# Theanine Page: https://lovi.care/skincare/nl/ingredients/theanine The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for the Netherlands. Oral and topical products with ingredients like l-theanine help reduce facial redness and pigmentation while improving sleep and mood for healthy females with sensitive skin. This gentle botanical suits most skin types and is often available in [serums](https://lovi.care/skincare/nl/ingredients/serum). It fits easily into a daily routine, working well alongside [glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid), [aha blend glycolic and citric acids](https://lovi.care/skincare/nl/ingredients/aha-blend-glycolic-and-citric-acids), and [bio-placenta peptides](https://lovi.care/skincare/nl/ingredients/bio-placenta-peptides). [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) This page shows theanine products with a Lovi page. For every product, and a routine built for your skin, use the Lovi app. ### Popular theanine products - [Shiseido Treatment Softener](https://lovi.care/skincare/nl/p/shiseido/treatment-softener/for/oily-skin) — High fit ## All theanine products - Shiseido · Hydrating Toner: [Treatment Softener](https://lovi.care/skincare/nl/p/shiseido/treatment-softener/for/oily-skin) - Clé de Peau Beauté · Hydrating Toner: [Hydro-Clarifying Lotion](https://lovi.care/skincare/nl/p/cle-de-peau-beaute/hydro-clarifying-lotion/for/sensitive-skin) ## What to combine theanine with Ingredient Together How to use them [Glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid) Works well Use them together, applying [glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid) first and then theanine, because they help keep skin hydrated and balanced. [Theanine and glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid-and-theanine) [AHA blend glycolic and citric acids](https://lovi.care/skincare/nl/ingredients/aha-blend-glycolic-and-citric-acids) Works well Use them together in the same routine, applying the exfoliating acid first and the amino acid product second to keep skin comfortable. [Theanine and aha blend glycolic and citric acids](https://lovi.care/skincare/nl/ingredients/aha-blend-glycolic-and-citric-acids-and-theanine) [Bio-placenta peptides](https://lovi.care/skincare/nl/ingredients/bio-placenta-peptides) Works well Use them together in the same routine, applying the peptides first to help your skin absorb the amino acid. [Theanine and bio-placenta peptides](https://lovi.care/skincare/nl/ingredients/bio-placenta-peptides-and-theanine) [Hexapeptide](https://lovi.care/skincare/nl/ingredients/hexapeptide) Works well Use them together in the same routine, because they help each other keep your skin hydrated and firm. [Theanine and hexapeptide](https://lovi.care/skincare/nl/ingredients/hexapeptide-and-theanine) [Lactic acid](https://lovi.care/skincare/nl/ingredients/lactic-acid) Works well Use them together in the same routine, applying the exfoliating acid first and the amino acid right after to keep skin calm. [Theanine and lactic acid](https://lovi.care/skincare/nl/ingredients/lactic-acid-and-theanine) [Acetyl hexapeptide-3](https://lovi.care/skincare/nl/ingredients/acetyl-hexapeptide-3) Works well Use [acetyl hexapeptide-3](https://lovi.care/skincare/nl/ingredients/acetyl-hexapeptide-3) and theanine together in the same routine, applying them at the same time to help your skin stay hydrated and firm. [Theanine and acetyl hexapeptide-3](https://lovi.care/skincare/nl/ingredients/acetyl-hexapeptide-3-and-theanine) [Mandelic acid](https://lovi.care/skincare/nl/ingredients/mandelic-acid) Works well Use them together in the same routine, applying the [mandelic acid](https://lovi.care/skincare/nl/ingredients/mandelic-acid) first and the theanine after, because they balance moisture levels. [Theanine and mandelic acid](https://lovi.care/skincare/nl/ingredients/mandelic-acid-and-theanine) [Hyaluronic acid](https://lovi.care/skincare/nl/ingredients/hyaluronic-acid) Works well Use them together in the same routine, applying the [hyaluronic acid](https://lovi.care/skincare/nl/ingredients/hyaluronic-acid) first and the theanine after, because they help each other keep the skin hydrated. [Theanine and hyaluronic acid](https://lovi.care/skincare/nl/ingredients/hyaluronic-acid-and-theanine) [Collagen peptide](https://lovi.care/skincare/nl/ingredients/collagen-peptide) Works well Use them together in the same routine, applying theanine first and [collagen peptide](https://lovi.care/skincare/nl/ingredients/collagen-peptide) right after. [Theanine and collagen peptide](https://lovi.care/skincare/nl/ingredients/collagen-peptide-and-theanine) [Copper peptide](https://lovi.care/skincare/nl/ingredients/copper-peptide) Works well Use them