FerroxLabs Skincare Guide
When to Use
Use this skill when:
- User asks about skincare guide
- User needs guidance on skincare guide topics
- User wants a structured approach to skincare guide
Do NOT use when:
- Request requires professional consultation beyond educational guidance
- User needs emergency assistance
Questions to Ask the User First
- What is your skin type? (Oily / Dry / Combination / Normal / Sensitive / Not sure)
- What are your main skin concerns? (Acne / Aging / Dark spots / Redness / Dullness / Dryness / Sensitivity / None specific)
- What is your current routine? (Nothing / Cleanser only / Basic routine / Multi-step routine)
- How old are you? (Age affects product recommendations)
- What is your gender? (Skin care needs can differ)
- What climate do you live in? (Humid / Dry / Temperate / Extreme)
- Do you have any known allergies or sensitivities? (Fragrance / Specific ingredients / None)
- What is your budget? (Drugstore / Mid-range / Premium / Luxury)
- How much time do you want to spend on skincare? (2 minutes / 5 minutes / 10+ minutes)
- Are you currently using any prescription skincare? (Tretinoin / Antibiotics / Other / None)
Phase 1: Skin Type Assessment
How to Determine Your Skin Type
THE BARE-FACE TEST:
1. Wash your face with a gentle cleanser
2. Pat dry and do NOT apply any products
3. Wait 30-60 minutes
4. Observe your skin
RESULTS:
OILY:
- Entire face feels slick or shiny
- Visible shine on forehead, nose, cheeks, and chin
- Pores appear larger
- Prone to blackheads and breakouts
- Makeup tends to slide off
DRY:
- Skin feels tight or uncomfortable
- May see flaking or rough patches
- Pores appear small
- Skin may look dull
- Fine lines more visible
- May feel itchy
COMBINATION:
- T-zone (forehead, nose, chin) is oily or shiny
- Cheeks are normal or dry
- Different areas have different needs
- Most common skin type
NORMAL:
- Skin feels comfortable
- No excessive oil or dryness
- Generally smooth and even
- Few breakouts
- Lucky you!
SENSITIVE:
- Reacts easily to products (stinging, burning, redness)
- Prone to redness or flushing
- May have rosacea or eczema
- Fragrance and certain actives cause irritation
- Can be sensitive AND oily, dry, or combination
Skin Type Product Matching
| Skin Type | Cleanser | Moisturizer | Sunscreen | Actives to Favor |
|---|---|---|---|---|
| Oily | Gel or foam | Lightweight gel | Matte or gel | Niacinamide, salicylic acid, retinol |
| Dry | Cream or milk | Rich cream | Moisturizing | Hyaluronic acid, ceramides, squalane |
| Combination | Gentle gel | Lotion (lightweight) | Lightweight | Niacinamide, hyaluronic acid |
| Normal | Any gentle | Medium-weight | Any preference | Most actives tolerated well |
| Sensitive | Fragrance-free, cream | Soothing, minimal | Mineral (zinc oxide) | Centella asiatica, aloe, ceramides |
Phase 2: Building Your Routine
The Essential 3-Step Routine (Non-Negotiable)
If you do nothing else, do these three steps:
1. CLEANSER (AM and PM)
- Removes dirt, oil, makeup, sunscreen, and pollution
- Prepares skin for other products
- Use lukewarm water (hot water strips skin)
- Massage gently for 30-60 seconds
- Pat dry (don't rub)
2. MOISTURIZER (AM and PM)
- Hydrates and protects skin barrier
- Even oily skin needs moisturizer (skip = more oil production)
- Apply to slightly damp skin for best absorption
- Wait 1-2 minutes before next step
3. SUNSCREEN (AM only, every day)
- THE most important anti-aging product
- Prevents dark spots, wrinkles, and skin cancer
- SPF 30 minimum, SPF 50 ideal
- Apply as last step of skincare, before makeup
- Reapply every 2 hours if outdoors
THAT'S IT. You can stop here and have great skin.
Everything beyond these three steps is optimization.
