What is Biodroga Expert Acids Glycolic Acid Peel 35%?
Biodroga Medical Institute Expert Acids Glycolic Acid Peel 35% is the middle step of Biodroga’s three-step Expert Acids glycolic ladder. The ladder runs 20/35/50% and belongs to the brand’s Medical Institute line.
Glycolic acid remains the active throughout the range. What changes between strengths is the concentration and, with it, the pH. Here, the pH drops to a lower, more assertive level than in the entry-level peel.
It serves as an in-treatment step-up, not a starting point. It is for estheticians moving a client further along an acid-peel protocol. Specifically, it comes in once the skin has shown it can handle exfoliation at the milder strength.
Key benefits of Biodroga Expert Acids Glycolic Acid Peel 35%
- A deliberate intensification step: the lower pH at 35% is formulated to push resurfacing further than the entry strength delivers. This plays out over a course of treatments.
- Helps fade the look of past pigmentation and also supports a brighter, more even complexion with continued sessions.
- Softens the appearance of fine lines as part of a longer exfoliation series.
- Fits a mix-and-match protocol: estheticians can combine it in equal parts with other Biodroga Expert Acids, such as salicylic or mandelic acid. This option suits skin that already tolerates a stronger combination.
Key ingredients
Biodroga names a single active for this peel: glycolic acid, concentrated to 35% in this bottle. Glycolic acid is the smallest-molecule alpha-hydroxy acid in common use. It comes from materials such as sugar cane and unripe grapes. It also ranks as the reference AHA for professional resurfacing work.
At this step, the formula sits at roughly pH 2.5. That is noticeably lower than the roughly pH 3.0 of the entry-level 20% peel in the same range. This lower pH is the mechanism behind its stronger effect at a matched contact time.
However, Biodroga has not released a full INCI list for this Expert Acids peel. For this reason, this section covers only the named active and pH.
How to use Biodroga Expert Acids Glycolic Acid Peel 35%
- Combine up to three Expert Acids in equal parts (6 ml total), or apply this 35% peel on its own.
- Spread the mixture evenly over cleansed skin; add 6 ml more if the treatment extends to the neck and décolleté.
- Because this strength runs lower-pH than the entry step, plan a shorter contact window. Watch the skin’s response closely as it develops, then rinse fully with water.
- Neutralize with Biodroga’s Acid Peel Neutralizer for roughly 30 seconds before removing.
- Finally, close out with the client’s normal skincare routine and daily SPF.
For professional use by experienced, licensed estheticians only. Confirm the client has already tolerated a 20% peel before stepping up to this concentration. Patch-test as a matter of course. Also reinforce strict daily sun protection around the full treatment window.
Who it is for
Keep this strength for clients whose skin has already been through at least one round of milder glycolic exfoliation. That skin should also be ready for a more assertive step. A typical plan runs 5 to 6 sessions, spaced roughly 10 to 14 days apart as tolerance builds. It’s a professional escalation tool, not a first peel and not a product meant for unsupervised or home use.
Retail size vs. professional size
Biodroga’s Expert Acids line, including this 35% concentration, ships only in this 1 fl. oz. (30 ml) professional bottle for in-treatment use. There is no separate retail take-home version of this peel at any strength in the range.






