5 lactose	intolerant
      4 small	intestine
      3 two	thirds
      3 thirds	of
      3 the	same
      3 the	gut
      3 the	bloodstream
      3 needed	to
      3 link	Print
      3 lactose	tolerant
      3 jpg	ixlib
      3 ixlib	rails
      3 in	the
      3 drink	milk
      3 can	drink
      3 Print	article
      3 Lactose	intolerance
      3 Email	link
      3 000	years
      2 you	can
      2 you	are
      2 years	ago
      2 well	they
      2 wall	and
      2 w	657
      2 to	see
      2 to	digest
      2 to	cross
      2 to	BUTTON
      2 through	the
      2 this	enzyme
      2 they	could
      2 the	small
      2 the	milk
      2 the	lactose
      2 the	enzyme
      2 the	bacteria
      2 such	as
      2 some	people
      2 see	our
      2 science	Click
      2 rails	1
      2 products	its
      2 present	day
      2 people	lactose
      2 other	foods
      2 only	a
      2 of	your
      2 of	milk
      2 of	cookies
      2 not	make
      2 my	subscription
      2 more	science
      2 milk	is
      2 milk	and
      2 milk	It
      2 make	the
      2 make	lactase
      2 lactose	intolerance
      2 is	not
      2 is	found
      2 is	a
      2 intolerance	is
      2 in	present
      2 in	lactose
      2 in	Home
      2 here	to
      2 gut	wall
      2 found	in
      2 for	the
      2 for	more
      2 enter	the
      2 cross	the
      2 cheeses	such
      2 calf	to
      2 be	a
      2 are	some
      2 are	lactose
      2 and	the
      2 and	enter
      2 about	eight
      2 a	few
      2 Why	are
      2 Twitter	Reddit
      2 Topics	Magazine
      2 Toggle	Dropdown
      2 Today	some
      2 Share	Tweet
      2 Reddit	Email
      2 Mountains	in
      2 More	More
      2 More	Articles
      2 Magazine	Newsletter
      2 Looking	for
      2 Log	in
      2 Latest	Topics
      2 Karl	Kruszelnicki
      2 Home	Latest
      2 For	example
      2 Facebook	Twitter
      2 Click	here
      2 BUTTON	Toggle
      2 BUTTON	Share
      2 Account	Log
      2 1	1
      2 1	0
      2 0	h
      1 your	small
      1 your	jejunum
      1 your	gut
      1 your	DNA
      1 young	suckling
      1 you	would
      1 you	wish
      1 you	subtract
      1 you	re
      1 you	may
      1 you	know
      1 you	have
      1 you	domesticate
      1 yes	its
      1 years	of
      1 years	later
      1 years	A
      1 www	googletagmanager
      1 would	pass
      1 would	include
      1 would	have
      1 would	get
      1 would	depend
      1 would	cope
      1 would	be
      1 wool	dung
      1 wonderful	coincidence
      1 without	discomfort
      1 without	any
      1 with	some
      1 with	other
      1 with	nasty
      1 wish	to
      1 who	could
      1 who	are
      1 white	In
      1 while	aged
      1 which	is
      1 whey	liquid
      1 whether	you
      1 were	at
      1 well	as
      1 website	uses
      1 weaned	If
      1 way	of
      1 water	from
      1 water	This
      1 was	handy
      1 vitamin	D
      1 ve	been
      1 variability	in
      1 usually	contaminated
      1 uses	cookies
      1 user	login
      1 useful	vitamin
      1 useful	mutation
      1 used	an
      1 use	of
      1 use	2
      1 us	3
      1 us	2
      1 updates	from
      1 up	the
      1 up	
      1 under	the
      1 two	simpler
      1 two	advantages
      1 turns	milk
      1 tried	to
      1 transit	time
      1 too	large
      1 tolerant	peoples
      1 tolerant	it
      1 tolerant	cattle
      1 together	But
      1 today	can
      1 to	the
      1 to	store
      1 to	split
      1 to	some
      1 to	soft
      1 to	raise
      1 to	process
