Custom Body Lotion and Body Butter: Formulation Notes
Body lotion and body butter sit next to each other on the shelf and are made from the same basic components — water, oil, emulsifier, thickener, preservative. What separates them is how much oil and which oil, and that single decision cascades into cost, texture, stability and packaging.
Lotion Versus Butter: The Real Difference
A body lotion typically runs 5 to 15 per cent oil phase. It spreads easily, absorbs quickly, and works in a pump bottle. A body butter runs 25 to 60 per cent oil and is usually packaged in a jar, because it is too thick to pump without a specialised dispenser.
In between sits body cream, usually 15 to 25 per cent oil, which is where most successful commercial body products live — richer than a lotion, easier to apply than a butter.
If you are developing your first body product, cream is usually the safer choice. Butters feel premium but are polarising: some customers love the density, others find them greasy.
Choosing the Oil Phase
This is where cost moves fastest. The oil phase determines how the product feels on skin, how long it lasts, and how it behaves in heat.
- Mineral oil and petrolatum — the classic workhorses. Cheap, excellent occlusive performance, extremely stable. Increasingly unpopular with consumers who read ingredient lists, but technically hard to beat for a value line.
- Caprylic/capric triglyceride — a fractionated coconut derivative. Light, stable, almost odourless, moderate cost. The default in most modern formulas.
- Shea, cocoa and mango butters — rich, good marketing story, variable quality. Natural butters vary batch to batch, which means the same formula can feel different in August and February unless the supplier adjusts.
- Squalane, jojoba, argan — premium feel and premium price. Usually used at low percentages as a supporting oil rather than as the main phase.
- Silicones (dimethicone, cyclopentasiloxane) — not strictly oils but often counted in the oil phase. They deliver slip and a dry finish, and they are what make a lotion feel silky rather than heavy.
Emulsifier Selection Sets the Structure
The emulsifier decides whether you get a thin lotion or a thick cream from similar oil loads, and whether the product resists separation over three years. There are broadly two families:
Anionic emulsifiers — traditional, efficient, good skin feel, lower cost. Sensitive to pH and to certain actives.
Non-ionic and polymeric emulsifiers — more forgiving of pH and electrolytes, generally milder, higher cost. Polymeric emulsifiers give a distinctive gel-cream texture that many premium brands use.
Ask your manufacturer which family they recommend and why. A formulator who can explain the trade-off is a formulator who will catch problems before they reach the batch.
Thickeners, Texture and Fill Weight
Viscosity in a body product is largely a function of the thickening system, not the oil load. Common choices include carbomer, xanthan gum, fatty alcohols and associative thickeners. The choice affects not only thickness but also how the product behaves when the customer has wet hands — a detail that decides whether your body wash and lotion get repurchased.
Fill weight tolerances matter here too. A jar that claims 200 ml is filled by weight, and density varies with the formula. Specify both the density range and the fill weight, or you will find yourself in a conversation with a regulator about net content.
Testing That Actually Applies to Body Products
- Accelerated stability — especially important with natural butters, which are the most temperature-sensitive component in the formula.
- Preservative efficacy — jars are opened repeatedly with wet hands, which is the harshest real-world condition in cosmetics.
- Packaging compatibility — jars and pumps behave very differently, and the same formula may work in one and not the other.
- Freeze-thaw cycling — critical if the product will be shipped in containers through cold climates.
Where Body Product Development Goes Wrong
The most frequent issue is a formula approved in summer and manufactured in winter, when the natural butter component behaves differently. The second is a fragrance that destabilises the emulsion after two months — invisible in a sample, obvious in a pallet. Both are prevented by buying time for stability testing rather than compressing it.
Develop Your Body Care Range With Us
OEM COSMETICS ODM produces body lotions, creams and butters from ISO 22716 and GMP certified lines, with both natural-butter and modern synthetic oil systems available. Tell us the retail price point and the feel you want, and we will recommend an oil phase that fits both.
Talk to our team: WhatsApp +86 18709713948 · Email adon@oemcosmeticsodm.com · Website www.oemcosmeticsodm.com