Boronophenylalanine HCl is a synthetic amino acid derivative with very limited cosmetic use; its role in skincare is not well-documented and it is not a standard ingredient in consumer products.
Irritation
moderate
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
Boronophenylalanine HCl is a synthetic amino acid derivative with very limited cosmetic use; its role in skincare is not well-documented and it is not a standard ingredient in consumer products.
Irritation
moderate
Source
synthetic
Boswellia Frereana Resin Oil offers a pleasant, woody scent and potential soothing benefits, but its fragrance components can be irritating for sensitive skin.
Irritation
moderate
Source
natural
A gentle, plant-based ingredient that helps calm redness and protect skin from environmental stress.
Irritation
low
Source
natural
A fragrant resin oil with potential soothing benefits, but limited research and a risk of skin irritation for sensitive individuals.
Irritation
moderate
Source
natural
Boswellia Papyrifera Resin Oil offers a natural, soothing fragrance with some antioxidant potential, but its essential oil nature means it can be irritating for sensitive skin.
Irritation
moderate
Source
natural
A gentle, water-based extract of frankincense resin that helps calm skin and provides antioxidant protection.
Irritation
low
Source
natural
A gentle, lab-grown plant cell extract that may help calm skin and defend against environmental stress, though human studies are limited.
Irritation
low
Source
biotech
A mild, water-based form of frankincense that may help calm redness and support a balanced complexion.
Irritation
low
Source
natural
Astringent
POTENTILLA ERECTA ROOT/(HAMAMELIS VIRGINIANA/ROSMARINUS OFFICINALIS/SALVIA OFFICINALIS) LEAF/THYMUS VULGARIS FLOWER/LEAF/STEM EXTRACT
A multi-herb botanical blend that can help tighten pores and calm skin, but its effectiveness depends heavily on the formulation.
Irritation
low
Source
natural
Antioxidant
Cinnamomum Cassia Bark/Poncirus Trifoliata Fruit/Saururus Chinensis Leaf/Root/Sophora Angustifolia Root Extract
A blend of four traditional botanical extracts that may offer antioxidant and soothing benefits, but human skin research is still limited.
Irritation
low
Source
natural
A catch-all for plant extracts that can offer antioxidant and soothing benefits, but the exact effects depend on the specific plants used.
Irritation
low
Source
natural
Antioxidant
EQUISETUM ARVENSE/GALIUM APARINE/VANILLA PLANIFOLIA FRUIT EXTRACT
A gentle botanical blend that may offer antioxidant and soothing benefits, but research is limited.
Irritation
low
Source
natural
A gentle fern extract with antioxidant potential, but research is still early and benefits are not yet proven in large human studies.
Irritation
low
Source
natural
A gentle fern extract with antioxidant potential, best for sensitive or environmentally stressed skin, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich ferment that may help protect skin from environmental stress, but research is still early.
Irritation
low
Source
biotech
A gentle, antioxidant-rich ferment that may help soothe and protect skin, but research is still early.
Irritation
low
Source
biotech
A gentle, plant-based oil that hydrates and softens skin without clogging pores, with emerging research on its antioxidant potential.
Irritation
low
Source
natural
A peptide that mimics the effects of botulinum toxin to soften expression lines, but with milder and temporary results.
Irritation
low
Source
synthetic
A synthetic peptide that may temporarily soften expression lines, but results are subtle compared to injectable treatments.
Irritation
low
Source
synthetic
Anti-wrinkle agent
SR-Clostridium Botulinum Polypeptide-1, Sh-Oligopeptide-1
A synthetic peptide blend that may temporarily soften expression lines, but results are subtle and not comparable to injectable treatments.
Irritation
low
Source
synthetic
A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant extract that may help calm skin and fight free radicals, though research is still early.
Irritation
low
Source
natural
A gentle, antioxidant-rich rose extract that helps soothe skin and fight free radical damage, but its benefits are best supported by general rose research rather than specific studies on this exact species.
Irritation
low
Source
natural
A bovine-derived peptide that may support collagen and skin repair, but evidence is limited and ethical sourcing is a concern.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research on its specific skin benefits is still limited.
Irritation
low
Source
natural
A synthetic film former that helps nail polish last longer, but its connection to bisphenol A raises safety questions for some users.