      1 to	our
      1 to	opt
      1 to	only
      1 to	make
      1 to	leave
      1 to	lactase
      1 to	independence
      1 to	geography
      1 to	five
      1 to	drink
      1 to	collect
      1 to	browse
      1 to	be
      1 to	a
      1 to	Pocket
      1 to	Europe
      1 to	50
      1 to	12
      1 times	more
      1 times	Over
      1 time	to
      1 time	through
      1 time	they
      1 three	to
      1 though	your
      1 those	who
      1 third	make
      1 they	stop
      1 they	started
      1 they	need
      1 they	drank
      1 they	coped
      1 they	consumed
      1 they	also
      1 there	would
      1 then	only
      1 their	symptoms
      1 their	small
      1 their	natural
      1 their	mothers
      1 the	two
      1 the	stomach
      1 the	social
      1 the	site
      1 the	primary
      1 the	population
      1 the	other
      1 the	nutrition
      1 the	long
      1 the	lining
      1 the	lactase
      1 the	headline
      1 the	curds
      1 the	cow
      1 the	condition
      1 the	common
      1 the	colon
      1 the	cells
      1 the	calf
      1 the	Zagros
      1 the	Taurus
      1 that	make
      1 that	at
      1 than	those
      1 than	others
      1 term	lactose
      1 takes	about
      1 t	compete
      1 symptoms	would
      1 survive	longer
      1 suppose	that
      1 sugars	glucose
      1 sugars	are
      1 sugar	in
      1 suckling	mammals
      1 suckling	babies
      1 suckling	Today
      1 subtract	the
      1 subscription	options
      1 subscription	Give
      1 subscription	Features
      1 store	milk
      1 stop	suckling
      1 stop	making
      1 stools	or
      1 stomach	to
      1 stomach	passes
      1 stomach	of
      1 stomach	discomfort
      1 still	left
      1 statistics	By
      1 state	of
      1 started	domesticating
      1 spread	to
      1 spread	rapidly
      1 split	the
      1 specific	Lactose
      1 source	with
      1 somewhere	between
      1 some	useful
      1 some	foods
      1 some	degree
      1 some	cases
      1 some	99
      1 some	40
      1 some	200
      1 solid	and
      1 soft	stools
      1 social	behaviours
      1 so	on
      1 so	below
      1 small	enough
      1 slows	its
      1 slowly	spread
      1 slowly	giving
      1 sitting	how
      1 site	you
      1 simpler	sugars
      1 sheep	buffalo
      1 sheep	Cattle
      1 sedentary	way
      1 secondary	products
      1 science	commentator
      1 same	time
      1 same	foods
      1 same	amount
      1 s	lower
      1 rennet	turns
      1 rennet	is
      1 renewable	food
      1 related	to
      1 readily	available
      1 read	BUTTON
      1 re	still
      1 rapidly	Today
      1 raise	the
      1 rails	2
      1 quite	low
      1 process	it
      1 problem	for
      1 problem	Back
      1 primary	products
      1 pre	lactose
      1 practice	slowly
      1 posed	a
      1 populations	and
      1 population	Paul
      1 policy	3
      1 played	a
      1 pig	domestication
      1 physically	too
      1 personalised	content
      1 per	minute
      1 per	cent
      1 peoples	there
      1 people	who
      1 people	together
      1 people	living
      1 people	first
      1 people	are
      1 passes	its
      1 pass	into
      1 parts	of
      1 part	We
      1 over	milk
      1 out	of
      1 out	Receive
      1 our	use
      1 our	subscription
      1 our	gift
      1 our	ancestors
      1 others	How
      1 other	advantages
      1 or	keep
      1 or	even
      1 options	Looking
      1 options	Cosmos
      1 opt	out
      1 only	suckling
      1 one	third