The Complete Routine (AM and PM)
MORNING ROUTINE (Order matters):
1. Cleanser (or just water if dry/sensitive skin)
2. Toner (optional - hydrating or exfoliating)
3. Serum - Vitamin C (antioxidant protection)
4. Eye cream (optional)
5. Moisturizer
6. Sunscreen (SPF 30-50+) -- LAST STEP before makeup
Wait 2-3 minutes before applying makeup
EVENING ROUTINE (Order matters):
1. First cleanse - Oil cleanser or micellar water (removes makeup/sunscreen)
2. Second cleanse - Water-based cleanser (removes remaining impurities)
3. Exfoliant (2-3x per week, not daily)
Chemical: AHA (glycolic, lactic) or BHA (salicylic acid)
4. Toner (optional - hydrating)
5. Serum - Treatment serum (retinol, niacinamide, etc.)
6. Eye cream (optional)
7. Moisturizer (can use a richer one than morning)
8. Face oil (optional - last step to seal everything in)
PRODUCT LAYERING RULE:
Thinnest to thickest consistency.
Water-based before oil-based.
Treatments before moisturizers.
Product Layering Order Visual
MORNING (lightest to heaviest):
Water/Cleanser → Toner → Essence → Serum → Eye Cream → Moisturizer → Sunscreen
EVENING (lightest to heaviest):
Oil Cleanser → Water Cleanser → Exfoliant → Toner → Serum → Eye Cream → Moisturizer → Face Oil
RULE: If a product is watery, it goes before creamy.
Phase 3: Ingredient Guide
Key Active Ingredients
RETINOL / RETINOIDS (Vitamin A):
What it does: Increases cell turnover, boosts collagen, reduces wrinkles,
Who it's for: Anti-aging, acne, uneven skin tone (age 25+)
How to use: PM only, start 2x/week, build to nightly
Start with: 0.025-0.05% retinol; work up to 0.5-1%
Cautions: Start slow (irritation, peeling is common at first)
Don't combine with: AHA/BHA on same night (irritation)
Forms (weakest to strongest):
Retinyl palmitate → Retinol → Retinaldehyde → Adapalene → Tretinoin (Rx)
VITAMIN C (L-Ascorbic Acid):
What it does: Antioxidant protection, brightens skin, fades dark spots,
Who it's for: Everyone (especially anti-aging, dullness, dark spots)
How to use: AM (under sunscreen), daily
Concentration: 10-20% L-ascorbic acid is most effective
Cautions: Unstable -- look for dark glass bottles, check for oxidation (turns brown)
Best paired with: Vitamin E and ferulic acid (stabilizes and enhances)
HYALURONIC ACID:
What it does: Hydrates by drawing water to the skin (holds 1000x its weight in water)
Who it's for: ALL skin types, especially dry and dehydrated
How to use: AM and/or PM, apply to DAMP skin
Cautions: In very dry/low humidity climates, can pull water FROM skin
Concentration: 1-2% is effective (more is not better)
NIACINAMIDE (Vitamin B3):
What it does: Reduces pore appearance, regulates oil, fades dark spots,
Who it's for: All skin types, especially oily, acne-prone, sensitive
How to use: AM and/or PM, very well tolerated
Concentration: 2-5% (higher concentrations may irritate)
Cautions: Very few -- one of the most universally tolerated actives
Best paired with: Hyaluronic acid, peptides
Can be used with: Retinol (helpful for reducing irritation)
SALICYLIC ACID (BHA):
What it does: Oil-soluble exfoliant, penetrates into pores, clears blackheads,
Who it's for: Oily and acne-prone skin
How to use: 2-3x per week (daily if tolerated), AM or PM
Concentration: 0.5-2%
Cautions: Can be drying, always moisturize after
GLYCOLIC ACID (AHA):
What it does: Water-soluble exfoliant, removes dead skin cells,
Who it's for: Dull skin, texture issues, fine lines, dark spots
How to use: PM, 2-3x per week, build tolerance
Concentration: 5-10% for home use (20%+ for professional peels)
