| View previous topic :: View next topic |
| Author |
Message |
Paula
Guest
|
 Posted: Fri Feb 25, 2005 3:10 pm Post subject: R- lipoic acid |
 |
|
| I found this R-hydrolipoic acid gel . can you tell me if these other ingredients are ok ? other ingredients: gelatin, MCT oil, Vit E, rosemary extract, ascorbyl palmitate. |
|
| Back to top |
|
|
|
drtodorov
Site Admin
Joined: 10 Dec 2004
Posts: 3177
|
| Posted: Fri Feb 25, 2005 4:52 pm Post subject: |
|
|
| R-hydrolipoic acid is a metabolite of R-lipoic that is less stable on exposure to oxygen. It has not been studied in skin care, so I am not sure that result will be the same as with lipoic aicd. |
|
| Back to top |
|
|
|
cjdavis
Joined: 24 Jan 2005
Posts: 191
Location: Atlanta
|
| Posted: Tue Mar 08, 2005 12:27 am Post subject: |
|
|
| drtodorov wrote: | | R-hydrolipoic acid is a metabolite of R-lipoic that is less stable on exposure to oxygen. It has not been studied in skin care, so I am not sure that result will be the same as with lipoic aicd. |
That actually is a problem with R-ALA, it is extremely chemically unstable and reactive to light. One manufacturer told me that the bulk power needs to be shipped in refrigerated trucks to maintain stability. I can guarantee you that you will see less and less of the free base form of R-ALA and more salts. The problem with an R-ALA salt is that they may be poorly suited for topical application. |
|
| Back to top |
|
|
|
drtodorov
Site Admin
Joined: 10 Dec 2004
Posts: 3177
|
| Posted: Tue Mar 08, 2005 4:55 am Post subject: |
|
|
| Chris, I assume you meant R-alpha-hydrolipoic acid as being rather unstable. R-alpha lipoic acid (R-ALA) is reasonably stable, about the same as S form or racemate. |
|
| Back to top |
|
|
|
cjdavis
Joined: 24 Jan 2005
Posts: 191
Location: Atlanta
|
| Posted: Tue Mar 08, 2005 8:42 am Post subject: |
|
|
| drtodorov wrote: | | Chris, I assume you meant R-alpha-hydrolipoic acid as being rather unstable. R-alpha lipoic acid (R-ALA) is reasonably stable, about the same as S form or racemate. |
I did. Thanks for the correction. |
|
| Back to top |
|
|
|
|
