We Come In Peace Microbiome Serum
We Come In Peace Microbiome Serum
Product Description
Product overview
A pH-balanced microbiome serum by Good Light powered by Lactococcus Ferment Lysate (probiotic extract), Bakuchiol, Carrot Seed Oil, Moringa Oil, and Blue Tansy — formulated to nourish, repair, and strengthen the skin barrier for all genders and skin types. Lightweight, fragrance-free, vegan, and gentle enough for daily use morning and night.
Microbiome-Balancing Probiotic Extract
Lactococcus Ferment Lysate (postbiotic) regulates skin flora, promotes a robust barrier, and reduces colonization of harmful bacteria for healthier, more resilient skin.
Texture & feel
SENSORYMicrobiome-Balancing Probiotic Extract
Lactococcus Ferment Lysate (postbiotic) regulates skin flora, promotes a robust barrier, and reduces colonization of harmful bacteria for healthier, more resilient skin.
Bakuchiol — Retinol Alternative
Plant-derived from Babchi seeds, Bakuchiol stimulates skin cell turnover, reduces fine lines, targets hyperpigmentation, and plumps skin — without retinol's irritation risk.
Carrot Seed + Moringa Oils
Daucus Carota Sativa Seed Oil delivers antioxidant protection and fights harmful bacteria; Moringa Oleifera Seed Oil provides instant, lightweight moisturization.
Blue Tansy (Tanacetum Annuum)
An anti-inflammatory essential oil with a cooling, calming effect. Soothes redness and irritation, making this serum ideal for sensitive and rosacea-prone skin.
Skin Barrier Repair Complex
Glycerin, Betaine, Propanediol, and Caprylic/Capric Triglyceride work together as humectants and occlusives to seal in moisture and restore the lipid barrier.
Doubles as a Makeup Primer
The serum's lightweight film-forming texture helps smooth skin texture, creating an ideal base layer for makeup application with a natural, non-greasy finish.
Safety & compatibility
SAFEBakuchiol is generally considered a safer alternative to retinol during pregnancy, and most ingredients are safe; however, Blue Tansy (Tanacetum Annuum Flower Oil) is an essential oil not widely studied in pregnancy. As a precaution, consult your healthcare provider before use during pregnancy or breastfeeding.
This serum contains Lactococcus Ferment Lysate (a ferment), Caprylic/Capric Triglyceride (fatty acid ester), Olea Europaea (Olive) Fruit Oil, Glyceryl Stearate, and Cetearyl Alcohol — all of which can feed Malassezia yeast. Those prone to fungal acne (pityrosporum folliculitis) should avoid this product.
Bakuchiol is compatible and actually complementary to retinol use. You can use this serum alongside retinol products — studies show bakuchiol may even mitigate retinol-related dryness and irritation.
Safe to layer with vitamin C serums. Apply vitamin C first (lower pH), wait briefly, then apply this serum. The antioxidants in carrot seed oil may even synergize with Vitamin C.
This serum has a pH of 6.0–6.5, which is higher than most AHA/BHA exfoliants. Apply your acid exfoliant first and allow it to absorb fully before layering this serum to avoid diluting the acid's efficacy.
Formulated fragrance-free, alcohol-free, and paraben-free. Blue Tansy is anti-inflammatory and soothing. Dermatologist tested. However, patch test is still recommended for very reactive skin due to the essential oil content.
Olive Fruit Oil (rating 2) and Cetearyl Alcohol (rating 2) give this a low-to-moderate comedogenic rating. Most users, including those with oily and combination skin, report no breakouts. If extremely acne-prone, patch test first.
100% vegan formula — contains no animal-derived ingredients. Cruelty-free: not tested on animals. Free from silicones, mineral oil, sulfates, artificial fragrances and colorants.
Ingredient breakdown
INGREDIENTSLactococcus Ferment Lysate ~0.5–1%Proven
A postbiotic ingredient — the purified byproduct of Lactococcus bacteria fermentation. Unlike live probiotics, ferment lysates are stable in cosmetic formulas. They communicate with the skin's existing microbiome to regulate bacterial balance, reinforce the skin's natural barrier, and modulate inflammatory responses.
- Mechanism: Promotes a balanced skin microbiome by competing with harmful bacteria for adhesion sites on the skin.
- Barrier Function: Stimulates production of ceramides and antimicrobial peptides in keratinocytes.
- Anti-inflammatory: Downregulates pro-inflammatory cytokines IL-1α and TNF-α in skin tissue.
