| | | Azelaic acid | Hyaluronic acid | Polyglutamic acid | Salicylic acid | Tranexamic acid | AHA (glycolic acid, lactic acid, etc.) | Bakuchiol | Beta-glucan | Caffeine | Plant Collagen | Derivatives of Vitamin C | Dihydroxyacetone (DHA) | Natural Moisturizing Factors (NMF) | Niacinamide | PHA (gluconolactone) | Retinoids | Squalane | Vitamin B12 |
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| | Serum Typology | Mattifying Serum (L35) | Moisturising serum (A31) | Plumping serum (A32) | Imperfection-Targeting Serum (L61) | Serum for hyperpigmentation and loss of firmness (A33) | Exfoliating serum (L63) | Night-time blemish-control serum (L62) | Soothing serum comprising nine ingredients (D31) | Under-eye dark circles and puffiness serum (L33) | Wrinkle and Firmness Serum (A34) | Radiance Serum (L32) | Progressive self-tanning serum (L31) | Two-phase Restorative Serum (C30) | Unifying Serum (L36) | Mark-correcting serum (L64) | Anti-wrinkle & fine-line serum (A61) | Nourishing serum (L34) | After-Sun Serum (L30) |
| Azelaic acid | Mattifying Serum (L35) | / | (1) Azelaic acid and (2) Hyaluronic acid | (1) Polyglutamic acid and (2) Azelaic acid | (1) Azelaic acid and (2) Salicylic acid for topical use / Only in the evening | Compatible / No order of preference | (1) AHAs and (2) Azelaic Acid / Only in the evening | (1) Azelaic acid and (2) Bakuchiol | (1) Beta-glucan and (2) Azelaic acid | (1) Caffeine around the eye-contour area and (2) Azelaic acid, avoiding that zone | Compatible / No order of preference | (1) Azelaic acid and (2) Vitamin C derivatives | (1) Azelaic acid and (2) DHA / Only in the evening | (1) Azelaic acid and (2) FNH | (1) Niacinamide and (2) Azelaic acid | (1) Azelaic acid and (2) PHA topically / For evening use only(1) Azelaic acid and (2) PHA topically | (1) Azelaic acid and (2) Retinoids / Only in the evening | (1) Azelaic acid and (2) Squalane | Compatible / No order of preference |
| Hyaluronic acid | Moisturising serum (A31) | (1) Azelaic acid and (2) Hyaluronic acid | / | Compatible / No order of preference | (1) Hyaluronic acid and (2) Salicylic acid applied topically / Use only in the evening | (1) Hyaluronic Acid and (2) Tranexamic Acid | (1) AHAs and (2) Hyaluronic Acid / Use only in the evening | (1) Hyaluronic Acid and (2) Bakuchiol | (1) Beta-glucan and (2) Hyaluronic Acid | (1) Caffeine around the eyes and (2) Hyaluronic acid while avoiding the area | (1) Plant-based collagen and (2) Hyaluronic acid | (1) Hyaluronic acid and (2) Vitamin C derivatives | (1) Hyaluronic Acid and (2) DHA / To be used only in the evening | (1) Hyaluronic Acid and (2) FNH | (1) Niacinamide and (2) Hyaluronic Acid | (1) Hyaluronic acid and (2) PHA applied topically | (1) Hyaluronic Acid and (2) Retinoids / Use exclusively at night | (1) Hyaluronic Acid and (2) Squalane | (1) Vitamin B12 and (2) Hyaluronic Acid |
| Polyglutamic acid | Plumping serum (A32) | (1) Polyglutamic acid and (2) Azelaic acid | Compatible / No order of preference | / | (1) Polyglutamic acid and (2) Topical salicylic acid / Night-time use only | (1) Polyglutamic acid and (2) Tranexamic acid | (1) Polyglutamic acid and (2) AHA / Use only in the evening | (1) Polyglutamic acid and (2) Bakuchiol | (1) Polyglutamic Acid and (2) Beta-Glucan | (1) Caffeine around the eyes and (2) Polyglutamic acid avoiding the area | (1) Polyglutamic Acid and (2) Plant Collagen | (1) Polyglutamic acid and (2) Vitamin C derivatives | (1) Polyglutamic Acid and (2) DHA / Use Only in the Evening | (1) Polyglutamic acid and (2) NHF | (1) Polyglutamic acid and (2) Niacinamide | (1) Polyglutamic acid and (2) local PHA | (1) Polyglutamic acid and (2) Retinoids / Use only at night | (1) Polyglutamic Acid and (2) Squalane | (1) Polyglutamic acid and (2) Vitamin B12 |
