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Ingredient library
A plain-English guide to the butters, clays, oats, oils and botanicals used in Petal & Pestle routines. Built to help shoppers choose with more confidence and fewer assumptions.
Each ingredient needs a clear purpose, a sensible routine role and honest caution for reactive skin.
Ingredient explanations are written for cosmetic shopping clarity, not medical advice.
If your skin is flaring, broken or allergy-prone, patch test and check with a professional before trying something new.
Natural fragrance and essential oils can still trigger some people, so we call out caution where it matters.
Browse by role
Butters
A rich plant butter used for a softer, more comfortable skin feel.
Why it is used
Helps create a cushiony texture and supports moisture retention in creams and body care.
Best suited to
Watch out
Rich textures may feel heavy for some facial routines. Use a smaller amount first if your skin clogs easily.
Found in
Butters
A smooth, emollient butter used for slip and softness.
Why it is used
Adds a creamy finish to balms and body moisturisers without relying on synthetic fragrance.
Best suited to
Watch out
Patch test first if you are allergy-prone or currently reacting to new skincare.
Found in
Clays
A gentle-feeling clay used in weekly masks for a fresh, polished finish.
Why it is used
Gives a soft masking texture and helps absorb surface oil during a rinse-off routine.
Best suited to
Watch out
Do not let clay masks dry until tight and cracked. Avoid during active irritation or broken skin.
Found in
Clays
A mineral-rich clay used for a deeper-feeling cleanse in rinse-off masks.
Why it is used
Builds a clarifying mask texture for shoppers who want a more polished weekly routine.
Best suited to
Watch out
Can feel too intense for very reactive skin. Keep contact time short and moisturise afterwards.
Found in
Oats
Finely milled oats used for a soft, comforting mask texture.
Why it is used
Adds a gentle, creamy feel to rinse-off masks and helps keep the ritual low-fuss.
Best suited to
Watch out
Natural ingredients can still irritate some people. Avoid if you know oats are a trigger for you.
Found in
Oils
A botanical oil used for a richer, more conditioned skin or hair feel.
Why it is used
Supports slip, gloss and a nourished finish in oil-led routines.
Best suited to
Watch out
Oils are not one-size-fits-all. Patch test, especially if you are acne-prone or allergy-prone.
Found in
Oils
A lightweight-feeling oil often used for massage, softness and slip.
Why it is used
Helps products glide across skin or beard hair and leaves a conditioned finish.
Best suited to
Watch out
Avoid if you have a known nut allergy unless a qualified professional has advised it is suitable.
Found in
Oils
A familiar plant oil used for a smooth, conditioned finish.
Why it is used
Adds slip and a soft after-feel in hair care and some body routines.
Best suited to
Watch out
Some people find coconut oil heavy on facial skin. Use where the product directions recommend.
Found in
Botanicals
Plant-derived scent notes used sparingly for a more sensorial ritual.
Why it is used
Creates a natural scent profile and helps make repeat routines feel more enjoyable.
Best suited to
Watch out
Fragrance, including natural fragrance and essential oils, can be a trigger for some people.
Found in
Ingredient-first buying
If you are buying for yourself, start with the ingredient role and your routine need. If you are buying for someone else, choose a routine bundle so the products make sense together.