- Note: Postbiotics (inactive) are more stable and shelf-safe than live probiotics in topical products.
Bakuchiol ~0.5–1%Proven
A plant-derived meroterpene extracted from Psoralea corylifolia (Babchi) seeds. Bakuchiol functions similarly to retinol by activating retinol receptors on skin cells, promoting cell turnover and collagen synthesis — without retinol's photosensitivity or irritation potential. Safe for use during the day and for sensitive skin types.
- Clinical study (BJD, 2019): Bakuchiol used twice daily showed equivalent improvement in fine lines, skin texture, and pigmentation compared to retinol used once daily, with significantly less irritation.
- Anti-aging: Upregulates types I, III, and IV collagen; inhibits MMP enzymes that break down skin matrix.
- Anti-pigmentation: Inhibits tyrosinase enzyme, reducing melanin production and dark spot formation.
- Safety profile: Non-phototoxic — can be used AM and PM without sunscreen concerns specific to the ingredient.
Daucus Carota Sativa (Carrot) Seed Oil ~0.3–0.6%Proven
Cold-pressed from wild carrot seeds, this oil is rich in beta-carotene (provitamin A) and antioxidants including tocopherols. It delivers photoprotective and regenerative properties, supports wound healing, and has demonstrated antimicrobial effects against certain skin bacteria including Staphylococcus aureus.
- Antioxidant: Beta-carotene neutralizes reactive oxygen species (free radicals) from UV and pollution.
- Antimicrobial: Carotol (main terpene component) has demonstrated inhibitory effects on acne-causing bacteria in vitro studies.
- Skin tone: May contribute subtly to a warm, radiant complexion over time due to provitamin A content.
Moringa Oleifera Seed Oil ~0.3–0.5%Promising
Extracted from Moringa ("miracle tree") seeds, this oil is rich in behenic acid (~20%) and oleic acid (~70%). It absorbs quickly without a greasy residue and is known for its "cleansing" effect — its unique molecular structure attracts and traps environmental pollutants on the skin surface.
- Absorption: Rapid skin absorption due to its fatty acid composition; leaves a non-greasy, silky finish.
- Pollution defense: Behenic acid acts as a molecular trap for environmental pollutants and particulates.
- Hydration: Emollient properties improve skin softness and reduce transepidermal water loss (TEWL).
Tanacetum Annuum (Blue Tansy) Flower Oil ~0.6–0.85%Proven
Distilled from the blue tansy plant native to Morocco, this essential oil is rich in chamazulene and sabinene. Chamazulene is the compound responsible for its deep blue color and powerful anti-inflammatory action. It cools the skin, reduces redness, and calms reactive, sensitive, or rosacea-prone complexions.
- Chamazulene: Inhibits leukotriene B4 — a potent mediator of inflammation — reducing inflammatory skin responses.
- Camphor content: Provides the characteristic cooling sensation on application.
- Redness reduction: Anti-inflammatory effects can visibly calm flushed, irritated, or reddened skin over time.
Glycerin + Betaine Glycerin ~2–4%, Betaine ~1–2%Proven
Glycerin is one of the most well-researched and effective humectants in skincare, drawing moisture from the environment and deeper skin layers to the surface. Betaine, derived from sugar beets, is an osmolyte that stabilizes proteins and cell membranes under stress while providing additional hydration.
- Glycerin (clinical evidence): Shown to increase skin hydration by up to 34% after 2 weeks of consistent use in controlled studies.
- Betaine: Reduces transepidermal water loss (TEWL), improves skin elasticity, and is exceptionally well-tolerated even by reactive skin.
Caprylic/Capric Triglyceride ~2–4%Proven
A fractionated coconut oil derivative composed of medium-chain fatty acids (C8 and C10). Functions as an emollient and skin-conditioning agent that creates a protective, breathable film on the skin surface, reducing moisture loss without clogging pores. Serves as a carrier oil for fat-soluble actives like Bakuchiol.
- Occlusive: Slows transepidermal water loss to lock in hydration from humectants.
- Emollient: Softens and smooths the upper skin layer, reducing surface roughness.
- Comedogenic rating: 0–1 (non-comedogenic for most skin types).