      1 one	sitting
      1 on	to
      1 on	how
      1 on	Lactose
      1 on	For
      1 of	use
      1 of	the
      1 of	non
      1 of	natural
      1 of	life
      1 of	human
      1 of	energy
      1 of	animals
      1 of	age
      1 of	affairs
      1 of	adults
      1 of	Swedish
      1 of	Karls
      1 obvious	discomfort
      1 nutrition	they
      1 ns	html
      1 not	usually
      1 not	black
      1 normal	state
      1 non	essential
      1 nomadic	lifestyle
      1 need	from
      1 natural	variability
      1 natural	gut
      1 nasty	bacteria
      1 mutation	spread
      1 much	lactose
      1 mothers	milk
      1 mostly	water
      1 more	time
      1 more	slowly
      1 more	fertile
      1 months	for
      1 molecules	in
      1 minute	read
      1 minute	Delayed
      1 million	Americans
      1 millilitres	of
      1 milk	would
      1 milk	without
      1 milk	they
      1 milk	their
      1 milk	needed
      1 milk	into
      1 milk	for
      1 milk	each
      1 milk	comfortably
      1 milk	also
      1 milk	This
      1 milk	Some
      1 milk	But
      1 meat	bone
      1 meant	they
      1 me	be
      1 may	do
      1 manufacture	an
      1 mammals	manufacture
      1 mammals	generally
      1 mammals	can
      1 making	this
      1 making	it
      1 making	cheese
      1 make	up
      1 magazine	Of
      1 lower	in
      1 low	in
      1 lot	of
      1 lose	this
      1 longer	in
      1 long	term
      1 logo	1
      1 login	personalised
      1 living	in
      1 liquid	Process
      1 lining	of
      1 lifestyle	and
      1 life	Then
      1 let	me
      1 less	Evolution
      1 legends	about
      1 left	with
      1 leave	a
      1 least	8
      1 leading	to
      1 later	The
      1 large	to
      1 lactose	while
      1 lactose	they
      1 lactose	into
      1 lactose	and
      1 lactose	And
      1 lactase	the
      1 lactase	is
      1 lactase	enzyme
      1 lactase	baby
      1 lactase	after
      1 lactase	This
      1 labour	and
      1 known	as
      1 know	only
      1 kilojoules	per
      1 kilograms	of
      1 kill	it
      1 keep	it
      1 jejunum	and
      1 its	wool
      1 its	transit
      1 its	secondary
      1 its	milk
      1 its	meat
      1 its	higher
      1 its	contents
      1 it	to
      1 it	easier
      1 it	drops
      1 it	contains
      1 it	alive
      1 it	If
      1 it	Human
      1 issues	3
      1 issue	Renew
      1 is	the
      1 is	related
      1 is	readily
      1 is	physically
      1 is	mostly
      1 is	milk
      1 is	an
      1 is	about
      1 invented	cheese
      1 intolerant	__________________________________________________________________
      1 intolerant	The
      1 intolerant	Somali
      1 intolerant	It
      1 intolerant	BUTTON
      1 intolerance	to
      1 intolerance	affects
      1 intolerance	But
      1 into	the
      1 into	curds
      1 into	and
      1 intestine	needed
      1 intestine	more
      1 intestine	at
      1 intestine	Thanks
      1 ingenuity	also
      1 influences	whether
      1 inflated	stomach
      1 infants	stop
      1 infants	had
      1 infancy	This
      1 independence	you
      1 include	stomach
      1 in	your
      1 in	water
      1 in	their
      1 in	pre
      1 in	one
      1 in	how
      1 in	cow
      1 in	bad
      1 in	as
      1 in	a
      1 in	Spanish
      1 in	Europe
      1 in	Ethiopia
      1 in	Cosmos
      1 in	China
      1 if	you
      1 id	GTM
      1 humans	don
      1 human	infants
      1 human	breast
      1 https	www
      1 html	id
      1 how	well
      1 how	much
