  
 Product Comparison
|
C SERUM |
C
FACTOR |
GREAT SKIN
C SERUM |
SKINCEUTICALS |
| Size |
1oz/30ml |
1oz/30ml |
1oz/30ml |
1oz/30ml |
| Price on
the Web |
$49.00 |
$39.95 |
$60.00 |
$60.00 |
| Primary Ingredient
(First Listed on Label) |
Ethoxydiglycol |
Ester-C®
Topical Concentrate* |
Ester-C®
Topical Concentrate* |
Ascorbic
Acid |
| Type of Vitamin
C |
L Ascorbic
Acid |
Ester-C®
Concentrate* |
Ester-C®
Concentrate* |
L Ascorbic
Acid |
| Life of C
at 90% effective at room temperature |
30 days |
760
days |
760 days |
30 days |
| Can be used
UnderMake-Up |
NO |
YES |
YES |
NO |
| Co-Q20(Anti-Oxidant) |
NO |
YES |
YES |
NO |
| Well Documented
Scientific Research |
None |
YES |
YES |
NA |
| PYCNOGENOL
reg.(Anti-Oxidant) |
NO |
YES |
YES |
NO |
| Percent of
active Vitamin C |
NA |
14.3% |
14.3% |
20% |
| Herbal Complex
to enhance performance |
NO |
YES |
YES |
NO |
| Ph Value |
NA |
3.5-4.0 |
3.5-4.0 |
less than
7.0 |
| Needs Separate
Moisturizer |
NA |
NO |
NO |
YES |
*Vitamin C: Ester-C®
Topical Concentrate (Pat.#4,822,826, #4,968,726, and #5,070,085)
|
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