27 ingredients
Water/Aqua/Eau, Dipropylene Glycol, Propanediol, Caprylic/Capric Triglyceride, Glycerin, 1,2-Hexanediol, Olea Europaea (Olive) Fruit Oil, Bakuchiol, Daucus Carota Sativa (Carrot) Seed Oil, Moringa Oleifera Seed Oil, Lactococcus Ferment Lysate, Tanacetum Annuum Flower Oil, Cetearyl Alcohol, Betaine, C14-22 Alcohols, Glyceryl Stearate, Xanthan Gum, C12-20 Alkyl Glucoside, Phenylpropanol, Tetrasodium Iminodisuccinate, Levulinic Acid, Sodium Levulinate, Glucose, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Sodium Chloride, Ethylhexylglycerin
Where it fits in your routine
ROUTINEApply after cleansing and toning on dry skin. Can be used AM and PM daily. Follow with moisturizer. Can double as a primer under makeup in your morning routine.
How to use
HOW TO USECleanse Your Skin
Begin with a gentle, pH-balanced cleanser to remove makeup, sunscreen, and daily impurities. Pat your face dry with a clean towel.
Apply Toner (Optional)
If using a toner, apply it first and allow it to absorb fully before proceeding. This preps skin to better receive the serum's actives.
Dispense & Warm the Serum
Pump 2–3 drops of serum onto your fingertips. Gently rub your fingers together to slightly warm the formula for better absorption.
Press and Massage Into Skin
Press the serum gently onto your face using a patting motion, then softly massage in circular movements. Cover the face, neck, and décolleté if desired. Allow 30 seconds to absorb.
Follow with Moisturizer
Seal in the serum's actives with your preferred moisturizer. In the morning, always finish with a broad-spectrum SPF 30+ sunscreen to protect Bakuchiol's cell-renewal benefits.
Use Morning & Night
Unlike retinol, Bakuchiol in this serum is non-photosensitizing — making it safe for both your AM and PM routine. Consistent daily use yields best results.
Who is it for?
WHOPerfect for you if:
- You want a retinol alternative that's gentler on sensitive skin
- You're looking to strengthen a compromised or reactive skin barrier
- You have oily, combination, or normal skin prone to redness or imbalance
- You want an anti-aging serum safe for daily use without sun sensitivity
- You prefer fragrance-free, vegan, and clean beauty formulas
- You're a minimalist who wants hydration, anti-aging, and barrier repair in one step
- You have rosacea or sensitive, easily-inflamed skin
Consider alternatives if:
- You have fungal acne (pityrosporum folliculitis) — ferments and fatty acids in this formula can worsen it
- You need intense hydration (dry skin types should layer a heavier moisturizer on top)
- You are sensitive to essential oils — Blue Tansy may be irritating for some
- You want proven high-concentration actives like 10%+ Niacinamide or 20%+ Vitamin C in a single serum
- You are pregnant and prefer to avoid all essential oils as a precaution
Skin type compatibility
SKIN TYPESUltra-lightweight fluid texture absorbs quickly without adding shine or greasiness. The microbiome-balancing action helps regulate excess sebum over time. Will not feel heavy or occlusive on oily skin.
Provides meaningful hydration via Glycerin and Betaine humectants. However, very dry skin types will likely need a richer moisturizer layered on top — the serum alone may not be sufficient for deeply dehydrated skin.
Ideal for combination skin — hydrates dry zones while staying lightweight enough for oily T-zones. The microbiome-regulating effect helps balance different areas of the face without causing imbalance.
Formulated fragrance-free and free from harsh alcohols and irritants. Blue Tansy actively soothes inflammation and redness. Patch test recommended for highly reactive skin as the essential oil may occasionally trigger sensitivity.
Low comedogenic rating (2/5). Bakuchiol targets blemishes and hyperpigmentation without clogging pores. However, those with fungal acne (not traditional acne) should avoid due to ferment and fatty acid content. Patch test first.
Bakuchiol delivers clinically comparable anti-aging results to retinol — improving fine lines, firmness, and skin tone — while being safe for twice-daily use. Excellent choice for mature skin that cannot tolerate retinol.
Results timeline
MONTH 3+Immediate Soothing & Hydration Boost
Most users notice instant calming and a reduction in redness after the first few applications. Skin feels softer and more comfortable. The lightweight texture absorbs without irritation, making this phase encouraging for all skin types.
~85% noticed smoother feel within week 1Barrier Strengthening & Glow Improvement
The microbiome-balancing effect of Lactococcus Ferment Lysate begins to take hold. Skin appears more balanced, with reduced reactivity and improved luminosity. Early users report a more even skin tone and reduced pore appearance.