      1 how	efficient
      1 how	an
      1 horn	or
      1 higher	fat
      1 hide	and
      1 herders	would
      1 headline	Why
      1 have	legends
      1 have	even
      1 have	cheese
      1 have	about
      1 has	two
      1 hard	cheeses
      1 handy	in
      1 had	the
      1 h	447
      1 h	446
      1 gut	making
      1 gut	does
      1 gut	bacteria
      1 guests	A
      1 growing	mammals
      1 grass	which
      1 googletagmanager	com
      1 good	example
      1 goats	and
      1 goat	and
      1 glucose	and
      1 giving	the
      1 gift	options
      1 get	from
      1 get	all
      1 geography	Read
      1 generally	lose
      1 galactose	These
      1 front	cover
      1 from	their
      1 from	the
      1 from	eating
      1 from	House
      1 from	Cosmos
      1 for	user
      1 for	two
      1 for	its
      1 for	dinner
      1 for	at
      1 for	a
      1 foods	the
      1 foods	can
      1 foods	The
      1 foods	Secondly
      1 food	source
      1 five	years
      1 first	let
      1 first	acquired
      1 finally	it
      1 few	per
      1 few	people
      1 feta	are
      1 fertile	descendants
      1 favourable	after
      1 fat	content
      1 farting	cramps
      1 extract	from
      1 explanation	is
      1 explains	__________________________________________________________________
      1 excessive	farting
      1 example	suppose
      1 example	lactose
      1 example	is
      1 eventually	allowed
      1 even	though
      1 even	less
      1 even	diarrhoea
      1 essential	cookies
      1 enzyme	to
      1 enzyme	lactase
      1 enzyme	in
      1 enzyme	called
      1 enzyme	around
      1 enzyme	and
      1 enzyme	after
      1 enough	to
      1 energy	as
      1 email	updates
      1 eight	to
      1 eight	months
      1 efficient	their
      1 eating	the
      1 eat	grass
      1 easier	to
      1 each	day
      1 duodenum	parts
      1 dung	labour
      1 drought	Thirdly
      1 drops	down
      1 drkarl	jpg
      1 drink	500
      1 draw	in
      1 drank	milk
      1 down	to
      1 down	lactose
      1 don	t
      1 domestication	began
      1 domesticating	goats
      1 domesticate	an
      1 does	not
      1 does	For
      1 do	so
      1 discomfort	excessive
      1 discomfort	Why
      1 discomfort	Today
      1 dinner	guests
      1 digest	milk
      1 digest	it
      1 digest	Fermented
      1 diarrhoea	c67_Whyisitso_2
      1 details	OK
      1 descendants	than
      1 depend	on
      1 degree	Credit
      1 day	without
      1 day	Turkey
      1 day	Iran
      1 daily	email
      1 curds	solid
      1 curds	and
      1 cultures	have
      1 cramps	and
      1 cow	sheep
      1 cow	Milk
      1 cover	Share
      1 course	in
      1 could	survive
      1 could	not
      1 could	digest
      1 cosmos	magazine
      1 coped	would
      1 cope	better
      1 cookies	you
      1 cookies	if
      1 cookies	for
      1 cookies	Logged
      1 continuing	to
      1 contents	on
      1 content	slows
      1 content	and
      1 contaminated	with
      1 contains	some
      1 consumed	in
      1 conditions	are
      1 condition	known
      1 compete	for
      1 common	sugar
      1 commentator	Looking
      1 comfortably	Karl
      1 com	ns
      1 colon	can
      1 collect	the
      1 coincidence	rennet
      1 chemical	called
      1 cheese	for
      1 cheese	Many
      1 cheese	Cheese
      1 cheddar	and
      1 cent	in
      1 cells	that
      1 cattle	herders
      1 cases	even
      1 can	kill
      1 can	get
      1 can	bring
      1 can	be
      1 can	also
      1 called	rennet