| Salicylic acid | Imperfection-Targeting Serum (L61) | (1) Azelaic acid and (2) Salicylic acid for topical use / Only in the evening | (1) Hyaluronic acid and (2) Salicylic acid applied topically / Use only in the evening | (1) Polyglutamic acid and (2) Topical salicylic acid / Night-time use only | / | (1) Tranexamic acid and (2) Salicylic acid applied topically / Only in the evening | To be used on different days / Only in the evening | (1) Bakuchiol and (2) Topical Salicylic Acid | (1) Beta-glucan and (2) Salicylic acid applied topically / In the evening only | For topical application / Only in the evening | (1) Plant-based collagen and (2) Salicylic acid for targeted application / Use exclusively in the evening | (1) Vitamin C derivatives and (2) Topical salicylic acid / Use only at night | Counterproductive / Use on different days | (1) NAF and (2) Topical Salicylic Acid / Only in the evening | (1) Niacinamide and (2) Salicylic Acid applied topically / Only in the evening | Compatible / No order of preference / For local application | (1) Retinoids and (2) Salicylic Acid applied topically / Exclusively evenings | (1) Squalane and (2) Salicylic Acid applied topically / For evening use only | (1) Vitamin B12 and (2) Topical Salicylic Acid / Use only in the evening |
| Tranexamic acid | Serum for hyperpigmentation and loss of firmness (A33) | Compatible / No order of preference | (1) Hyaluronic Acid and (2) Tranexamic Acid | (1) Polyglutamic acid and (2) Tranexamic acid | (1) Tranexamic acid and (2) Salicylic acid applied topically / Only in the evening | / | (1) AHAs and (2) Tranexamic Acid / For evening use only | (1) Tranexamic acid and (2) Bakuchiol | Compatible / No order of preference | (1) Caffeine around the eyes and (2) Tranexamic acid while avoiding the area | Compatible / No order of preference | (1) Tranexamic acid and (2) Vitamin C derivatives | (1) Tranexamic Acid and (2) DHA / Only in the evening | (1) Tranexamic Acid and (2) FNH | (1) Niacinamide and (2) Tranexamic Acid | (1) Tranexamic acid and (2) PHA applied topically | (1) Tranexamic Acid and (2) Retinoids / Use Only in the Evening | (1) Tranexamic acid and (2) Squalane | Compatible / No order of preference |
| AHA (glycolic acid, lactic acid, etc.) | Exfoliating serum (L63) | (1) AHAs and (2) Azelaic Acid / Only in the evening | (1) AHAs and (2) Hyaluronic Acid / Use only in the evening | (1) Polyglutamic acid and (2) AHA / Use only in the evening | To be used on different days / Only in the evening | (1) AHAs and (2) Tranexamic Acid / For evening use only | / | (1) AHA and (2) Bakuchiol / For use only in the evening | (1) AHA and (2) Beta-glucan / For use exclusively at night | (1) Caffeine for the eye contour and (2) AHA while avoiding the area / Only in the evening | (1) AHAs and (2) Plant-Derived Collagen / Only in the Evening | (1) AHAs and (2) Vitamin C Derivatives / Use Only in the Evening | Counterproductive / Use on different days | (1) AHA and (2) FNHA / For evening use only | (1) Niacinamide and (2) AHA / Use only in the evening | (1) AHA and (2) PHA applied topically / Only in the evening | Alternate every other night / Test beforehand / Only in the evening | (1) AHA and (2) Squalane / Use only in the evening | (1) AHAs and (2) Vitamin B12 / Only at night |
