Visit the MuscleTalk Shop - and check out our own range of MuscleTalk branded supplements at great prices with FREE delivery!

Phenylalanine allergy(what do u know about it)

Author
Feed_me
New Member
  • Total Posts : 23
  • Reward points: 2556
  • Joined: 2005/02/16 02:47:07
  • Location: Australia Mate
  • Status: offline
2005/06/09 02:36:54 (permalink)

Phenylalanine allergy(what do u know about it)

Hi,
Just wondering what people know or can tell me about phenallanine, i have searched a bit with heaps of conflicting points and wondered what people on here though....

Just as a background, years ago when pepsi max came out i drank a bottle of the **** and came up with a major skin rash. Im allergic to it and have many allergies to stuff(wheat tomato chicken blah blah) Currently im also at looking at buying protein powders with minimal phenal... if any one knows of any (even if it tastes terrible as they are usually used as a flavour enhancer).

If phenal is a amino acid does that mean every high protein food/powder has phenal?? If its essential then how the hell can i be allergic to it?

Thanks
Ric
#1

6 Replies Related Threads

    MuscleTalk Shop - Bodybuilding Supplements
    CheekyChappie
    Pro-Member
    • Total Posts : 6622
    • Reward points: 10851
    • Joined: 2002/04/08 10:56:28
    • Location: United Kingdom
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/09 13:39:15 (permalink)
    As far as I know, the only people who have issues with phenylalanine (which as you said ia an amino acid found in most protein containing foods) are those who are born with a condition called phenylketonuria. They cannot digest phenylalanine properly so it builds up in the body causing brain damage.

    However it is nearly always picked up at birth and dealt with. If not you are brain damaged by the time you are a toddler, so you don;t have to worry about having that!

    So basically this post doesn't answer your question!
    #2
    Feed_me
    New Member
    • Total Posts : 23
    • Reward points: 2556
    • Joined: 2005/02/16 02:47:07
    • Location: Australia Mate
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/10 01:19:35 (permalink)

    ORIGINAL: CheekyChappie

    As far as I know, the only people who have issues with phenylalanine (which as you said ia an amino acid found in most protein containing foods) are those who are born with a condition called phenylketonuria. They cannot digest phenylalanine properly so it builds up in the body causing brain damage.

    However it is nearly always picked up at birth and dealt with. If not you are brain damaged by the time you are a toddler, so you don;t have to worry about having that!

    So basically this post doesn't answer your question!


    Well wether i have brain damage is debatable

    but no I dont have PKU,
    thanks for your response

    Any human biology students out their who may no something????
    #3
    ink
    Moderator
    • Total Posts : 3141
    • Reward points: 5415
    • Joined: 2002/02/26 13:26:42
    • Location: Location not known
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/10 01:23:32 (permalink)
    PKU (as stated above) is the inability to convert phenylalanine to tyrosine. It therefore builds up and becomes toxic (for james )
    #4
    James
    Owner & Moderator
    • Total Posts : 48310
    • Reward points: 12059
    • Joined: 2000/11/10 18:09:18
    • Location: Northants, UK
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/10 17:06:24 (permalink)
    I have never herd of phenylalanine (phe) allergy. Only inborn errors of metabolism which are phe related, like PKU. However it is possible to be heterozygous PKU (ie one of the pair of genes is defective as opposed to the homozygous condition which is the classic case), and although this is a recessive gene, there maybe reduced activity and possibly 20% reduction in activity.

    This manifests asymptomatically in most people for their whole life and they never even know they are heterozygotes, but in others it is evident with minor confusion, and other minor symptoms. However this is NOT an allergy!

    I notice you refer to Pepsi Max - due to the aspartame which is 2 phe molecules bonded and the bond causes sweetness. However what you have read is just probably a load of anti-aspartame crap on the net (please everyone no debate on aspartame in this topic) - I'd ignor this.

    However even heterozygotes are picked up with the Guthrie test which is one of the compulsary post natal tests where PKU is tested for, and if significant the infant may foollw a PKU diet for a few years. The chances are you had that test.

    And you make the correct observation that all foods contain phe, so yes you'd have problems without aspartame

    Odd but I think they're just scaremoungering you about aspartame from what you've read


    James Collier - MuscleTalk Co-Owner

    #5
    Feed_me
    New Member
    • Total Posts : 23
    • Reward points: 2556
    • Joined: 2005/02/16 02:47:07
    • Location: Australia Mate
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/11 10:31:16 (permalink)
    ORIGINAL: James

    I have never herd of phenylalanine (phe) allergy. Only inborn errors of metabolism which are phe related, like PKU. However it is possible to be heterozygous PKU (ie one of the pair of genes is defective as opposed to the homozygous condition which is the classic case), and although this is a recessive gene, there maybe reduced activity and possibly 20% reduction in activity.

    This manifests asymptomatically in most people for their whole life and they never even know they are heterozygotes, but in others it is evident with minor confusion, and other minor symptoms. However this is NOT an allergy!

    I notice you refer to Pepsi Max - due to the aspartame which is 2 phe molecules bonded and the bond causes sweetness. However what you have read is just probably a load of anti-aspartame crap on the net (please everyone no debate on aspartame in this topic) - I'd ignor this.

    However even heterozygotes are picked up with the Guthrie test which is one of the compulsary post natal tests where PKU is tested for, and if significant the infant may foollw a PKU diet for a few years. The chances are you had that test.

    And you make the correct observation that all foods contain phe, so yes you'd have problems without aspartame

    Odd but I think they're just scaremoungering you about aspartame from what you've read




    Thanks James,
    Talked to the guy at the supplements store and ended up buying some optimum 100% natural whey, which says no aspartame but still small amount of phenylaline. Didnt have a reaction to it took it today for the first time. i was tested for pku as a new born so it isnt that..

    Still very confused about what i had the major skin reaction (entire body was covered in blotch red dots itchy as hell) after drinking pepsi max (can drink normal coke whatever) . James do you not believe in aspartame allergies? I understand what you are saying about reading stuff on the net!, do you know of anything else in pepsi max or diet softdrinks that could have caused a reaction?

    thanks for replies
    Ric
    post edited by Feed_me - 2005/06/11 10:33:44
    #6
    James
    Owner & Moderator
    • Total Posts : 48310
    • Reward points: 12059
    • Joined: 2000/11/10 18:09:18
    • Location: Northants, UK
    • Status: offline
    RE: Phenylalanine allergy(what do u know about it) 2005/06/13 17:16:05 (permalink)
    I's say aspartame 'allergies' are possible but very very rare. However intolerance to it would be possible, but then the symptoms manifested in you are typical or an allergic reaction. TBH there's alot of ingredients in colas like Pepsi Max - it's really hard to say. Stay off it for a while then re-try it and monitor symptoms

    James Collier - MuscleTalk Co-Owner

    #7
    Jump to:
    MuscleTalk Shop - Bodybuilding Supplements
    ©2014 All content is copyright of MuscleTalk.co.uk and its use elsewhere is prohibited. (posting guidelines | privacy | advertise | contact us | supported by)
    © 2014 APG vNext Commercial Version 5.0