Cautions: Increases sun sensitivity (always use sunscreen)
CERAMIDES:
What it does: Restores and strengthens skin barrier, retains moisture
Who it's for: Dry, sensitive, compromised skin barrier
How to use: AM and PM in moisturizer
Cautions: None -- beneficial for everyone
SQUALANE:
What it does: Lightweight oil that mimics skin's natural sebum,
Who it's for: All skin types, especially dry and sensitive
How to use: Last step PM (or mixed into moisturizer)
Cautions: None significant
PEPTIDES:
What it does: Signal skin to produce more collagen, reduce wrinkles
Who it's for: Anti-aging (30+)
How to use: AM and/or PM
Cautions: Don't mix directly with strong acids (can deactivate)
Ingredient Compatibility Chart
SAFE TO COMBINE: | AVOID COMBINING (same routine):
Niacinamide + Hyaluronic Acid | Retinol + AHA/BHA
Vitamin C + SPF | Vitamin C + AHA/BHA (irritation)
Retinol + Niacinamide | Retinol + Benzoyl Peroxide
Retinol + Hyaluronic Acid | AHA + BHA together (too much exfoliation)
Ceramides + Everything | Multiple exfoliants at once
Peptides + Hyaluronic Acid |
SOLUTION: Alternate nights
Monday: Retinol night
Tuesday: AHA/BHA night
Wednesday: Retinol night
Thursday: AHA/BHA night
Friday: Retinol night
Saturday: Rest night (hydrating products only)
Sunday: Rest night
Phase 4: SPF -- The Most Important Step
Why Sunscreen is Non-Negotiable
THE FACTS:
- Up to 90% of visible skin aging is caused by UV exposure
- UV damage occurs even on cloudy days (up to 80% of UV penetrates clouds)
- UV rays penetrate windows (UVA passes through glass)
- Skin cancer is the most common cancer in the US
- Daily SPF use reduces melanoma risk by 50%
- It's easier (and cheaper) to prevent damage than to fix it
SPF TYPES:
CHEMICAL (Organic):
- Absorbs UV rays and converts to heat
- Ingredients: avobenzone, octinoxate, oxybenzone, homosalate
- Pros: Lightweight, invisible, cosmetically elegant
- Cons: Can irritate sensitive skin, some concerns about certain ingredients
- Apply 15-20 minutes before sun exposure
MINERAL (Inorganic):
- Sits on top of skin, reflects/scatters UV rays
- Ingredients: zinc oxide, titanium dioxide
- Pros: Immediate protection, less irritating, reef-safer
- Cons: Can leave white cast (especially on darker skin tones), can feel heavy
- Modern formulations have reduced these issues significantly
HYBRID:
- Combination of chemical and mineral filters
- Best of both worlds for many people
SPF GUIDE:
SPF 15: Blocks 93% of UVB
SPF 30: Blocks 97% of UVB (minimum recommended)
SPF 50: Blocks 98% of UVB (recommended daily driver)
SPF 100: Blocks 99% of UVB (marginal benefit over SPF 50)
APPLICATION RULES:
- Amount: 1/4 teaspoon for face (about two finger lengths)
- Apply as LAST step of skincare
- Wait 2-3 minutes before makeup
- Reapply every 2 hours if outdoors
- Reapply after swimming, sweating, or toweling off
- Yes, you need sunscreen even if you have dark skin (reduces hyperpigmentation)
- Yes, you need sunscreen in winter
- Yes, you need sunscreen indoors near windows
Phase 5: Routines by Concern
Acne-Prone Skin Routine
MORNING:
1. Gentle gel cleanser (salicylic acid 0.5-2% or benzoyl peroxide 2.5%)
2. Niacinamide serum (2-5%) - reduces oil and redness
3. Oil-free/gel moisturizer
4. SPF 30-50 (matte or gel formula)
EVENING:
1. Oil cleanser (yes, even for oily skin - dissolves sebum)
2. Gentle gel cleanser
3. Alternate nights:
Night A: Benzoyl peroxide (2.5-5%) spot treatment OR retinol
Night B: Salicylic acid (BHA) exfoliant
4. Niacinamide serum
5. Lightweight moisturizer
ACNE DO's:
- Keep it simple (don't throw everything at acne at once)
- Be consistent (give products 6-8 weeks before judging)
- Change pillowcases 2x per week
- Clean phone screen regularly
- Don't pick or pop (leads to scarring and spreading)
- Hydrate (yes, oily acne-prone skin still needs moisture)
ACNE DON'Ts:
- Don't over-wash (2x daily max)
- Don't use harsh scrubs (micro-tears spread bacteria)
- Don't layer multiple acne treatments (over-drying worsens acne)
- Don't skip moisturizer (dehydrated skin produces MORE oil)
- Don't skip SPF (acne treatments increase sun sensitivity)
- Don't expect overnight results
WHEN TO SEE A DERMATOLOGIST:
- OTC products haven't helped after 8-12 weeks
- Cystic acne (deep, painful, under-skin bumps)
- Acne scarring is developing
- Acne is affecting your mental health
Anti-Aging Routine
MORNING:
1. Gentle cleanser
2. Vitamin C serum (10-20%)
3. Hyaluronic acid (on damp skin)
4. Eye cream with peptides
5. Moisturizer with ceramides
6. SPF 50 (broad-spectrum, daily)
EVENING:
1. Oil cleanser (to remove SPF thoroughly)
2. Gentle cleanser
3. Retinol / retinoid (start low, increase gradually)
4. Hyaluronic acid
5. Eye cream
6. Rich moisturizer (cream)
7. Face oil (squalane or rosehip) to seal
AGE-SPECIFIC FOCUS:
20s: Prevention
- Sunscreen daily (the single best anti-aging step)
- Antioxidant serum (vitamin C)
- Basic routine consistency
- Start retinol at 25 (low concentration, 2x/week)
30s: Early Intervention
- Continue everything from 20s
- Increase retinol strength gradually
- Add peptide-based eye cream
- Consider professional treatments (chemical peels)
- Focus on hydration
40s: Active Treatment
- Stronger retinoid (consider prescription tretinoin)
- Vitamin C daily (non-negotiable)
- Rich moisturizers with ceramides
- Consider adding growth factors or peptides
- Professional treatments: microneedling, laser
50s+: Restoration
- Prescription retinoid if tolerated
- Rich, barrier-supporting moisturizers
- Peptides and growth factors
- Less exfoliation (skin thins with age)
- Focus on hydration and barrier health
- Professional guidance for treatment options
Sensitive Skin Routine
MORNING:
1. Rinse with lukewarm water (or very gentle cream cleanser)
2. Centella asiatica or aloe serum (soothing)
3. Moisturizer with ceramides (fragrance-free)
4. Mineral sunscreen (zinc oxide-based)
EVENING:
1. Gentle cream cleanser (fragrance-free)
2. Optional: Niacinamide serum (2%, start slowly)
3. Moisturizer with ceramides
4. Soothing balm on dry areas if needed
SENSITIVE SKIN RULES:
- Patch test EVERY new product (inside of wrist, 24-48 hours)
- Introduce ONE new product at a time (wait 2 weeks between new additions)
- Avoid: fragrance, essential oils, alcohol denat., harsh sulfates
- Look for: "fragrance-free" (not "unscented" - which can still contain fragrance)
- Fewer products = less risk of reaction
- Keep a skin diary (track products and reactions)
INGREDIENTS TO AVOID WITH SENSITIVE SKIN:
- Fragrance/parfum
- Essential oils (lavender, tea tree in high concentrations)
- Alcohol denat (drying)
- Sodium lauryl sulfate (SLS)
- Retinol (introduce very slowly if desired)
- High-concentration acids
INGREDIENTS SAFE FOR SENSITIVE SKIN:
- Ceramides
- Centella asiatica (cica)
- Aloe vera
- Colloidal oatmeal
- Squalane
- Niacinamide (low concentration, 2-3%)
- Hyaluronic acid
- Panthenol (vitamin B5)
Phase 6: Seasonal Adjustments
Adapting Your Routine to Seasons
SUMMER (Hot/Humid):
- Lighter moisturizer (gel or lotion instead of cream)
- Higher SPF, more frequent reapplication
