Why caffeine makes you sweat

kAm*@F 7:?:D9 J@FC D64@?5 4FA @7 4@7766[ 2?5 a_ >:?FE6D =2E6C[ J@FVC6 766=:?8 52>A] }@3@5J H2C?65 J@F 23@FE E9:D A2CE] pC6 42776:?6 2?5 DH62E:?8 6G6? 4@??64E65n *6D]k^Am

kAmq6=@H[ k2 9C67lQ9EEADi^^HHH]2I6]4@>Qmp)tk^2m[ E96 56@5@C2?E 3C2?5 7@C 8FJD[ D92C6D E96 >6492?:D> 369:?5 :E[ H96E96C 4@7766[ 6?6C8J 5C:?<D[ @C AC6\H@C<@FE DE24<:?8 >2<6D 2?J 5:776C6?46[ 2?5 9@H E@ DE2J 5CJ H:E9@FE 8:G:?8 FA J@FC 3C6H]k^Am

k9bmz6J %2<62H2JDk^9bm

kF=mk=: 52E2\=:DE\:E6>\:5lQ6_g2eh27eebc5_7h_e756a4db3c347d2cQmr2776:?6 C6GD FA J@FC 46?EC2= ?6CG@FD DJDE6>[ E96 D2>6 DJDE6> E92E E6==D J@FC DH62E 8=2?5D E@ 7:C6]k^=:mk=: 52E2\=:DE\:E6>\:5lQ622f2fd5e5bb3a247_a7fc3fd`g5a_gf3Qm$EC6DD DH62E 2?5 C68F=2C DH62E 4@>6 7C@> 5:776C6?E 8=2?5D[ 2?5 DEC6DD DH62E D>6==D DEC@?86C]k^=:mk=: 52E2\=:DE\:E6>\:5lQ6dbd`f2f4ac7f36gdce3ecbh5_bbg57h7Qmr@7766[ 6?6C8J 5C:?<D[ 2?5 AC6\H@C<@FE DE24<:?8 42? 2== >2<6 J@F DH62E] qFE :E’D E96 42776:?6[ ?@E E96 7@C>2E]k^=:mk=: 52E2\=:DE\:E6>\:5lQ6f24f62d7a54_dahehe3cgef__4b7``_6QmrC62E:?6 :D?VE E96 DH62E 4F=AC:E]k^=:mk=: 52E2\=:DE\:E6>\:5lQ65dhhh_55`ec`ag7b2gd7gb4`ehf_6333Qmp?E:A6CDA:C2?E[ 9J5C2E:@?[ 2?5 A24:?8 J@FC 4FA 362E BF:EE:?8 4@7766]k^=:mk^F=m

k9bm(9J s@6D r2776:?6 |2<6 *@F $H62Enk^9bm

kAmr2776:?6 :D 2 DE:>F=2?E[ 2?5 DE:>F=2?ED E2=< 5:C64E=J E@ J@FC ?6CG@FD DJDE6>] sC:?<:?8 2?JE9:?8 H:E9 42776:?6 24E:G2E6D J@FC 46?EC2= ?6CG@FD DJDE6>[ E96 D2>6 DJDE6> E92E 4@?EC@=D J@FC DH62E 8=2?5D] %92EVD H9J 2 4FA @7 4@7766 42? =62G6 J@F H:E9 2 =:89E DH62E 367@C6 k2 9C67lQ9EEADi^^962=E9]4=6G6=2?54=:?:4]@C8^H9J\5@\:\DH62E\D@\>F49QmJ@FVG6 6G6? 7:?:D965 5C:?<:?8 :Ek^2m]k^Am

kAm&?:=6G6C #U2>Ajs D4:6?E:DE |2EE p??6492C:4@ 3C62<D 5@H? 6I24E=J H9J] $=66A[ DEC6DD[ 42776:?6[ 2?5 2=4@9@= 2C6 2== =:?<65 E@ @?6 DJDE6>[ E96 2FE@?@>:4 ?6CG@FD DJDE6>[ 6DD6?E:2==J J@FC 7:89E\@C\7=:89E C6DA@?D6[ 96 6IA=2:?D] Qx?4C62D65 4@CE:D@= 7C@> 2 =24< @7 D=66A[ @C 42776:?6 2?5 2=4@9@= :?4C62D:?8 E96 962CE C2E6[ 42? 2== 4@?EC:3FE6 E@ A2EE6C?D @7 :?4C62D65 DH62E:?8[Q p??6492C:4@ D2JD]k^Am