Irritation
low
Source
synthetic
A gentle botanical powder that may offer mild soothing and absorbent benefits, but research is very limited.
Irritation
low
Source
natural
A gentle, antioxidant-rich leaf extract that may help soothe and protect skin, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich flower extract that may help protect skin from environmental stress, though human studies are limited.
Irritation
low
Source
natural
Brain lipids are rich in fatty acids and phospholipids that can help moisturize and support the skin barrier, but sourcing and ethical concerns limit their use.
Irritation
low
Source
natural
A gentle, antioxidant-rich aquatic extract that may help calm irritated skin and defend against environmental stress, though human studies are still limited.
Irritation
low
Source
natural
A gentle, plant-based conditioning ingredient that helps detangle hair and soften skin without heavy buildup.
Irritation
low
Source
natural
A mild, plant-derived surfactant that effectively cleanses while respecting the skin barrier — ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses effectively while being gentle on sensitive and dry skin.
Irritation
low
Source
semi-synthetic
A gentle, antioxidant-rich extract that helps protect skin from environmental stress while providing light nourishment.
Irritation
low
Source
natural
A gentle, antioxidant-rich flower extract that may help protect skin from environmental stress, though research is still emerging.
Irritation
low
Source
natural
Brazil nut oil is a nourishing emollient rich in selenium and fatty acids, but its moderate comedogenic rating means it may not suit all skin types.
Irritation
low
Source
natural
A gentle, water-soluble emollient derived from Brazil nut oil, ideal for adding slip and softness without greasiness.
Irritation
low
Source
semi-synthetic
A mild, eco-friendly emulsifier that helps blend oil and water in formulas while adding a touch of skin-softening nourishment.
Irritation
low
Source
semi-synthetic
A gentle, antioxidant-rich extract from Brazil nut shells that may help protect skin from environmental stress, though research is still emerging.
Irritation
low
Source
natural
A natural, gentle exfoliating powder that helps smooth skin without harsh microbeads, but may be too gritty for sensitive skin if particles are large.
Irritation
low
Source
natural
A gentle, plant-based antioxidant that may help calm skin and fight free radical damage, though research is still emerging.
Irritation
low
Source
natural
A lightweight, antioxidant-rich oil that may help soothe and protect the skin, but research is still limited.
Irritation
low
Source
natural
A plant-based antioxidant extract that may help calm skin and fight free radical damage, though research is still early.
Irritation
low
Source
natural
A lightweight, antioxidant-rich oil that may help soothe and moisturize skin, but its comedogenic potential means it's best for normal to dry skin types.
Irritation
low
Source
natural
A gentle, antioxidant-rich oil that helps moisturize and protect the skin without clogging pores.
Irritation
low
Source
natural
A gentle, plant-based emollient that softens and smooths skin with a lightweight feel, though research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant that may help calm skin and protect against environmental stress, though research is still emerging.
Irritation
low
Source
natural
A novel plant protein with promising anti-aging potential, but research is still early and it's not widely available in consumer products.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant extract that may help protect skin from environmental stress, though research is still early.
Irritation
low
Source
natural
A marine-derived antioxidant extract with limited but promising research; best for soothing and protecting sensitive skin.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established.
Irritation
low
Source
natural
Brilliant Black 1 is a safe synthetic colorant for most people, but those with sensitive skin or allergies should patch test first.
Irritation
low
Source
synthetic
A gentle botanical extract with antioxidant and soothing potential, but research is still early and benefits are not yet proven in large human studies.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
Broccoli seed oil is a lightweight, non-greasy plant oil that mimics silicones, making hair soft and shiny while moisturizing skin without clogging pores.
Irritation
low
Source
natural
A lightweight, plant-derived emollient that mimics silicones and offers antioxidant benefits without clogging pores.
Irritation
low
Source
natural
A gentle, antioxidant-rich powder from broccoli sprouts that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle pineapple-derived enzyme that exfoliates and calms skin, but may irritate sensitive skin if overused.
Irritation
moderate
Source
natural
A plant extract with potential soothing and antioxidant benefits, but research is limited and it's not a proven powerhouse ingredient.
Irritation
low
Source
natural