The buyer's guide · By Dr. Marisol
How to choose the best castor oil: a 5-point checklist
Five simple checks you can do on any bottle, and how to verify each one yourself.
Hi, I'm Marisol. "Which castor oil is the best?" is a question I hear almost every week.
When my team read through thousands of castor oil reviews, from many brands, two worries came up again and again. The oil smelled sour or "off". Or people were not sure it was really organic or cold-pressed.
The good news: you can check all of this yourself, in a few minutes. Here are the 5 checks I use, what each one means, and how to verify it. I have listed every source at the end.
At a glance
5 things to check on the bottle
- The USDA Organic sealand the name of the certifier.
- How it was made"Cold-pressed" and "hexane-free".
- One ingredientRicinus communis (castor) seed oil. Nothing else.
- Amber glassNot clear glass, not plastic.
- A batch numberand a brand that shares its lab results.
Start hereNot all castor oil is the same
Every castor oil comes from the same plant. What changes is how it is made and how it is kept.
Some oil is pressed from the seeds. Some is pulled out with a chemical solvent such as hexane[1]. Cold-pressed castor oil is usually lighter in color than solvent-extracted oil, and it scores better on a lab test for freshness called the acid value[1].
Then the oil goes into a bottle, and sits on a shelf for months. The bottle matters too. Let's go through the checks one by one.
Check 1USDA Certified Organic: look for the seal, not the word
The word "organic" is easy to print. The USDA Organic seal is not. In the US, a body care product can only use the seal if at least 95% of its ingredients are certified organic, and the label must name the certifier[2].
How USDA organic labels work
Seal or no seal?
The word "organic" is easy to print. The seal is not.
Source: USDA National Organic Program [2].
How to check it yourself: the USDA runs a free public database, called Organic INTEGRITY, where anyone can search certified organic operations[3]. Look up the brand or its maker. If it is not there, ask the brand for its organic certificate.
There is a bonus, too. US organic rules do not allow volatile synthetic solvents, like hexane, in organic handling[4]. So certified organic castor oil should also be hexane-free.
Check 2Cold-pressed and hexane-free
This one has its own guide, so here is the short version. Cold-pressed means the seeds are pressed slowly, without chemicals and without added heat. Hexane-free means no chemical solvent was used to pull out extra oil[1].
How castor oil is made
3 ways to get oil out of a seed
Cold-pressed
Seeds are pressed slowly. No chemicals, no added heat.
Below 122°F (50°C)
- SolventNone
- HeatKept low
- Oil per seedLess
Expeller-pressed
Seeds are pressed hard and fast. The pressure makes heat.
Often 140 to 210°F (60 to 99°C)
- SolventNone
- HeatFrom pressure
- Oil per seedMore
Solvent-extracted
Seeds or leftover seed cake are soaked in a solvent like hexane.
Heated after, to remove the solvent
- SolventHexane
- HeatTo remove solvent
- Oil per seedAlmost all
Source: Patel et al., 2016 [1].
Check 3One ingredient, nothing else
Turn the bottle over and read the ingredient list. In the US, cosmetic ingredients are listed by their common names, mostly from the largest amount to the smallest[5].
For pure castor oil, you should see one line: Ricinus communis (castor) seed oil. If you see other oils, it is a blend. If you see "fragrance" or "parfum", something was added.
You asked
Is a castor oil blend bad?
Not bad, just different. A blend can be thinner and easier to spread. But you are paying for castor oil, so you should know how much of it you are getting.
If a label just says "castor oil blend" with no amounts, I would keep looking.
Dr. Marisol
Check 4Amber glass, not clear glass or plastic
Light makes oils age faster. In one study, olive oil kept in clear glass on a sunny windowsill changed the most, amber glass helped, and oil kept fully in the dark did not change at all[6].
Plastic is a different question. Some plastics contain softeners called phthalates, which mix easily into oils[7]. Not every plastic contains them. Glass simply takes the question away.
What the research shows
Glass, plastic and light
Clear glass
Changed the most
Amber glass
Changed less
Fully in the dark
No change
Amber glass is good. A dark cupboard is better.
Light study: Kishimoto, 2019 [6]. Plastics: Food Packaging Forum [7].
Check 5Third-party tested, with results you can see
A good brand sends its oil to an outside lab and is happy to show you the results. Here is what to look for on a lab report:
- Leftover solvents: the oil should meet USP <467>, the standard drug makers use for leftover solvents. It puts hexane in the group that must be kept low, with a limit of 290 parts per million.
- Heavy metals: arsenic, cadmium, lead and mercury should be very low or below what the lab can detect.
- Phthalates: ideally, not detected.
- A batch number: so the report matches the oil in your hands.
The solvent limits above come from the USP chapter on residual solvents[8]. You can see our own results here[11].
You asked
What is a certificate of analysis?
It is a lab report for one batch of oil. It shows what the lab tested for and what it found.
If a brand will not share one, that tells you something too.
Dr. Marisol
Bonus checkTrust your nose and your eyes
- Smell: fresh castor oil smells faintly nutty, almost like nothing at all. Sour, sharp or chemical means old or poorly made.