| Bakuchiol | Night-time blemish-control serum (L62) | (1) Azelaic acid and (2) Bakuchiol | (1) Hyaluronic Acid and (2) Bakuchiol | (1) Polyglutamic acid and (2) Bakuchiol | (1) Bakuchiol and (2) Topical Salicylic Acid | (1) Tranexamic acid and (2) Bakuchiol | (1) AHA and (2) Bakuchiol / For use only in the evening | / | (1) Beta-glucan and (2) Bakuchiol | (1) Caffeine around the eyes and (2) Bakuchiol while avoiding the area | (1) Plant-based collagen and (2) Bakuchiol | (1) Vitamin C Derivatives and (2) Bakuchiol | Counterproductive / Use on different days | (1) HNF and (2) Bakuchiol | (1) Niacinamide and (2) Bakuchiol | (1) Bakuchiol and (2) PHA for topical use | Compatible / No preference order / Evening only | Compatible / No order of preference | (1) Vitamin B12 and (2) Bakuchiol |
| Beta-glucan | Soothing serum comprising nine ingredients (D31) | (1) Beta-glucan and (2) Azelaic acid | (1) Beta-glucan and (2) Hyaluronic Acid | (1) Polyglutamic Acid and (2) Beta-Glucan | (1) Beta-glucan and (2) Salicylic acid applied topically / In the evening only | Compatible / No order of preference | (1) AHA and (2) Beta-glucan / For use exclusively at night | (1) Beta-glucan and (2) Bakuchiol | / | (1) Caffeine around the eyes and (2) Beta-glucan while avoiding the area | Compatible / No order of preference | (1) Beta-glucan and (2) Vitamin C Derivatives | (1) Beta-glucan and (2) DHA / Only in the evening | (1) Beta-glucan and (2) NAFLD | (1) Niacinamide and (2) Beta-glucan | (1) Beta-glucan and (2) Topical PHA | (1) Beta-glucan and (2) Retinoids / Use only in the evening | (1) Beta-glucan and (2) Squalane | Compatible / No order of preference |
| Caffeine | Under-eye dark circles and puffiness serum (L33) | (1) Caffeine around the eye-contour area and (2) Azelaic acid, avoiding that zone | (1) Caffeine around the eyes and (2) Hyaluronic acid while avoiding the area | (1) Caffeine around the eyes and (2) Polyglutamic acid avoiding the area | For topical application / Only in the evening | (1) Caffeine around the eyes and (2) Tranexamic acid while avoiding the area | (1) Caffeine for the eye contour and (2) AHA while avoiding the area / Only in the evening | (1) Caffeine around the eyes and (2) Bakuchiol while avoiding the area | (1) Caffeine around the eyes and (2) Beta-glucan while avoiding the area | / | (1) Caffeine around the eyes and (2) Plant-based collagen avoiding the area | (1) Caffeine around the eyes and (2) Vitamin C derivatives while avoiding the area | (1) Caffeine for the eye contour and (2) DHA, avoiding the area / Use only at night | (1) Caffeine around the eyes and (2) avoiding the area with NNF | (1) Caffeine around the eyes and (2) Niacinamide avoiding the area | (1) Caffeine around the eyes and (2) PHA applied locally while avoiding the area | (1) Caffeine applied around the eyes and (2) Retinoids, avoiding the eye area / At night only | (1) Caffeine around the eyes and (2) Squalane while avoiding the area | (1) Caffeine around the eyes and (2) Vitamin B12 avoiding the area |
| Plant Collagen | Wrinkle and Firmness Serum (A34) | Compatible / No order of preference | (1) Plant-based collagen and (2) Hyaluronic acid | (1) Polyglutamic Acid and (2) Plant Collagen | (1) Plant-based collagen and (2) Salicylic acid for targeted application / Use exclusively in the evening | Compatible / No order of preference | (1) AHAs and (2) Plant-Derived Collagen / Only in the Evening | (1) Plant-based collagen and (2) Bakuchiol | Compatible / No order of preference | (1) Caffeine around the eyes and (2) Plant-based collagen avoiding the area | / | Compatible / No order of preference | (1) Plant Collagen and (2) DHA / For Evening Use Only | (1) Plant-based collagen and (2) NCF | (1) Niacinamide and (2) Plant Collagen | (1) Plant-based collagen and (2) PHA locally | (1) Plant-Based Collagen and (2) Retinoids / Only in the Evening | (1) Plant-based collagen and (2) Squalane | Compatible / No order of preference |
