# Castor oil as a carrier for essential oils

> Castor oil is famously thick and sticky because it’s almost all ricinoleic acid. That heaviness makes it a staple of scalp, brow and cuticle care — usually thinned with a lighter carrier so it actually spreads.

Canonical page: https://essential-oils.club/carrier-oils/castor

## At a glance

- **Botanical name:** Ricinus communis
- **Made from:** Castor seeds
- **Extraction:** Cold-pressed
- **Texture:** Very thick
- **Absorption:** Very slow, sticky
- **Scent:** Faint
- **Shelf life:** About 1–2 years — quite stable
- **Make-up:** Ricinoleic acid ~85–90% — unusual among plant oils

## Best for

- Scalp & hair blends
- Brow care (away from eyes)
- Cuticles & nails
- Thinned 1:1 with a lighter oil

## How to use it

For a scalp blend, mix castor 1:1 with jojoba or FCO and add rosemary and cedarwood at about 1%.

Dilution help: https://essential-oils.club/tools/dilution-calculator · https://essential-oils.club/tools/dilution-chart

## Cautions

Keep castor-based essential-oil blends well away from the eyes. Its stickiness can be hard to wash out — use small amounts.

## Frequently asked questions

### Can you use castor oil as a carrier oil?

Yes, mainly for hair, scalp and cuticle blends — but it’s very thick, so most people thin it 1:1 with a lighter carrier.

### Castor oil with rosemary oil for hair?

A popular scalp combination: castor thinned with jojoba, plus rosemary at about 1%. Massage in, leave a while, then wash out.

_Educational reference only — not medical advice. Essential oils are not intended to diagnose, treat, cure or prevent any disease._