- Color: pale yellow to golden. Castor oil is naturally pale yellow[1].
- Texture: very thick and slow to pour. That is normal for castor oil.
- Changes over time: the FDA advises throwing away a cosmetic if its color or smell changes[9].
Full disclosureHow our castor oil measures up
I am the founder of Queen of the Thrones®, so I am not neutral. That is exactly why I would rather show you the checks than ask you to trust me. Here is how our Golden Castor Oil does[11]:
- Check 1, USDA Organic: certified, with the seal on every bottle.
- Check 2, how it is made: cold-pressed and hexane-free.
- Check 3, ingredients: one. Ricinus communis (castor) seed oil.
- Check 4, the bottle: amber glass at every size, never plastic.
- Check 5, lab tested: meets USP limits for leftover solvents, heavy metals below detection limits, phthalates not detected.
Passes all 5 checks
Organic Golden Castor Oil
One ingredient. Cold-pressed, hexane-free and third-party tested, in amber glass.
- USDA Certified Organic
- 16.9, 8.45 or 3.38 fl oz, all in amber glass
- Pump on the large sizes, dropper on the small
Rated 4.93 out of 5 by 1,628 customers · 30-day money-back guarantee
"You should never have to take a castor oil brand at its word. Ask for the proof. Any good brand will be glad you did."
Go deeperOnce you have your oil
A one-minute ritual: castor oil in your belly button.
A longer evening rest: how to do a castor oil pack.
Less mess: why a rose quartz roller helps.
Why you can trust this guide
How this guide was made
- Written by
- Dr. Marisol Teijeiro, ND (inactive), founder of Queen of the Thrones®. She has worked in natural wellness since 2002 and is the author of two books.
- Based on
- 11 sources, including the USDA, the FDA, the US Pharmacopeia and peer-reviewed research. Each fact links to its source.
- Last reviewed
- October 30, 2026. We update this guide when the rules or research change.
- Our promise
- We do not name or criticize other brands. These are checks you can use on any bottle, including ours.
- Our products
- Queen of the Thrones® makes the castor oil in this guide. We show our own results so you can check them.
- Not medical advice
- This guide is for education. It does not replace your doctor.
- Spot a mistake?
- Tell us and we will fix it.
Sources
I believe you deserve to see where information comes from. These are the sources used in this guide.
- Patel VR, Dumancas GG, Kasi Viswanath LC, Maples R, Subong BJJ. Castor oil: properties, uses, and optimization of processing parameters in commercial production. Lipid Insights, 2016 Read the source
- Cosmetics, body care products, and personal care products. USDA Agricultural Marketing Service, National Organic Program Read the source
- Organic INTEGRITY Database public update. USDA Agricultural Marketing Service, National Organic Program, 2016 Read the source
- 7 CFR 205.270(c)(2): Organic handling requirements, volatile synthetic solvents. U.S. Code of Federal Regulations Read the source
- Cosmetic ingredient names. U.S. Food and Drug Administration Read the source
- Kishimoto N. Influence of exposure to sunlight on the oxidative deterioration of extra virgin olive oil during storage in glass bottles. Food Science and Technology Research, 2019 Read the source
- Phthalates: background article. Food Packaging Forum Read the source
- General Chapter <467> Residual Solvents. United States Pharmacopeia (USP 38) Read the source
- Using cosmetics safely. U.S. Food and Drug Administration, 2024 Read the source
- Cosmetic Ingredient Review Expert Panel. Final report on the safety assessment of Ricinus communis (castor) seed oil and related ingredients. International Journal of Toxicology, 2007 Read the source
- Product transparency: organic certificate and lab results. Queen of the Thrones® Read the source
FAQs
Your castor oil buying questions, answered
Look for 5 things: USDA Certified Organic, cold-pressed and hexane-free, one ingredient, amber glass, and third-party lab results you can see.
A pure, cold-pressed, hexane-free castor oil with one ingredient. Do a patch test first if you are new to it.
One with the USDA Organic seal and a named certifier on the label. You can look the maker up in the USDA Organic INTEGRITY Database.
Look for the USDA Organic seal, not just the word. The label must name the certifier. Then search the brand in the USDA Organic INTEGRITY Database or ask for its certificate.
Cold-pressed oil is made without chemical solvents or added heat. It is usually lighter in color and scores better on a lab freshness test than solvent-extracted oil.
Amber glass. It does not react with the oil and blocks some light. Some plastics contain softeners that mix into oils.
A sour, sharp or chemical smell, or a change in color. The FDA advises throwing away a cosmetic if its color or smell changes.
Faintly nutty, almost like nothing at all.
It is naturally one of the thickest plant oils. Thick and slow to pour is normal.
Passes all 5 checks.
Begin with one bottle.
USDA Organic, cold-pressed, hexane-free and third-party tested, in amber glass.
USDA Certified Organic · Third-Party Tested · Bottled in Glass
QUEEN OF THE THRONES®
This article is for general education only and is not medical advice. Dr. Marisol Teijeiro's naturopathic doctor license is inactive, and she does not diagnose or treat any condition. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. For external use only.