kAmv6?6E:4D[ 7:E?6DD =6G6=[ 2?5 3@5J D:K6 2== A=2J 2 C@=6[ E@@[ H9:49 :D A2CE @7 k2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^:C=^H9J\5@\:\DH62E\>@C6\E92?\@E96CD]9E>=QmH9J D@>6 8FJD DH62E >@C6 E92? @E96CD :? 86?6C2=k^2m[ 6G6? 367@C6 42776:?6 6?E6CD E96 A:4EFC6]k^Am

k9bm$EC6DD $H62E GD] #68F=2C $H62Ek^9bm

kAm}@E 2== DH62E :D E96 D2>6] #68F=2C DH62E :D >@DE=J H2E6C[ D@ :E 32C6=J D>6==D @? :ED @H?] $EC6DD DH62E 4@>6D 7C@> 2 5:776C6?E D6E @7 8=2?5D 4@?46?EC2E65 :? E96 2C>A:ED 2?5 8C@:?] xE 4@?E2:?D AC@E6:?D 2?5 72ED E92E 324E6C:2 C62==J =:<6 E@ 7665 @?[ 2?5 E92E AC@46DD =62G6D J@F H:E9 3@5J @5@C]k^Am

kAmr2776:?6 42? EC:886C 3@E9 <:?5D 2E @?46i 2 ;@=E E@ J@FC ?6CG@FD DJDE6> E92E >:>:4D E96 7:89E\@C\7=:89E C6DA@?D6[ A=FD 2 >:=5 FAE:4< @7 J@FC 962CE C2E6 2?5 >6E23@=:D>[ >2<:?8 J@F 766= H2C>6C E92? FDF2=] k2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^8C@@>:?8^5@\?@E\=6E\DEC6DD\DH62E\8:G6\J@FC\82>6\2H2J]9E>=Qm$EC6DD DH62E 92AA6?Dk^2m E@ 6G6CJ@?6 D@@?6C @C =2E6C[ 3FE 42776:?6 ;FDE >2<6D :E 2 =:EE=6 >@C6 =:<6=J @? 2 C2?5@> %F6D52J]k^Am

k9bms@6D E96 r2776:?6 $@FC46 |2EE6Cn r@7766 GD] t?6C8J sC:?<D GD] !C6\(@C<@FE $E24<:?8k^9bm

kAm%96 42776:?6 D@FC46 5@6D ?@E C62==J >2EE6C[ 2E =62DE ?@E :? E96 H2J >@DE 8FJD 2DDF>6] xE 4@>6D 5@H? E@ 9@H >F49 42776:?6 J@FVC6 E2<:?8 :?[ ?@E H96C6 :E 4@>6D 7C@>]k^Am

k7:8FC6mk:>8 DC4lQ9EEADi^^:>286D]DE24<6C]4@>^H^`ag_^:>286D^DE@C:6D^a_ae^`_^ab^p)t\42776:?6_]A?8Q 2=ElQx?7@8C2A9:4 C6A@CE:?8 H9:49 42776:?6 D@FC46 A24<D E96 3:886DE AF?49]Q DEJ=6lQH:5E9i `__TQ ^mk7:842AE:@?mp)tk^7:842AE:@?mk^7:8FC6m

kAmkDEC@?8mr@7766k^DEC@?8mk^Am

kAmqC6H65 4@7766 92D C@F89=J hd >:==:8C2>D @7 42776:?6 A6C g\@F?46 4FA[ 6?@F89 E@ 3C:?8 @? 2 =:89E DH62E 7@C A=6?EJ @7 8FJD[ 6DA64:2==J @? 2? 6>AEJ DE@>249 @C DE24<65 @? E@A @7 2 D64@?5 @C E9:C5 4FA]k^Am

kAmkDEC@?8mt?6C8J 5C:?<Dk^DEC@?8mk^Am

kAmt?6C8J 5C:?<D A24< 2 D:>:=2C @C 9:896C 5@D6 :?E@ 2 4@=56C[ 72DE6C\E@\5C:?< 7@C>2E[ 2?5 E96 25565 DF82C 2?5 @E96C DE:>F=2?ED D@>6 3C2?5D :?4=F56 42? >2<6 E96 @G6C2== 67764E 766= >@C6 :?E6?D6[ 6G6? 2E 2 42776:?6 =6G6= D:>:=2C E@ 2 4FA @7 4@7766] s@4E@CD 2=D@ 7=28 6?6C8J 5C:?<D 2?5 42776:?6 DFAA=6>6?ED 2D 62D:6C E@ @G6C5@]k^Am