together in the same routine, because the amino acid helps the [copper peptide](https://lovi.care/skincare/nl/ingredients/copper-peptide) work better for your skin. [Theanine and copper peptide](https://lovi.care/skincare/nl/ingredients/copper-peptide-and-theanine) [Citric acid](https://lovi.care/skincare/nl/ingredients/citric-acid) Works well Use them together in the same routine, applying the [citric acid](https://lovi.care/skincare/nl/ingredients/citric-acid) first and the theanine after, for a gentle and balanced glow. [Theanine and citric acid](https://lovi.care/skincare/nl/ingredients/citric-acid-and-theanine) [Hexapeptide-9](https://lovi.care/skincare/nl/ingredients/hexapeptide-9) Works well Use [hexapeptide-9](https://lovi.care/skincare/nl/ingredients/hexapeptide-9) and theanine together, applying them both in your morning hydrating routine to support skin firmness and moisture balance. [Theanine and hexapeptide-9](https://lovi.care/skincare/nl/ingredients/hexapeptide-9-and-theanine) [Peptide-rich plasma](https://lovi.care/skincare/nl/ingredients/peptide-rich-plasma) Works well Use them together in the same routine, applying theanine first and [peptide-rich plasma](https://lovi.care/skincare/nl/ingredients/peptide-rich-plasma) right after to boost hydration. [Theanine and peptide-rich plasma](https://lovi.care/skincare/nl/ingredients/peptide-rich-plasma-and-theanine) [Triple peptide blend](https://lovi.care/skincare/nl/ingredients/triple-peptide-blend) Works well Use them together in the same routine, applying the peptide blend first and the amino acid product right after. [Theanine and triple peptide blend](https://lovi.care/skincare/nl/ingredients/triple-peptide-blend-and-theanine) [Palmitoyl pentapeptide-4](https://lovi.care/skincare/nl/ingredients/palmitoyl-pentapeptide-4) Works well Use them together in the same routine, because they help each other build firmness and add moisture. [Theanine and palmitoyl pentapeptide-4](https://lovi.care/skincare/nl/ingredients/palmitoyl-pentapeptide-4-and-theanine) [Palmitoyl tripeptide-1](https://lovi.care/skincare/nl/ingredients/palmitoyl-tripeptide-1) Works well Use them together in the same routine, applying the peptide product first followed by the amino acid product for best hydration and repair. [Theanine and palmitoyl tripeptide-1](https://lovi.care/skincare/nl/ingredients/palmitoyl-tripeptide-1-and-theanine) From the ingredient rules behind the "Works well with" and "Don't mix with" notes on every product in the Lovi app. ## Questions and answers ### What does theanine do for the skin? Theanine helps reduce facial redness and pigmentation, particularly for sensitive skin. Topical use supports a calmer complexion. [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) ### How do you use theanine? You can use theanine topically to help reduce facial redness and improve skin hydration. When combining it with exfoliating acids or peptides, apply the other product first and theanine right after to keep skin calm and balanced. [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) ### Should you use theanine in the morning or at night? You can use theanine in your morning hydrating routine when combining it with [hexapeptide-9](https://lovi.care/skincare/nl/ingredients/hexapeptide-9) to support skin firmness and moisture balance. ### Can you use theanine every day? Yes, you can use theanine every day, as topical botanical products containing theanine help reduce facial redness and pigmentation while supporting sensitive skin. [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) ### Does theanine cause purging or irritation? Theanine is unlikely to cause purging or irritation because it is a soothing amino acid that helps keep sensitive skin calm and comfortable. [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) ### Which skin types is theanine best for? Theanine helps sensitive skin by reducing facial redness and pigmentation. [Journal of Clinical Medicine, 2022](https://pubmed.ncbi.nlm.nih.gov/36431167/) ### Can you use theanine with glycolic acid? Yes, you can use theanine with [glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid) together in your routine by applying glycolic acid first and then theanine, because they help keep skin hydrated and balanced. ## Research on theanine - [Combining Topical and Oral Botanicals for Skin Redness, Pigmentation, Sleep, and Mood: A Randomized Controlled Study](https://pubmed.ncbi.nlm.nih.gov/36431167/) Theanine · Journal of Clinical Medicine, 2022 ## Combining theanine - Work well together: [Acetyl hexapeptide-3 and theanine](https://lovi.care/skincare/nl/ingredients/acetyl-hexapeptide-3-and-theanine) - Work well together: [Bio-placenta peptides and