      1 called	lactase
      1 calcium	But
      1 c67_Whyisitso_2	jpg
      1 c67_Whyisitso_1	jpg
      1 by	the
      1 by	lactose
      1 buffalo	goat
      1 browse	the
      1 bring	people
      1 breast	milk
      1 breaking	down
      1 born	influences
      1 bone	hide
      1 bloodstream	leading
      1 bloodstream	This
      1 bloodstream	So
      1 bloating	Lactose
      1 black	and
      1 big	problem
      1 between	the
      1 better	than
      1 below	X
      1 behaviours	needed
      1 began	about
      1 been	making
      1 be	weaned
      1 be	specific
      1 bad	times
      1 bacteria	were
      1 bacteria	more
      1 bacteria	in
      1 bacteria	And
      1 back	issue
      1 baby	mammals
      1 babies	and
      1 available	Cows
      1 author	and
      1 ate	other
      1 at	the
      1 at	least
      1 at	breaking
      1 at	about
      1 as	you
      1 as	well
      1 as	lactose
      1 as	cheddar
      1 as	calcium
      1 as	Parmesan
      1 as	My
      1 article	appeared
      1 article	Why
      1 article	Facebook
      1 article	Contrib
      1 around	three
      1 around	11
      1 are	small
      1 are	quite
      1 are	favourable
      1 are	born
      1 are	agreeing
      1 are	affected
      1 appeared	in
      1 any	obvious
      1 animals	By
      1 animal	you
      1 and	you
      1 and	yes
      1 and	white
      1 and	whey
      1 and	to
      1 and	through
      1 and	statistics
      1 and	so
      1 and	sheep
      1 and	science
      1 and	pig
      1 and	infants
      1 and	humans
      1 and	human
      1 and	horn
      1 and	galactose
      1 and	feta
      1 and	duodenum
      1 and	can
      1 and	bloating
      1 and	adapt
      1 and	accidentally
      1 and	Iraq
      1 and	Dutch
      1 and	Arab
      1 and	Africa
      1 ancestors	in
      1 ancestor	used
      1 an	inflated
      1 an	enzyme
      1 an	author
      1 an	animal
      1 an	ancestor
      1 amount	of
      1 also	posed
      1 also	played
      1 also	draw
      1 also	ate
      1 allowed	our
      1 all	young
      1 all	the
      1 alive	for
      1 agreeing	to
      1 ago	somewhere
      1 ago	people
      1 aged	hard
      1 age	But
      1 after	you
      1 after	they
      1 after	infancy
      1 affects	two
      1 affected	by
      1 affairs	for
      1 advantages	over
      1 advantages	Cows
      1 adults	would
      1 adults	tried
      1 adults	Maybe
      1 adaptation	meant
      1 adapt	to
      1 acquired	the
      1 account	Log
      1 accidentally	invented
      1 about	the
      1 about	how
      1 about	500
      1 about	10
      1 a	wonderful
      1 a	sedentary
      1 a	renewable
      1 a	problem
      1 a	part
      1 a	normal
      1 a	nomadic
      1 a	lot
      1 a	drought
      1 a	calf
      1 a	big
      1 a	back
      1 a	Gift
      1 __________________________________________________________________	Where
      1 __________________________________________________________________	Share
      1 ____________________	BUTTON
      1 Zagros	Mountains
      1 X	Marketing
      1 X	Essential
      1 X	Analytics
      1 Why	About
      1 Where	you
      1 When	you
      1 We	ve
      1 Use	of
      1 Tweet	c67_Whyisitso_1
      1 Tweet	Popular
      1 Turkey	they
      1 Today	two
      1 Today	More
      1 This	website
      1 This	was
      1 This	useful
      1 This	is
      1 This	enzyme
      1 This	article
      1 This	adaptation
      1 Thirdly	milk
      1 These	sugars
      1 Then	around
      1 The	stomach
      1 The	practice
      1 The	explanation