kAmkDEC@?8m!C6\H@C<@FEk^DEC@?8mk^Am

kAm!C6\H@C<@FE FDF2==J >62?D DE24<:?8 3@E9 42776:?6 2?5 4C62E:?6[ 3FE @?=J @?6 @7 E96> :D E96 DH62E 4F=AC:E] r2776:?6 :? 2 D4@@A :D EJA:42==J `d_ E@ b__ >:==:8C2>D[ >@C6 E92? 2 DEC@?8 4FA @7 4@7766[ 2?5 E92E 2=@?6 6IA=2:?D 2 =@E]k^Am

kAmrC62E:?6 86ED 3=2>65[ 3FE E96 D4:6?46 5@6D?VE 324< :E FA] x7 :E H6C6 >2<:?8 J@F DH62E >@C6[ J@FV5 6IA64E :E E@ D9@H FA 2D 569J5C2E:@? @C 962E :==?6DD[ 3FE k2 9C67lQ9EEADi^^=:?<]DAC:?86C]4@>^2CE:4=6^`_]``ge^D`ahf_\_`f\_`fb\KQm2E9=6E6D @? 4C62E:?6k^2m 24EF2==J D9@H65 =6DD @7 3@E9 4@>A2C65 E@ E9@D6 H9@ D<:AA65 :E] p?5 k2 9C67lQ9EEADi^^HHH]>2J@4=:?:4]@C8^5CF8D\DFAA=6>6?ED\4C62E:?6^2CE\a_bcfdh`Qm4C62E:?6VD @H? D276EJ AC@7:=6k^2m =:DED H6:89E 82:? 2D E96 @?=J D:56 67764E[ ?@E9:?8 23@FE DH62E[ ?@E9:?8 23@FE 3@5J E6>A6C2EFC6]k^Am

kAm$@ E96 DH62E 27E6C 2 D4@@An %92EVD 42776:?6 5@:?8 :ED E9:?8[ A=FD E96 92C56C D6DD:@? 4C62E:?6 ;FDE 96=A65 J@F AFD9 E9C@F89]k^Am

k9bmw@H E@ sC:?< r@7766 (:E9@FE E96 $H62E (2G6k^9bm

kAm*@F 5@?VE 92G6 E@ BF:E 42776:?6 E@ DE@A DH62E:?8 E9C@F89 J@FC D9:CE 3J `_ 2]>]k^Am

kAmkDEC@?8m$AC625 :E @FEk^DEC@?8mk^Am

kAm%H@ 4FAD 324<\E@\324< 9:ED J@FC DJDE6> 92C56C E92? E96 D2>6 EH@ 4FAD DA2465 2? 9@FC 2A2CE]k^Am

kAmkDEC@?8mt2E D@>6E9:?8 7:CDEk^DEC@?8mk^Am

kAmr2776:?6 @? 2? 6>AEJ DE@>249 E6?5D E@ 9:E 72DE6C 2?5 92C56C]k^Am

kAmkDEC@?8mz?@H J@FC 46:=:?8k^DEC@?8mk^Am

kAm&A E@ c__ >:==:8C2>D 2 52J[ 23@FE 7@FC 4FAD @7 4@7766[ :D k2 9C67lQ9EEADi^^HHH]>2J@4=:?:4]@C8^962=E9J\=:76DEJ=6^?FEC:E:@?\2?5\962=E9J\62E:?8^:?\56AE9^42776:?6^2CE\a__cdefgQm4@?D:56C65 D276k^2m 7@C >@DE 25F=ED] $E2J:?8 F?56C E92E 2=D@ <66AD E96 ;:EE6CJ[ D92<J D:56 @7 42776:?6 :? 4964<[ 2?5 =6DD ?6CG@FD DJDE6> DE:>F=2E:@? 86?6C2==J >62?D =6DD DH62E[ E@@]k^Am

kAmkDEC@?8m(2E49 E96 DE24<:?8k^DEC@?8mk^Am

kAmr@7766 :? E96 >@C?:?8[ 2? 6?6C8J 5C:?< 2E =F?49[ 2?5 2 AC6\H@C<@FE D4@@A 367@C6 9:EE:?8 E96 8J> 255 FA 72DE]k^Am

k9bmw@H E@ $E2J r@@= 2?5 sCJ (:E9@FE v:G:?8 &A *@FC |@C?:?8 r@7766k^9bm

kAm}@3@5JVD 2D<:?8 J@F E@ BF:E 42776:?6] yFDE 2 76H D>2== 25;FDE>6?ED[ 2?5 >@DE @7 E96> E2<6 =6DD 677@CE E92? >2<:?8 E92E 4@7766 :? E96 7:CDE A=246]k^Am

