what type/form of mandelic acid is used in skin care products?

To clairify I need to know the chemical compound name (Example 1:
(+)-O-Acetyl-L-mandelic Acid) (Example 2: L-(+)-Mandelic Acid )
an example of some skin care products that use mandelic acid are:
(NuCelle Mandelic Serum 10% )

Current available forms of mandelic acid are as follows:

(-)-O-Acetyl-D-mandelic Acid 
(+)-O-Acetyl-L-mandelic Acid 
4-Bromo-DL-mandelic Acid 
4-Chloro-DL-mandelic Acid 
2-Chloro-D-mandelic Acid 
DL-3,4-Dihydroxymandelic Acid 
DL-4-Hydroxy-3-methoxymandelic Acid 
  (Vanillylmandelic Acid)
DL-4-Hydroxymandelic Acid Monohydrate
DL-4-Hydroxymandelic Acid Monohydrate
DL-Mandelic Acid 
DL-Mandelic Acid Ethyl Ester 
DL-Mandelic Acid Methyl Ester 
DL-Mandelic Acid Sodium Salt 
L-(+)-Mandelic Acid 
D-(-)-Mandelic Acid 
DL-Mandelic Acid Benzyl Ester 
DL-Mandelic Acid Isoamyl Ester 
Mandelic Acid 3,3,5-Trimethylcyclohexyl Ester 
DL-alpha-Methoxyphenylacetic Acid 
  (DL-O-Methylmandelic Acid)
L-(+)-Mandelic Acid Ethyl Ester 
D-(-)-Mandelic Acid Ethyl Ester 
D-(-)-Mandelic Acid Methyl Ester 
Methyl L-(+)-Mandelate 
  (L-(+)-Mandelic Acid Methyl Ester)
D-(-)-Mandelic Acid Benzyl Ester 
L-(+)-Mandelic Acid Benzyl Ester

Mandelic Acid(alpha-hydroxybenzeneacetic acid) is an 8-carbon
alpha-hydroxy acid with the chemical formula HOCH(C6H5)COOH. The
mandelic acid molecule is larger than the glycolic acid molecule, a
widely used AHA. In addition, mandelic acid, which has a pK of 3.41,
is stronger than glycolic acid, which has a pK of 3.83 (at 25C - the
acidity of AHAs may vary considerably with changes in temperature)
Mandelic Acid has a high melting point, is partially soluble in water,
and is freely soluble in isopropyl and ethyl alcohol.

It is supplied to the cosmetic industry by three companies. You can
find this out by searching at: http://www.ctfa-buyersguide.org/ for
mandelic acid. I'd suggest just calling them to ask what form they
supply.