theanine](https://lovi.care/skincare/nl/ingredients/bio-placenta-peptides-and-theanine) - Work well together: [Collagen peptide and theanine](https://lovi.care/skincare/nl/ingredients/collagen-peptide-and-theanine) - Work well together: [Copper peptide and theanine](https://lovi.care/skincare/nl/ingredients/copper-peptide-and-theanine) - Work well together: [Hexapeptide and theanine](https://lovi.care/skincare/nl/ingredients/hexapeptide-and-theanine) - Work well together: [Hexapeptide-9 and theanine](https://lovi.care/skincare/nl/ingredients/hexapeptide-9-and-theanine) - Work well together: [Palmitoyl pentapeptide-4 and theanine](https://lovi.care/skincare/nl/ingredients/palmitoyl-pentapeptide-4-and-theanine) - Work well together: [Palmitoyl tripeptide-1 and theanine](https://lovi.care/skincare/nl/ingredients/palmitoyl-tripeptide-1-and-theanine) - Work well together: [Peptide-rich plasma and theanine](https://lovi.care/skincare/nl/ingredients/peptide-rich-plasma-and-theanine) - Work well together: [Triple peptide blend and theanine](https://lovi.care/skincare/nl/ingredients/triple-peptide-blend-and-theanine) - Work well together: [AHA blend glycolic and citric acids and theanine](https://lovi.care/skincare/nl/ingredients/aha-blend-glycolic-and-citric-acids-and-theanine) - Work well together: [Citric acid and theanine](https://lovi.care/skincare/nl/ingredients/citric-acid-and-theanine) - Work well together: [Glycolic acid and theanine](https://lovi.care/skincare/nl/ingredients/glycolic-acid-and-theanine) - Work well together: [Lactic acid and theanine](https://lovi.care/skincare/nl/ingredients/lactic-acid-and-theanine) - Work well together: [Mandelic acid and theanine](https://lovi.care/skincare/nl/ingredients/mandelic-acid-and-theanine) - Work well together: [Hyaluronic acid and theanine](https://lovi.care/skincare/nl/ingredients/hyaluronic-acid-and-theanine) ## Brands with theanine - Japanese skincare: [Shiseido](https://lovi.care/skincare/nl/brands/shiseido) - Japanese skincare: [Clé de Peau Beauté](https://lovi.care/skincare/nl/brands/cle-de-peau-beaute) ## Related ingredients - [Glycolic acid](https://lovi.care/skincare/nl/ingredients/glycolic-acid) - [AHA blend glycolic and citric acids](https://lovi.care/skincare/nl/ingredients/aha-blend-glycolic-and-citric-acids) - [Bio-placenta peptides](https://lovi.care/skincare/nl/ingredients/bio-placenta-peptides) - [Hexapeptide](https://lovi.care/skincare/nl/ingredients/hexapeptide) - [Lactic acid](https://lovi.care/skincare/nl/ingredients/lactic-acid) - [Acetyl hexapeptide-3](https://lovi.care/skincare/nl/ingredients/acetyl-hexapeptide-3) - [Mandelic acid](https://lovi.care/skincare/nl/ingredients/mandelic-acid) - [Hyaluronic acid](https://lovi.care/skincare/nl/ingredients/hyaluronic-acid) - [Collagen peptide](https://lovi.care/skincare/nl/ingredients/collagen-peptide) - [Copper peptide](https://lovi.care/skincare/nl/ingredients/copper-peptide) - [Citric acid](https://lovi.care/skincare/nl/ingredients/citric-acid) - [Hexapeptide-9](https://lovi.care/skincare/nl/ingredients/hexapeptide-9) - [Peptide-rich plasma](https://lovi.care/skincare/nl/ingredients/peptide-rich-plasma) - [Triple peptide blend](https://lovi.care/skincare/nl/ingredients/triple-peptide-blend) - [Palmitoyl pentapeptide-4](https://lovi.care/skincare/nl/ingredients/palmitoyl-pentapeptide-4) - [Palmitoyl tripeptide-1](https://lovi.care/skincare/nl/ingredients/palmitoyl-tripeptide-1) ## About the Lovi Fit Lovi: Unbiased, science-based skincare AI trained on real user outcomes. Lovi checks every ingredient with brand-independent rules its dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update. Levels from best to worst: Superior, High, Average, Low, Caution, Warning. Behind this ingredient guide: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board). Page built Nov 8, 2026. More from Lovi: https://lovi.care/skincare/llms.txt ## This page in other countries - United States: https://lovi.care/skincare/ingredients/theanine - United Kingdom: https://lovi.care/skincare/uk/ingredients/theanine - Ireland: https://lovi.care/skincare/ie/ingredients/theanine - Germany: https://lovi.care/skincare/de/ingredients/theanine - France: https://lovi.care/skincare/fr/ingredients/theanine - Italy: https://lovi.care/skincare/it/ingredients/theanine - Netherlands: https://lovi.care/skincare/nl/ingredients/theanine (this page) - Spain: https://lovi.care/skincare/es/ingredients/theanine - Canada: https://lovi.care/skincare/ca/ingredients/theanine - Australia: https://lovi.care/skincare/au/ingredients/theanine - Singapore: https://lovi.care/skincare/sg/ingredients/theanine - Saudi Arabia: https://lovi.care/skincare/sa/ingredients/theanine - United Arab Emirates: https://lovi.care/skincare/ae/ingredients/theanine