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WHIPPING oxidises TALLOW!
Sadly many uninformed Kiwi manufacturers whip their tallow balms to make them feel softer, more "modern".
But this silly marketing tactic converts skin healing tallow into a potentially harmful substance - the opposite of its intended purpose.
Whipping oxidises tallow.
Oxidation chemicals in whipped tallow can cause:
- Contact dermatitis and skin sensitization.
- Disruption of the skin's natural barrier.
- Inflammatory responses rather than healing.
- Cellular damage from free radical activity.
Whipping also adds contaminants. Atmospheric moisture and bacteria get whipped in, speeding up this oxidation.
Whipping means you're paying for thin air. Whipping replaces up to 40% of nutrient-rich tallow with thin air. Reducing a 120 ml of balm to only 70 ml of actual tallow!
Most Kiwi manufacturers also lack the specialised equipment needed for proper deodorisation.
Without it, they're stuck trying to mask that "beefy" smell with heavy artificial fragrances - but the odour always breaks through.
My balms are fully deodorised and stay dense, pure, and effective because they're never whipped!
The science
Whipping introduces several factors that accelerate tallow oxidation and degradation:
Oxygen Incorporation Whipping forcibly incorporates air into the tallow, dramatically increasing the surface area exposed to oxygen. This creates countless tiny air bubbles throughout the tallow, providing multiple oxidation sites where oxygen molecules can react with the unsaturated fatty acids in tallow.
Heat Generation The mechanical action of whipping generates friction heat, which accelerates chemical reactions. Even modest temperature increases significantly speed up lipid oxidation rates, following the general rule that reaction rates double for every 10°C increase.
Physical Structure Disruption Whipping breaks down tallow's natural crystalline structure and protective barriers. In its unprocessed state, tallow has a more stable molecular arrangement that helps protect interior fats from exposure. Whipping creates a lighter, airier texture but at the cost of structural integrity.
Light and Metal Exposure The whipping process often involves extended exposure to light and potential contact with metal implements, both of which catalyze oxidation. Trace metals act as pro-oxidants, accelerating the breakdown of beneficial compounds.
Compound Degradation Tallow's skin-healing properties come from fat-soluble vitamins (A, D, E, K), conjugated linoleic acid, and other bioactive compounds. Oxidation creates free radicals that destroy these delicate molecules, converting beneficial compounds into potentially irritating oxidation products like aldehydes and ketones.
Rancidity Development As oxidation progresses, it produces the characteristic rancid smell, indicating the formation of toxic compounds that can actually irritate skin rather than heal it. The once-beneficial tallow becomes counterproductive for skincare applications.
This is why traditional tallow preparation emphasizes gentle rendering and minimal processing to preserve its therapeutic properties.
More SCIENCE
When tallow's beneficial compounds oxidize, they undergo specific chemical transformations that create problematic byproducts:
Fatty Acid Breakdown Tallow's unsaturated fatty acids (like oleic and linoleic acid) are particularly vulnerable. When exposed to oxygen, these fatty acids undergo lipid peroxidation - a chain reaction where:
- Free radicals attack the carbon-hydrogen bonds
- This creates unstable hydroperoxides as intermediate compounds
- These hydroperoxides then decompose into aldehydes and ketones
Specific Aldehyde Formation Common aldehydes produced include:
- Hexanal - creates a grassy, rancid odor and can cause skin irritation
- Malondialdehyde - a toxic compound that can damage cellular membranes
- 4-Hydroxynonenal - particularly irritating and linked to inflammatory responses
- Acrolein - highly reactive and can cause burning sensations on skin
Ketone Production Oxidation also produces ketones like:
- Acetone-type compounds - which can dry and irritate skin
- Various methyl ketones - contributing to rancid odors and potential sensitization
Loss of Beneficial Compounds Meanwhile, the oxidation process destroys:
- Vitamin E (tocopherols) - natural antioxidants that normally protect skin
- Vitamin A compounds - important for skin cell regeneration
- Conjugated linoleic acid - has anti-inflammatory properties
- Stearic and palmitic acids - provide moisturizing and barrier-protective effects
Skin Impact These oxidation products can cause:
- Contact dermatitis and skin sensitization
- Disruption of the skin's natural barrier function
- Inflammatory responses rather than healing
- Cellular damage from free radical activity
This chemical transformation essentially converts healing tallow into a potentially harmful substance - the opposite of its intended therapeutic purpose.