S\u1eefa l\u00e0 lo\u1ea1i th\u1ef1c ph\u1ea9m gi\u00e0u ch\u1ea5t dinh d\u01b0\u1ee1ng, trong \u0111\u00f3 c\u00f3 \u0111\u01b0\u1eddng (kho\u1ea3ng 4,6%), protein (kho\u1ea3ng 3,5%) v\u00e0 ch\u1ea5t b\u00e9o (kho\u1ea3ng 3,5%). Ngo\u00e0i ra trong s\u1eefa c\u00f2n c\u00f3 nhi\u1ec1u vitamin v\u00e0 c\u00e1c mu\u1ed1i v\u00f4 c\u01a1. V\u00ec v\u1eady s\u1eefa l\u00e0 th\u1ee9c \u0103n ch\u1ee7 y\u1ebfu cho tr\u1ebb s\u01a1 sinh, c\u0169ng l\u00e0 lo\u1ea1i th\u1ee9c \u0103n gi\u00e0u ch\u1ea5t dinh d\u01b0\u1ee1ng cho ng\u01b0\u1eddi l\u1edbn.<\/p>\n\n\n\n
S\u1eefa b\u00f2 l\u00e0 th\u1ee9c \u0103n t\u1ef1 nhi\u00ean c\u1ee7a b\u00f2 m\u1eb9 d\u00e0nh cho b\u00f2 con, n\u00ean d\u00f9ng cho ng\u01b0\u1eddi c\u00f3 hai \u0111i\u1ec3m kh\u00f4ng th\u00edch h\u1ee3p: M\u1ed9t l\u00e0 khi tr\u1ebb em u\u1ed1ng s\u1eefa b\u00f2 d\u1ec5 b\u1ecb \u0111\u00f3ng v\u00f3n th\u00e0nh c\u1ee5c trong d\u1ea1 d\u00e0y, kh\u00f3 cho vi\u1ec7c ti\u00eau ho\u00e1 v\u00e0 h\u1ea5p th\u1ee5. \u0110\u00f3 l\u00e0 v\u00ec c\u00e1c ch\u1ea5t protein trong s\u1eefa b\u00f2 (ch\u1ee7 y\u1ebfu l\u00e0 casein) d\u1ec5 b\u1ecb \u0111\u00f4ng k\u1ebft m\u00e0 ra. Theo t\u00ednh to\u00e1n, kh\u1ea3 n\u0103ng k\u1ebft v\u00f3n c\u1ee7a s\u1eefa b\u00f2 l\u00e0 50 – 90 g (cho 1 l\u00edt) th\u00ec \u1edf s\u1eefa m\u1eb9 (ch\u1ee7 y\u1ebfu l\u00e0 protein tr\u1eafng), \u0111\u1ed9 k\u1ebft v\u00f3n l\u00e0 0 – 2 g. Hai l\u00e0 v\u1edbi ng\u01b0\u1eddi l\u1edbn khi \u0103n s\u1eefa b\u00f2, nhi\u1ec1u khi sinh \u0111\u1ea7y b\u1ee5ng, tr\u01b0\u1edbng b\u1ee5ng, th\u1eadm ch\u00ed b\u1ecb th\u00e1o d\u1ea1. \u0110\u00f3 l\u00e0 do c\u00e1c ch\u1ea5t \u0111\u01b0\u1eddng trong s\u1eefa b\u00f2 g\u00e2y n\u00ean. \u0110\u01b0\u1eddng c\u00f3 trong c\u00e1c lo\u1ea1i s\u1eefa \u0111\u1ed9ng v\u1eadt \u0111\u1ec1u l\u00e0 \u0111\u01b0\u1eddng lactoza. \u0110\u01b0\u1eddng lactoza ch\u1ec9 d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a men lactosin m\u1edbi c\u00f3 th\u1ec3 ti\u00eau ho\u00e1 \u0111\u01b0\u1ee3c. Trong c\u01a1 th\u1ec3 tr\u1ebb s\u01a1 sinh, men lactosin c\u00f3 ho\u1ea1t t\u00ednh r\u1ea5t m\u1ea1nh. Khi tu\u1ed5i c\u00e0ng l\u1edbn, lactosin \u0111\u01b0\u1ee3c ti\u1ebft ra ng\u00e0y c\u00e0ng th\u1ea5p (kh\u00f4ng k\u1ec3 ng\u01b0\u1eddi \u0111\u00e3 d\u00f9ng s\u1eefa d\u00e0i ng\u00e0y) n\u00ean c\u00f3 ng\u01b0\u1eddi l\u1edbn \u0103n s\u1eefa kh\u00f4ng ti\u00eau ho\u00e1 \u0111\u01b0\u1ee3c, khi \u0103n s\u1eefa s\u1ebd l\u00ean men sinh ra cacbon \u0111ioxit g\u00e2y ra tr\u01b0\u1edbng b\u1ee5ng.<\/p>\n\n\n\n