      1 Thanks	to
      1 Terms	of
      1 Technology	More
      1 Taurus	Mountains
      1 Swedish	and
      1 Subscriptions	2
      1 Subscription	Biology
      1 Subscribe	Subscription
      1 Subscribe	Account
      1 Submissions	3
      1 Stories	More
      1 Spina	Parsely
      1 Spanish	French
      1 Space	Technology
      1 Some	adults
      1 Somali	people
      1 So	all
      1 Sign	up
      1 Share	to
      1 Share	BUTTON
      1 Send	to
      1 Secondly	milk
      1 Save	to
      1 Renew	my
      1 Receive	daily
      1 Read	on
      1 RSS	IFRAME
      1 Process	the
      1 Privacy	policy
      1 Popular	Today
      1 Pocket	Email
      1 Physics	Space
      1 Paul	Getty
      1 Parsely	logo
      1 Parmesan	have
      1 Palaeontology	Physics
      1 Over	the
      1 Of	course
      1 OK	BUTTON
      1 Newsletter	Subscribe
      1 Newsletter	Gift
      1 Newsletter	1
      1 My	account
      1 More	details
      1 More	Digital
      1 Milk	is
      1 Maybe	you
      1 Mathematics	Palaeontology
      1 Marketing	More
      1 March	2016
      1 Mar	2016
      1 Many	cultures
      1 Manage	my
      1 Macmillan	2014
      1 Logged	in
      1 Log	out
      1 Latest	Stories
      1 Lactose	molecules
      1 Lactose	is
      1 Kruszelnicki	is
      1 Kruszelnicki	explains
      1 Karls	Macmillan
      1 It	takes
      1 It	s
      1 It	is
      1 Issues	Buy
      1 Iraq	and
      1 Iran	and
      1 Internships	1
      1 In	some
      1 Images	Food
      1 If	conditions
      1 If	adults
      1 IFRAME	https
      1 Human	ingenuity
      1 How	well
      1 House	of
      1 Give	a
      1 Gift	Subscribe
      1 Gift	Manage
      1 Getty	Images
      1 Geoscience	Mathematics
      1 GTM	5TDDMZV
      1 French	and
      1 Food	can
      1 Fermented	cheeses
      1 Feb	Mar
      1 Features	Biology
      1 FAQs	1
      1 Evolution	eventually
      1 Europe	and
      1 Europe	When
      1 Ethiopia	today
      1 Essential	X
      1 Edited	extract
      1 Dutch	people
      1 Dropdown	Save
      1 Dropdown	Facebook
      1 Digital	Issues
      1 Delayed	by
      1 DNA	does
      1 D	as
      1 Credit	Edited
      1 Cows	eat
      1 Cows	and
      1 Cosmos	____________________
      1 Cosmos	Cosmos
      1 Cosmos	Account
      1 Cosmos	85
      1 Cosmos	67
      1 Contrib	drkarl
      1 Contact	us
      1 China	Lactose
      1 Cheese	has
      1 Cattle	and
      1 By	continuing
      1 By	a
      1 Buy	a
      1 But	some
      1 But	one
      1 But	milk
      1 But	growing
      1 But	first
      1 Biology	Geoscience
      1 Biology	03
      1 Back	then
      1 Back	issues
      1 BUTTON	Sign
      1 BUTTON	Send
      1 BUTTON	Cosmos
      1 Articles	Spina
      1 Articles	Latest
      1 Arab	populations
      1 And	its
      1 And	finally
      1 Analytics	X
      1 Americans	are
      1 Africa	to
      1 Advertising	2
      1 About	us
      1 About	12
      1 A	good
      1 A	chemical
      1 99	of
      1 85	front
      1 8	000
      1 67	Feb
      1 657	cosmos
      1 657	Lactose
      1 5TDDMZV	This
      1 500	years
      1 500	millilitres
      1 50	in
      1 447	w
      1 446	w
      1 40	million
      1 4	minute
      1 3	Use
      1 3	Newsletter
      1 3	Internships
      1 3	FAQs
      1 2016	under
      1 2016	4
      1 2014	This
      1 200	kilograms
      1 2	Submissions
      1 2	Privacy
      1 2	Back
      1 2	About
      1 2	1
      1 12	kilojoules
      1 12	000
      1 11	000
      1 10	times
      1 1	Terms
      1 1	Subscriptions
      1 1	Karl
      1 1	Contact
      1 1	Advertising
      1 03	March