- Gel cleanser to control oil
- May reduce heavy oils and occlusives
- Vitamin C serum is especially important (UV defense)
- Blotting papers for midday oil control
- Waterproof/water-resistant SPF if sweating
WINTER (Cold/Dry):
- Switch to cream cleanser (less stripping)
- Heavier moisturizer (cream with ceramides)
- Add face oil as final PM step (locks in moisture)
- Reduce exfoliation frequency (skin is already stressed)
- Humidifier in bedroom (counteracts indoor heating)
- SPF still necessary (UV reflects off snow)
- Lip balm with SPF
- Avoid very hot showers (strips natural oils)
SPRING (Transition):
- Gradually lighten products
- Re-introduce exfoliants after winter
- Check SPF supply and update
- Good time to start new actives (retinol, vitamin C)
FALL (Transition):
- Start adding richer products
- Repair summer sun damage (vitamin C, niacinamide)
- Good time to introduce retinol (less sun exposure ahead)
- Hydrating masks weekly
Phase 7: Routine Builder Template
Personalized Routine Planner
SKIN PROFILE:
Type: _______________
Concerns: _______________
Age: ___
Climate: _______________
Budget: _______________
MORNING ROUTINE:
Step | Product Type | Specific Product | Purpose | Frequency
-----|-------------|-----------------|---------|----------
1 | Cleanser | | | Daily
2 | Toner | | | Daily/Optional
3 | Serum | | | Daily
4 | Eye Cream | | | Daily/Optional
5 | Moisturizer | | | Daily
6 | Sunscreen | | | Daily
EVENING ROUTINE:
Step | Product Type | Specific Product | Purpose | Frequency
-----|-------------|-----------------|---------|----------
1 | Oil Cleanser | | | If wearing makeup/SPF
2 | Cleanser | | | Daily
3 | Exfoliant | | | 2-3x/week
4 | Toner | | | Daily/Optional
5 | Serum | | | Daily
6 | Eye Cream | | | Daily/Optional
7 | Moisturizer | | | Daily
8 | Face Oil | | | As needed
WEEKLY TREATMENTS:
Treatment | Product | Frequency | Day(s)
----------|---------|-----------|-------
Exfoliant | | |
Mask | | |
Spot treatment | | |
MONTHLY BUDGET: $___________
Output Format
When providing a skincare routine, present it as:
SKINCARE ROUTINE
Skin Type: [Type]
Primary Concerns: [List]
Budget Level: [Drugstore / Mid-range / Premium]
Climate: [Type]
MORNING ROUTINE ([X] minutes):
Step | Product Category | Key Ingredient | How to Apply
-----|-----------------|----------------|-------------
1 | | |
2 | | |
EVENING ROUTINE ([X] minutes):
Step | Product Category | Key Ingredient | How to Apply
-----|-----------------|----------------|-------------
1 | | |
2 | | |
WEEKLY SCHEDULE:
Mon | Tue | Wed | Thu | Fri | Sat | Sun
----|-----|-----|-----|-----|-----|----
| | | | | |
PRODUCT RECOMMENDATIONS:
Category | Budget Option | Mid-Range | Premium
---------|-------------|-----------|--------
| | |
INGREDIENT CHEAT SHEET:
Active | Purpose | When to Use | Frequency
-------|---------|-------------|----------
| | |
RESULTS TIMELINE:
Week 1-2: [What to expect]
Week 4-6: [What to expect]
Week 8-12: [What to expect]
WARNINGS:
- [Specific to recommended products]
- [When to see a dermatologist]
Example
Input: "Help me get started with skincare guide"
Output: A structured skincare guide plan tailored to the user's specific situation, following the process outlined above.
Edge Cases
- Incomplete information: Ask clarifying questions before proceeding. Do not assume details the user has not provided.
- Out of scope requests: Redirect to appropriate professional resources when the request exceeds educational guidance.
- Conflicting requirements: Present trade-offs clearly and let the user decide priorities.