| Derivatives of Vitamin C | Radiance Serum (L32) | (1) Azelaic acid and (2) Vitamin C derivatives | (1) Hyaluronic acid and (2) Vitamin C derivatives | (1) Polyglutamic acid and (2) Vitamin C derivatives | (1) Vitamin C derivatives and (2) Topical salicylic acid / Use only at night | (1) Tranexamic Acid and (2) DHA / Only in the evening | (1) AHAs and (2) Vitamin C Derivatives / Use Only in the Evening | (1) Vitamin C Derivatives and (2) Bakuchiol | (1) Beta-glucan and (2) Vitamin C Derivatives | (1) Caffeine around the eyes and (2) Vitamin C derivatives while avoiding the area | Compatible / No order of preference | / | (1) Vitamin C Derivatives and (2) DHA / Use Only in the Evening | (1) Non-haem iron and (2) Vitamin C derivatives | (1) Niacinamide and (2) Vitamin C Derivatives | (1) Derivatives of vitamin C and (2) local PHA | (1) Derivatives of Vitamin C and (2) Retinoids / Use exclusively in the evening | (1) Vitamin C Derivatives and (2) Squalane | (1) Vitamin B12 and (2) Derivatives of Vitamin C |
| Dihydroxyacetone (DHA) | Progressive self-tanning serum (L31) | (1) Azelaic acid and (2) DHA / Only in the evening | (1) Hyaluronic Acid and (2) DHA / To be used only in the evening | (1) Polyglutamic Acid and (2) DHA / Use Only in the Evening | Counterproductive / Use on different days | (1) Tranexamic Acid and (2) DHA / Only in the evening | Counterproductive / Use on different days | Counterproductive / Use on different days | (1) Beta-glucan and (2) DHA / Only in the evening | (1) Caffeine for the eye contour and (2) DHA, avoiding the area / Use only at night | (1) Plant Collagen and (2) DHA / For Evening Use Only | (1) Vitamin C Derivatives and (2) DHA / Use Only in the Evening | / | Counterproductive / Use on different days | (1) Niacinamide and (2) DHA / Use only in the evening | Counterproductive / Use on different days | Counterproductive / Use on different days | Counterproductive / Use on different days | (1) Vitamin B12 and (2) DHA / Only in the evening |
| Natural Moisturizing Factors (NMF) | Two-phase Restorative Serum (C30) | (1) Azelaic acid and (2) FNH | (1) Hyaluronic Acid and (2) FNH | (1) Polyglutamic acid and (2) NHF | (1) NAF and (2) Topical Salicylic Acid / Only in the evening | (1) Tranexamic Acid and (2) FNH | (1) AHA and (2) FNHA / For evening use only | (1) HNF and (2) Bakuchiol | (1) Beta-glucan and (2) NAFLD | (1) Caffeine around the eyes and (2) avoiding the area with NNF | (1) Plant-based collagen and (2) NCF | (1) Non-haem iron and (2) Vitamin C derivatives | Counterproductive / Use on different days | / | (1) Niacinamide and (2) FNH | (1) NHS and (2) PHA locally | (1) NFH and (2) Retinoids / For evening use only | Compatible / No order of preference | (1) Vitamin B12 and (2) NFH |
| Niacinamide | Unifying Serum (L36) | (1) Niacinamide and (2) Azelaic acid | (1) Niacinamide and (2) Hyaluronic Acid | (1) Polyglutamic acid and (2) Niacinamide | (1) Niacinamide and (2) Salicylic Acid applied topically / Only in the evening | (1) Niacinamide and (2) Tranexamic Acid | (1) Niacinamide and (2) AHA / Use only in the evening | (1) Niacinamide and (2) Bakuchiol | (1) Niacinamide and (2) Beta-glucan | (1) Caffeine around the eyes and (2) Niacinamide avoiding the area | (1) Niacinamide and (2) Plant Collagen | (1) Niacinamide and (2) Vitamin C Derivatives | (1) Niacinamide and (2) DHA / Use only in the evening | (1) Niacinamide and (2) FNH | / | (1) Niacinamide and (2) PHA topically | (1) Niacinamide and (2) Retinoids / Only in the evening | (1) Niacinamide and (2) Squalane | (1) Niacinamide and (2) Vitamin B12 |
