatingGroupTypes":"","rotatingCropRatios":"","columnWidths":"","gallerySliderImageRatio":1.7777777777777777,"numberOfImagesPerRow":3,"numberOfImagesPerCol":1,"groupsPerStrip":0,"borderRadius":0,"boxShadow":0,"gridStyle":0,"mobilePanorama":false,"placeGroupsLtr":true,"viewMode":"preview","thumbnailSpacings":4,"galleryThumbnailsAlignment":"bottom","isMasonry":false,"isAutoSlideshow":false,"slideshowLoop":false,"autoSlideshowInterval":4,"bottomInfoHeight":0,"titlePlacement":["SHOW_ON_THE_LEFT","SHOW_BELOW"],"galleryTextAlign":"center","scrollSnap":false,"itemClick":"nothing","fullscreen":true,"videoPlay":"hover","scrollAnimation":"NO_EFFECT","slideAnimation":"SCROLL","scrollDirection":0,"scrollDuration":400,"overlayAnimation":"FADE_IN","arrowsPosition":0,"arrowsSize":23,"watermarkOpacity":40,"watermarkSize":40,"useWatermark":true,"watermarkDock":{"top":"auto","left":"auto","right":0,"bottom":0,"transform":"translate3d(0,0,0)"},"loadMoreAmount":"all","defaultShowInfoExpand":1,"allowLinkExpand":true,"expandInfoPosition":0,"allowFullscreenExpand":true,"fullscreenLoop":false,"galleryAlignExpand":"left","addToCartBorderWidth":1,"addToCartButtonText":"","slideshowInfoSize":200,"playButtonForAutoSlideShow":false,"allowSlideshowCounter":false,"hoveringBehaviour":"NEVER_SHOW","thumbnailSize":120,"magicLayoutSeed":1,"imageHoverAnimation":"NO_EFFECT","imagePlacementAnimation":"NO_EFFECT","calculateTextBoxWidthMode":"PERCENT","textBoxHeight":26,"textBoxWidth":200,"textBoxWidthPercent":65,"textImageSpace":10,"textBoxBorderRadius":0,"textBoxBorderWidth":0,"loadMoreButtonText":"","loadMoreButtonBorderWidth":1,"loadMoreButtonBorderRadius":0,"imageInfoType":"ATTACHED_BACKGROUND","itemBorderWidth":0,"itemBorderRadius":0,"itemEnableShadow":false,"itemShadowBlur":20,"itemShadowDirection":135,"itemShadowSize":10,"imageLoadingMode":"BLUR","expandAnimation":"NO_EFFECT","imageQuality":90,"usmToggle":false,"usm_a":0,"usm_r":0,"usm_t":0,"videoSound":false,"videoSpeed":"1","videoLoop":true,"jsonStyleParams":"","gallerySizeType":"px","gallerySizePx":292,"allowTitle":true,"allowContextMenu":true,"textsHorizontalPadding":-30,"itemBorderColor":{"themeName":"color_12","value":"rgba(244,210,122,0)"},"showVideoPlayButton":true,"galleryLayout":2,"calculateTextBoxHeightMode":"MANUAL","targetItemSize":292,"selectedLayout":"2|bottom|1|max|true|0|true","layoutsVersion":2,"selectedLayoutV2":2,"isSlideshowFont":true,"externalInfoHeight":26,"externalInfoWidth":0.65},"container":{"width":210,"galleryWidth":215,"galleryHeight":0,"scrollBase":0,"height":null}}
營養素參考值 (NRVs) 與營養聲稱
營養素參考值 (NRVs) 與營養聲稱
曾耀源
(廠商會檢定中心)
香港政府最近建議為36個月以下嬰幼兒食用的嬰兒配方產品、較大嬰兒及幼兒配方產品及預先包裝食物內的營養素制定合適的營養素參考值 (Nutrient Reference Values, NRVs)。假如某種營養素沒有相關的NRV，則不得就該種營養素作出營養聲稱及健康聲稱。
甚麼是營養素參考值?
營養素參考值指不同營養素的建議攝入水平數值；其釐定方法合乎科學。
NRVs列出我們每天對各種營養素的需求；並用作制定營養聲稱的條件。例如，若要對固體食物作出 “含豐富蛋白質” 的營養含量聲稱﹐每100克食物必須含不少於蛋白質營養素參考值20% 的蛋白質。此外，香港法例訂明不得為並無設有NRV的營養素作出營養素功能聲稱。
不同國家會採用自訂的營養素參考值。香港現時採用中國營養素參考值，並以一個2000千卡能量的膳食為計算基礎。香港現時採用的NRVs 表列如下 (適用於預先包裝食品)：
然而，上述 NRVs 並不適用於36個月以下的嬰幼兒。因此，政府需要先為嬰幼兒另訂定一套 NRVs，才能制定准許在配方產品及嬰幼兒食物上作營養聲稱和健康聲稱的條件。
標示 “營養素參考值百分比” 的重要性
在香港, 你可能發現部分預先包裝食品的營養標籤上有 “營養素參考值百分比”（% NRV）一欄。% NRV 旨在標示每食用分量或每100克／毫升食物的營養素含量佔營養素參考值的百分比, 由0%至100%不等。
% NRV 偏高的食物其實不一定好，要視乎所含是哪一種營養素。例如，對於需限制攝入量的營養素（例如飽和脂肪和鈉），你應選吃% NRV偏低的食物。相反，若% NRV 偏高是指健康有益的營養素(例如膳食纖維)，則該食物對你有好處。
香港法例訂明營養標籤必須載有指定營養素的含量，但標示% DRV 則屬自願性質。諷刺的是，單看營養素的含量對大部份市民來說意義不大，他們不會因而明白該預先包裝食物實際佔去每日營養素所需的多少個百分比。
其實很多國家已強制要求營養標籤上必須標示% DRV (適用於中國)、% Daily Value (適用於美國) 或% Daily Intake (適用於澳洲) 。為了增加營養標籤的實際功用，香港應強制所有供成年人、兒童及嬰幼兒食用的預先包裝食品，均須載有營養素參考值百分比。