kAmkDEC@?8m#6249 7@C 2?E:A6CDA:C2?E[ ?@E ;FDE 56@5@C2?Ek^DEC@?8mk^Am

kAmp 3@5J DAC2J D>6==D 8C62E 2?5 4@G6CD @5@C[ 3FE @?=J 2?E:A6CDA:C2?E C65F46D DH62E 2E E96 D@FC46] x7 42776:?6VD 8@E J@F CF??:?8 H2C>[ =6E 2?E:A6CDA:C2?E 5@ E96 962GJ =:7E:?8] {@@< 7@C 2 >6?VD 7@C>F=2 H:E9 C62= DE2J:?8 A@H6C] cg 9@FCD :D 2 D@=:5 36?49>2C<]k^Am

kAmp=H2JD 2AA=J :E E@ 4=62?[ 5CJ D<:?] v6EE:?8 E92E 32D:4 DE6A C:89E >2EE6CD ;FDE 2D >F49 2D E96 D46?E J@F A:4<]k^Am

kAmkDEC@?8mwJ5C2E6 H:E9 J@FC 4@7766k^DEC@?8mk^Am

kAmsC:?<:?8 2 8=2DD @7 H2E6C 27E6C J@FC 4@7766 H@?VE 42?46= @FE E96 42776:?6] xE <66AD J@F 7C@> CF??:?8 5CJ @? E@A @7 DH62E:?8 >@C6]k^Am

kAmkDEC@?8mz?@H H96? :EVD 3:886C E92? 42776:?6k^DEC@?8mk^Am

kAm$@>6E:>6D 4@7766VD ;FDE E96 62DJ D42A68@2E] x7 DH62E :D 7@==@H:?8 J@F 2C@F?5 H2J 36J@?5 J@FC >@C?:?8 4FA[ :EVD H@CE9 F?56CDE2?5:?8 k2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^:C=^H9J\H6\DH62E]9E>=QmH9J J@FC 3@5J DH62EDk^2m 2?5 9@H E@ k2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^8C@@>:?8^9@H\E@\DE@A\DH62E:?8\D@\>F49]9E>=Qm>2?286 :Ek^2m] xEVD 2=D@ H@CE9 2 4@?G6CD2E:@? H:E9 J@FC 5@4E@C :7 :EVD 27764E:?8 J@FC 52J]k^Am

k9bmup"Dk^9bm

kAmkDEC@?8m(9J 5@ x DH62E :>>65:2E6=J 27E6C 5C:?<:?8 4@7766nk^DEC@?8mk^Am

kAmr2776:?6 24E:G2E6D J@FC 46?EC2= ?6CG@FD DJDE6>[ 2?5 E92E DJDE6> 4@?EC@=D J@FC DH62E 8=2?5D] %96 72DE EFC?2C@F?5 :D ?@C>2=]k^Am

kAmkDEC@?8mxD DH62E:?8 7C@> 42776:?6 2 D:8? @7 42776:?6 D6?D:E:G:EJ @C :?E@=6C2?46nk^DEC@?8mk^Am

kAm}@E FDF2==J] p =:EE=6 DH62E 27E6C J@FC FDF2= 4FA :D 2 ?@C>2= ?6CG@FD DJDE6> C6DA@?D6]k^Am

kAmkDEC@?8mr2? 5C:?<:?8 42776:?6 42FD6 ?:89E DH62EDnk^DEC@?8mk^Am

kAmxEVD @? E96 =:DE[ 3FE :EVD ?@E E96 >2:? DFDA64E] r2776:?6 :D 4@>>@?=J 7=28865 2D @?6 923:E H@CE9 4FEE:?8 324< @? :7 ?:89E DH62ED <66A D9@H:?8 FA[ k2 9C67lQ9EEADi^^>J]4=6G6=2?54=:?:4]@C8^962=E9^DJ>AE@>D^`edea\?:89E\DH62EDQm2=@?8D:56 @E96C A@DD:3=6 EC:886CDk^2m] %92EVD 2 5:776C6?E D:EF2E:@? 7C@> k2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^:C=^DH62E:?8\H9:=6\D:4<\2?5\9@H\E@\562=]9E>=QmDH62E:?8 H9:=6 D:4<k^2m[ H9:49 :D J@FC 3@5J CF??:?8 2 76G6C[ ?@E C624E:?8 E@ 2 DE:>F=2?E]k^Am

