Shea butter is a naturally occurring fat extracted by crushing and boiling the kernels of Vitellaria paradoxa, a tree indigenous to the savanna belt of West and Central Africa. It has been used for millennia by communities across Ghana, Mali, Burkina Faso, Nigeria, and Uganda as both a food source and a topical remedy for skin and hair. Unrefined (raw) shea butter retains the highest concentration of bioactive compounds, including triterpenes, phenolics, and tocopherols, which are partially lost during commercial refining.

Shea butter exerts its effects through several overlapping mechanisms. Its triterpene alcohol fraction — particularly lupeol and cinnamic acid esters — has demonstrated inhibition of inflammatory mediators including 5-lipoxygenase and COX enzymes, reducing pro-inflammatory prostaglandin and leukotriene synthesis in the skin. The high oleic and stearic acid content integrates into the stratum corneum lipid matrix, restoring transepidermal water loss (TEWL) and reinforcing the skin barrier. Tocopherols and phytosterols provide antioxidant protection and support keratinocyte membrane integrity.

Unrefined shea butter is yellowish to gray in color with a characteristic nutty odor and is the form with the highest bioactive content. Refined shea butter is white, odorless, and more cosmetically elegant but has a reduced unsaponifiable fraction. Commercial skin creams and lotions typically use refined shea. For clinical dermatological applications and research, standardized extracts of the unsaponifiable fraction are used. Oral formulations of shea unsaponifiables exist but are not yet widely commercialized.

• Dry skin / xerosis
• Atopic dermatitis (eczema)
• Psoriasis
• Stretch marks
• Wound healing and scar support
• Scalp health and hair moisture retention
• Mild UV protection support

• Transepidermal water loss (TEWL) — barrier occlusion demonstrated in clinical emollient studies
• Eczema flare frequency reduction with consistent emollient use — supported by RCT evidence in emollient therapy trials
• Minor UV-B skin damage — low-level natural SPF from cinnamic acid esters in unrefined shea

• Shea butter (as a food fat) — In West and Central Africa, shea butter is used as a cooking fat and food ingredient, providing dietary triterpenes, stearic acid, and oleic acid — the same bioactive lipids responsible for its topical effects. It is the only direct food source of shea-specific triterpene cinnamates.
• Cocoa butter — Shares a nearly identical fatty acid profile (high stearic and oleic acid) and also contains triterpene compounds, making it the closest dietary analog to shea butter's fatty acid and skin-barrier-relevant nutrient content.
• Avocado — High in oleic acid and tocopherols (Vitamin E), supporting the same skin barrier lipid pathways that shea butter's topical fatty acids address — oleic acid supports ceramide synthesis and membrane fluidity.
• Olive oil (extra virgin) — Rich in oleic acid and polyphenolic antioxidants including oleuropein and hydroxytyrosol, which support skin barrier integrity and reduce systemic inflammatory signaling relevant to inflammatory skin conditions.
• Sunflower seeds and sunflower oil (high-oleic varieties) — Provide linoleic acid and Vitamin E (alpha-tocopherol), nutrients that support ceramide production and antioxidant skin protection — directly paralleling two of shea butter's key bioactive contributions.

• Contact allergic dermatitis (rare; more common with unrefined grades containing higher protein content)
• Comedogenicity in acne-prone individuals — shea rates approximately 0–2 on the comedogenic scale, but heavy application on oily skin may contribute to clogged pores in sensitive individuals
• Mild folliculitis with excessive occlusive use on hair follicle-dense areas
• Theoretical nut-allergy cross-reactivity in highly sensitized individuals
• Greasy or heavy texture may cause temporary discomfort or clothing staining with excess application

• Recommended daily: Topical: Apply a pea-to-dime-sized amount (approximately 0.5–1g) to affected skin areas once or twice daily. For full-body use in dry skin conditions, 5–10g per application is typical. Warm between palms before applying to improve spreadability.
• Best time of day: Evening application is optimal for barrier repair (nighttime skin regeneration cycle); morning application supports daytime moisturization and UV-buffering. Post-bathing application while skin is slightly damp maximizes hydration lock-in.
• With or without food: Not applicable for topical use. If used as a dietary cooking fat, no specific meal-timing requirements apply.
• Time to effect: Immediate skin softening within minutes of application; meaningful barrier repair and anti-inflammatory effects with consistent use over 2–4 weeks; full clinical improvement in eczema or psoriasis typically assessed at 4–8 weeks.
• How long to take it: No cycling required for topical use; shea butter can be used continuously as a daily moisturizer indefinitely. For acute skin conditions (eczema flares, wound healing), consistent twice-daily application for a minimum of 4 weeks is recommended before evaluating efficacy.