💎 Serum
Peter Thomas Roth Potent-C Power Serum
80
Peter Thomas RothB
🌿Soothing💦Hydrating
👃Fragrance-Free💚Allergen-Free✅Paraben-Free🧪Alcohol-Free
Brightening Vitamin C serum with 20% THD Ascorbate, an advanced form of Vitamin C that is 50 times more powerful than traditional Vitamin C, helps defy 7 signs of aging* at once, helping to visibly improve the look of fine lines, wrinkles, uneven tone, loss of brightness, loss of firmness, uneven texture and dehydratio
View product ↗Description
Brightening Vitamin C serum with 20% THD Ascorbate, an advanced form of Vitamin C that is 50 times more powerful than traditional Vitamin C, helps defy 7 signs of aging* at once, helping to visibly improve the look of fine lines, wrinkles, uneven tone, loss of brightness, loss of firmness, uneven texture and dehydration.
Warnings
- •3 potential irritants in the formula — introduce gradually.
Ingredient Breakdown (8 INCI · 3 active)
- 0Aqua/Water
- 1THD Ascorbate
- 2Ferulic AcidACTIVE
- 3Vitamin EACTIVE
- 4Squalane
- 5Hyaluronic Acid
- 6Sodium Hyaluronate
- 9BisabololACTIVE
Product Info
Type
Serum
Price
$70.99
Certifications
👃 Fragrance-Free💚 Allergen-Free✅ Paraben-Free🧪 Alcohol-Free
Score Breakdown
Efficacy
80
🧪Ingredient Quality38.5 / 45
- ✓7 supporting actives (Tier 2)
🎯Concentration Signal13.5 / 15
- ⚠No % concentrations on the label — strength inferred from INCI order
- ↑Disclose the % of each headline active
🏆Evidence Backing13 / 15
- ✓Average evidence 87/100 across 9 matched actives
- ✓7 actives with strong evidence (≥80/100)
🧬Formulation Sophistication10.5 / 12
- ✓5 distinct ingredient classes — well-rounded formula
- ✓Synergy: Hyaluronic Acid + Glycerin · Tocopherol (Vitamin E) + Ferulic Acid
📋Functional Completeness4 / 8
- ✓Some category-appropriate actives present
- ↑Add the missing functional class for this product type
🛡️Base Formula Credit0 / 5
Safety
99
Starts at 100; each row below subtracts points up to its cap.
🔥Irritation Risk−3 / 18
- ✓3 mild ingredients flagged at low irritation only
🌿Fragrance0 / 10
- ✓Fragrance-free
⚠️Allergens0 / 10
- ✓No EU 26 fragrance allergens detected
🚫Endocrine Concern0 / 15
- ✓No ingredients flagged for endocrine activity
💎Comedogenicity−2.8 / 7
- ⚠Moderate comedogenic potential (avg 2.0/5)
🔀Formulation Conflicts0 / 10
- ✓No antagonistic ingredient combinations
✨Clean-Formula & Transparency+5 / 8
- ✓Short-ingredient-list bonus: +3.0
- ✓Transparency bonus: +2.0 (clear INCI disclosure)
Overall Score80/100
Overall = 50% Efficacy + 50% Safety. No bonus pad — hitting 100 requires both dimensions to be near-perfect. How scoring works →