kAmkDEC@?8mw@H 42? x DE@A DH62E:?8 27E6C 5C:?<:?8 4@7766 @C 6?6C8J 5C:?<Dnk^DEC@?8mk^Am

kAm$=@H J@FC A246[ 62E D@>6E9:?8[ 2?5 DE2J 9J5C2E65] p?E:A6CDA:C2?E 92?5=6D E96 2C>A:ED]k^Am

kAmkDEC@?8ms@6D 42776:?6 DH62E D>6== H@CD6 E92? C68F=2C DH62Enk^DEC@?8mk^Am

kAmxE 42?[ 3FE 3=2>6 E96 DEC6DD C6DA@?D6[ ?@E E96 42776:?6] $H62E EC:886C65 3J DEC6DD @C 2 DE:>F=2?E E6?5D E@ 4@>6 7C@> E96 D2>6 8=2?5D 369:?5 DEC6DD DH62E] %96 <:?5 E92E =625D E@ q]~][ ?@E E96 H2E6CJ <:?5 J@F 86E 7C@> 962E @C 6I6C4:D6]k^Am

kAmkDEC@?8m(92E 2C6 E96 D:8?D @7 E@@ >F49 42776:?6nk^DEC@?8mk^Am

kAmy:EE6C:?6DD[ 2 C24:?8 962CE[ 6=6G2E65 3=@@5 AC6DDFC6[ 2?5 766=:?8 F?FDF2==J 2?I:@FD 2C6 E96 EJA:42= D:8?D] t?6C8J 5C:?<D 2?5 42776:?6 DFAA=6>6?ED 2C6 6DA64:2==J 62DJ E@ @G6C5@ 4@>A2C65 E@ 2 C68F=2C 4FA @7 4@7766] p =:EE=6 DH62E H:E9 J@FC FDF2= 4FA :D ?@C>2=] $92<:?6DD @C C62= 5:D4@>7@CE @? E@A @7 :E >62?D J@FVG6 AC@323=J k2 9C67lQ9EEADi^^HHH]2>2\2DD?]@C8^AF3=:4\962=E9^AC6G6?E:@?\H6==?6DD^H92E\5@4E@CD\H2?E\A2E:6?ED\<?@H\23@FE\:>A24E\42776:?6Qm925 >@C6 E92? J@FC 3@5J H2?EDk^2m]k^Am

kAmkDEC@?8mr2? J@F DH62E @FE 42776:?6nk^DEC@?8mk^Am

kAm}@E :? 2?J >62?:?87F= H2J] r2776:?6 :D 3C@<6? 5@H? >@DE=J 3J 6?KJ>6D :? J@FC =:G6C[ 244@C5:?8 E@ E96 p>6C:42? |65:42= pDD@4:2E:@?[ H:E9 @?=J 2 D>2== 7C24E:@? =62G:?8 E9C@F89 A66] %:>6 4=62CD :E[ ?@E DH62E]k^Am

kAm*@F 5@?’E ?665 E@ 5:E49 E96 4@7766 3642FD6 @7 2 =:EE=6 6IEC2 DH62E] xE’D ;FDE J@FC ?6CG@FD DJDE6> 5@:?8 6I24E=J H92E :EVD 3F:=E E@ 5@] !246 J@FC 42776:?2E65 5C:?<D 2?5 D92<6D[ <66A H2E6C H:E9:? C6249[ 2?5 =6E 2 D@=:5 2?E:A6CDA:C2?E <66A J@F 7C6D9 2?5 4@>7@CE23=6 E9C@F89@FE J@FC 52J]k^Am

kAmk2 9C67lQ9EEADi^^HHH]2I6]4@>^FD^6?^:?DA:C2E:@?^:C=^5@6D\42776:?6\>2<6\J@F\DH62E\>@C6]9E>=Qmk6>m%9:D DE@CJk^6>mk^2mk6>m H2D AC@5F465 3Jk^6>m k2 9C67lQ9EEADi^^HHH]2I6]4@>Qmk6>mp)tk^6>mk^2mk6>m 2?5 C6G:6H65 2?5 5:DEC:3FE65 3Jk^6>m k2 9C67lQ9EEADi^^9F3D]=2^"_b<=8$#_Q C6=lQ?@7@==@HQmk6>m$E24<6Ck^6>mk^2mk6>m]k^6>mk^Am