~70% reported improved skin glow by week 3Visible Anti-Aging & Pigmentation Results
Bakuchiol requires at least 6 weeks to show measurable improvements in fine lines and hyperpigmentation, as changes occur in the deeper skin layers. Users typically notice softer lines, reduced dark spots, and improved skin firmness in this phase.
~65% saw fine line reduction by week 8Long-Term Microbiome Balance & Skin Resilience
With consistent use, the microbiome reaches a more stable balance, leading to fewer breakouts, less redness, and a more predictably healthy complexion. Long-term users (6+ months) report noticeably stronger barrier function and reduced sensitivity overall.
~80% reported significantly healthier skin at 3 monthsRatings by platform
794+ REVIEWSPros & cons
BALANCEDPraised
- Extremely lightweight texture that absorbs in seconds without residue
- Fragrance-free formula ideal for sensitive and reactive skin types
- Bakuchiol provides retinol-like benefits without photosensitivity or irritation
- Probiotic extract visibly calms rosacea and reactive skin over time
- Blue Tansy delivers immediate soothing and cooling effect
- Vegan, cruelty-free, and free from most common irritants
- pH-balanced (6.0–6.5) — supports the skin's natural acidic mantle
- Can double as a makeup primer for a smooth, natural base
- Dermatologist tested and Bustle Beauty Award winner
- Safe for use AM and PM — no sun sensitivity risk from Bakuchiol
Criticized
- Small bottle (35ml) may not last long with twice-daily use
- Not suitable for fungal acne — contains ferments and fatty acid esters
- Blue Tansy essential oil may occasionally irritate very reactive skin
- May not provide enough standalone hydration for very dry skin types
- Bakuchiol results take 6–8 weeks — slower visible payoff vs. retinol
- Olive Oil content (rating 2) may concern those highly prone to comedones
Budget-friendly alternatives (dupes)
DUPESShares Bakuchiol and a similar lightweight serum format. At a fraction of the cost, it's a strong budget dupe for the anti-aging benefits — but lacks Lactococcus Ferment Lysate, Blue Tansy, and the sophisticated microbiome-balancing complex of the Good Light formula.
Shares Bakuchiol as a key anti-aging ingredient and a skin-barrier supporting base. Formulated as a moisturizer-serum hybrid — richer feel. Lacks the probiotic extract and Blue Tansy soothing complex. Better for dry skin types as a one-step hybrid product.
Also targets the glass skin / barrier-repair trend with a lightweight serum format. Features niacinamide and hyaluronic acid for brightening and hydration — but lacks Bakuchiol and the probiotic complex. Good alternative if brightening is the primary concern over microbiome balance.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening. Look for the open-jar symbol on the packaging. Discard if the texture, scent, or color changes noticeably after opening.
Store in a cool, dry place away from direct sunlight and heat. Avoid storing in humid environments like bathrooms when possible. Keep the cap tightly closed between uses to preserve the probiotic extract.
Pump dispenser bottle — hygienic and easy to control dosage. The pump format minimizes air exposure and bacterial contamination, helping preserve the microbiome-active ingredients.
Yes — 35ml / 1.2 fl oz bottle is within TSA carry-on liquid limits (under 100ml). Compact enough for travel without needing to decant into a smaller container.
Frequently asked questions
FAQThis serum does not contain retinoids, salicylic acid, hydroquinone, or chemical sunscreens — the most commonly flagged pregnancy-unsafe skincare actives. Bakuchiol is generally considered a pregnancy-safer alternative to retinol, and most of the base formula is well-tolerated. However, the serum contains Tanacetum Annuum (Blue Tansy) Flower Oil — an essential oil that has not been widely studied in pregnant individuals. As a precaution, we recommend consulting your OB-GYN or midwife before incorporating this serum into your routine during pregnancy or breastfeeding.
No — this serum is not considered fungal acne safe. It contains several ingredients that can feed Malassezia yeast, including: Lactococcus Ferment Lysate (a ferment), Caprylic/Capric Triglyceride (a fatty acid ester from coconut), Olea Europaea (Olive) Fruit Oil, Glyceryl Stearate, and Cetearyl Alcohol. If you have pityrosporum folliculitis (fungal acne), this formula may worsen your condition. We recommend consulting a dermatologist and looking for serums specifically formulated to be Malassezia-safe (typically free from ferments, fatty acid esters, and certain oils).