| PHA (gluconolactone) | Mark-correcting serum (L64) | (1) Azelaic acid and (2) PHA topically | (1) Hyaluronic acid and (2) PHA applied topically | (1) Polyglutamic acid and (2) local PHA | Compatible / No order of preference / For local application | (1) Tranexamic acid and (2) PHA applied topically | (1) AHA and (2) PHA applied topically / Only in the evening | (1) Bakuchiol and (2) PHA for topical use | (1) Beta-glucan and (2) Topical PHA | (1) Caffeine around the eyes and (2) PHA applied locally while avoiding the area | (1) Plant-based collagen and (2) PHA locally | (1) Derivatives of vitamin C and (2) local PHA | Counterproductive / Use on different days | (1) NHS and (2) PHA locally | (1) Niacinamide and (2) PHA topically | / | (1) Retinoids and (2) PHA topically / Only in the evening | (1) Squalane and (2) PHA applied topically | (1) Vitamin B12 and (2) PHA applied locally |
| Retinoids | Anti-wrinkle & fine-line serum (A61) | (1) Azelaic acid and (2) Retinoids / Only in the evening | (1) Hyaluronic Acid and (2) Retinoids / Use exclusively at night | (1) Polyglutamic acid and (2) Retinoids / Use only at night | (1) Retinoids and (2) Salicylic Acid applied topically / Exclusively evenings | (1) Tranexamic Acid and (2) Retinoids / Use Only in the Evening | Alternate every other night / Test beforehand / Only in the evening | Compatible / No preference order / Evening only | (1) Beta-glucan and (2) Retinoids / Use only in the evening | (1) Caffeine applied around the eyes and (2) Retinoids, avoiding the eye area / At night only | (1) Plant-Based Collagen and (2) Retinoids / Only in the Evening | (1) Derivatives of Vitamin C and (2) Retinoids / Use exclusively in the evening | Counterproductive / Use on different days | (1) NFH and (2) Retinoids / For evening use only | (1) Niacinamide and (2) Retinoids / Only in the evening | (1) Retinoids and (2) PHA topically / Only in the evening | / | (1) Squalane and (2) Retinoids / For use only in the evening | (1) Vitamin B12 and (2) Retinoids / Only in the evening |
| Squalane | Nourishing serum (L34) | (1) Azelaic acid and (2) Squalane | (1) Hyaluronic Acid and (2) Squalane | (1) Polyglutamic Acid and (2) Squalane | (1) Squalane and (2) Salicylic Acid applied topically / For evening use only | (1) Tranexamic acid and (2) Squalane | (1) AHA and (2) Squalane / Use only in the evening | Compatible / No order of preference | (1) Beta-glucan and (2) Squalane | (1) Caffeine around the eyes and (2) Squalane while avoiding the area | (1) Plant-based collagen and (2) Squalane | (1) Vitamin C Derivatives and (2) Squalane | Counterproductive / Use on different days | Compatible / No order of preference | (1) Niacinamide and (2) Squalane | (1) Squalane and (2) PHA applied topically | (1) Squalane and (2) Retinoids / For use only in the evening | / | (1) Vitamin B12 and (2) Squalane |
| Vitamin B12 | After-Sun Serum (L30) | Compatible / No order of preference | (1) Vitamin B12 and (2) Hyaluronic Acid | (1) Polyglutamic acid and (2) Vitamin B12 | (1) Vitamin B12 and (2) Topical Salicylic Acid / Use only in the evening | Compatible / No order of preference | (1) AHAs and (2) Vitamin B12 / Only at night | (1) Vitamin B12 and (2) Bakuchiol | Compatible / No order of preference | (1) Caffeine around the eyes and (2) Vitamin B12 avoiding the area | Compatible / No order of preference | (1) Vitamin B12 and (2) Derivatives of Vitamin C | (1) Vitamin B12 and (2) DHA / Only in the evening | (1) Vitamin B12 and (2) NFH | (1) Niacinamide and (2) Vitamin B12 | (1) Vitamin B12 and (2) PHA applied locally | (1) Vitamin B12 and (2) Retinoids / Only in the evening | (1) Vitamin B12 and (2) Squalane | / |