\u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ec3 tr\u00ean, ng\u01b0\u1eddi ta ch\u1ebf bi\u1ebfn s\u1eefa th\u00e0nh s\u1eefa chua. S\u1eefa chua ch\u00ednh l\u00e0 s\u1eefa b\u00f2 t\u01b0\u01a1i cho l\u00ean men (men lactosin, m\u1ed9t lo\u1ea1i men c\u00f3 \u00edch cho c\u01a1 th\u1ec3 ng\u01b0\u1eddi), sau \u0111\u00f3 di\u1ec7t khu\u1ea9n, v\u00e0 ti\u1ebfn h\u00e0nh b\u1ea3o qu\u1ea3n l\u1ea1nh m\u00e0 th\u00e0nh. Trong qu\u00e1 tr\u00ecnh l\u00ean men, m\u1ed9t ph\u1ea7n \u0111\u01b0\u1eddng lactoza \u0111\u01b0\u1ee3c chuy\u1ec3n ho\u00e1 th\u00e0nh axit lactic, \u0111\u1ed3ng th\u1eddi lo\u1ea1i \u03b2 – casein d\u1ec5 k\u1ebft v\u00f3n s\u1ebd bi\u1ebfn th\u00e0nh \u03b3 – casein kh\u00f4ng b\u1ecb k\u1ebft v\u00f3n, hai lo\u1ea1i chuy\u1ec3n ho\u00e1 k\u1ec3 tr\u00ean kh\u00f4ng l\u00e0m m\u1ea5t \u0111i gi\u00e1 tr\u1ecb dinh d\u01b0\u1ee1ng c\u1ee7a s\u1eefa m\u00e0 l\u1ea1i c\u1ea3i thi\u1ec7n \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng r\u1ea5t nhi\u1ec1u \u0111\u1ec3 s\u1eefa d\u1ec5 \u0111\u01b0\u1ee3c c\u01a1 th\u1ec3 h\u1ea5p th\u1ee5. Ngo\u00e0i ra trong s\u1eefa chua c\u00f2n c\u00f3 axit lactic c\u00f3 th\u1ec3 duy tr\u00ec \u0111\u01b0\u1ee3c \u0111\u1ed9 chua c\u1ee7a ru\u1ed9t, \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u00e1c vi khu\u1ea9n c\u00f3 h\u1ea1i, \u0111\u1ed3ng th\u1eddi x\u00fac ti\u1ebfn s\u1ef1 sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c vi khu\u1ea9n c\u00f3 \u00edch. S\u1eefa chua c\u00f2n gi\u00fap cho c\u01a1 th\u1ec3 h\u1ea5p th\u1ee5 canxi. V\u00ec v\u1eady s\u1eefa chua l\u00e0 m\u1ed9t lo\u1ea1i ch\u1ea5t dinh d\u01b0\u1ee1ng c\u00f3 t\u00e1c d\u1ee5ng b\u1ea3o v\u1ec7 s\u1ee9c kho\u1ebb r\u1ea5t t\u1ed1t.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: S\u1eefa chua; S\u1eefa b\u00f2.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
S\u1eefa l\u00e0 lo\u1ea1i th\u1ef1c ph\u1ea9m gi\u00e0u ch\u1ea5t dinh d\u01b0\u1ee1ng, trong \u0111\u00f3 c\u00f3 \u0111\u01b0\u1eddng (kho\u1ea3ng 4,6%), protein (kho\u1ea3ng 3,5%) v\u00e0 ch\u1ea5t b\u00e9o (kho\u1ea3ng 3,5%). Ngo\u00e0i ra trong s\u1eefa c\u00f2n c\u00f3 nhi\u1ec1u vitamin v\u00e0 c\u00e1c mu\u1ed1i v\u00f4 c\u01a1. V\u00ec v\u1eady s\u1eefa l\u00e0 th\u1ee9c \u0103n ch\u1ee7 y\u1ebfu cho tr\u1ebb s\u01a1 sinh, c\u0169ng l\u00e0 lo\u1ea1i th\u1ee9c \u0103n gi\u00e0u ch\u1ea5t […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[8,15],"tags":[],"class_list":["post-8078","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8078","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=8078"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8078\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}