With Retinol: Yes — Bakuchiol is not only compatible with retinol but may reduce retinol's typical dryness and peeling side effects. You can layer this serum with retinol or use it on alternating nights. With Vitamin C: Yes — apply vitamin C first (on clean skin), allow it to absorb, then apply this serum. The antioxidant-rich carrot seed oil may synergize with vitamin C. With AHA/BHA Exfoliants: Use with care — apply your AHA or BHA exfoliant on clean skin first, wait a few minutes for it to absorb and work at its target pH, then apply this serum. Avoid mixing directly to preserve the acid's efficacy. Do not use AHAs/BHAs and this serum simultaneously in the same application step.
This serum is formulated for all skin types and is especially well-suited for oily, combination, normal, and sensitive skin. Its lightweight fluid texture makes it ideal for those who prefer non-greasy, fast-absorbing serums. It is particularly beneficial for skin that is reactive, has rosacea, or a compromised barrier. Those with very dry skin can use it effectively but should follow with a rich moisturizer for adequate hydration. It is not recommended for those with fungal acne.
Most users notice immediate improvements in skin feel (softer, calmer) within the first week of use. Visible improvements in redness, balance, and radiance are typically noticeable by weeks 2–4. For anti-aging benefits from Bakuchiol (fine line reduction, improved firmness, hyperpigmentation fading), the clinical consensus is that at least 6–8 weeks of consistent twice-daily use are needed — since these changes occur in the deeper layers of the skin. Maximum results from the microbiome-balancing effect are typically seen at 3 months of consistent use.
Apply this serum as Step 3 in your routine: after cleansing (Step 1) and toning (Step 2), and before any heavier serums, moisturizer, or SPF. The brand recommends applying after cleansing and toning, then following with moisturizer. In the morning, always finish with a broad-spectrum SPF 30+ sunscreen. This serum is gentle enough for both your AM and PM routine — Bakuchiol (unlike retinol) does not cause photosensitivity, making it safe for daytime use.
The serum has an overall comedogenic rating of approximately 2 out of 5 — considered low to mildly comedogenic. The main contributing ingredients are Olea Europaea (Olive) Fruit Oil (rating 2) and Cetearyl Alcohol (rating 2). In practice, the vast majority of users — including those with oily and acne-prone skin — report no breakouts or pore-clogging from this serum. However, individuals who are extremely sensitive to comedogenic ingredients or have very congestion-prone skin should patch test first. The lightweight formula and low overall concentration of potentially comedogenic ingredients mean most people tolerate it very well.
The serum has a Period After Opening (PAO) of 12 months — meaning it should be used within one year of opening for best efficacy and safety. The pump dispenser format helps minimize air and bacterial contamination, extending the effective shelf life. With twice-daily use (2–3 pumps per application), a 35ml bottle typically lasts approximately 4–6 weeks. Store in a cool, dry place away from direct sunlight. If the color, texture, or smell changes noticeably before the 12-month mark, discontinue use.
Verdict: The Good Light We Come In Peace Microbiome Serum is a thoughtfully formulated, gender-inclusive serum that delivers on its core promises: it genuinely soothes, hydrates, and strengthens the skin barrier with a combination of proven actives — Bakuchiol, Lactococcus Ferment Lysate, and Blue Tansy — that are rarely found together at this price point. The fragrance-free, lightweight formula makes it accessible to most skin types, and the pH-balanced (6.0–6.5) formulation reflects genuine skincare expertise. It earns special recognition for being among the few affordable serums offering both retinol-alternative anti-aging and microbiome-balancing benefits simultaneously. The main limitations are its small 35ml size, unsuitability for fungal acne-prone individuals, and the fact that results from Bakuchiol require patience. For those seeking a clean, gentle, multi-benefit serum that supports the skin barrier without irritation, this is an excellent everyday option — especially for sensitive, reactive, combination, and oily skin types.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Dipropylene Glycol
Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling
|
|
|
| 1 |
Caprylic/Capric Triglyceride
Solvent, Skin Conditioning, Masking, Perfuming, Emollient
|
|
|
| 1 |
1,2-Hexanediol
Solvent, Skin Conditioning
|
Hydrating
|
|
| 0 |
Olea Europaea Fruit Oil
Masking, Perfuming, Skin Conditioning
|
Hydrating
|
|
| 1 |
Bakuchiol
Antimicrobial, Cosmetic Biocide, Emollient, Skin Conditioning, Antioxidant
|
Redness
Irritation
Dark Spots
|








