Transparency
Independent lab analysis
We purchased four of the top-selling "grass-fed tallow" moisturizers on Amazon and sent them — alongside our own — to an independent, accredited laboratory for fatty acid profiling and heavy metal testing. Every result is published here. No edits, no cherry-picking.
Process
How we test
01
Buy competitors
We purchased four top-selling tallow moisturizers directly from Amazon — the same products any customer would receive.
02
Send to an independent lab
All five samples were sent to an independent, A2LA ISO 17025 accredited testing facility for GC-FID fatty acid profiling and ICP-MS heavy metal analysis.
03
Publish everything
We don't summarize or interpret selectively. Every data point is published exactly as the lab reported it.
Education
Understanding fatty acid profiling
Every fat has a unique chemical fingerprint — a specific combination of fatty acids in specific ratios. Grass-fed beef tallow, coconut oil, olive oil, seed oils, and petroleum-based synthetics all produce completely different profiles when tested.
Fatty acid profiling uses gas chromatography (GC-FID) to break a sample down into its individual fatty acid components and measure the exact percentage of each. The result is essentially a chemical ID card that reveals exactly what fats are present — and more importantly, what's missing.
There are two things we're looking at:
Total fatty acid content — Real tallow is almost entirely fat. A genuine tallow-based product should show a high total fatty acid percentage. If the total is low (under 20%), the product is predominantly something other than fat — likely petroleum, wax, or synthetic fillers.
Linoleic acid percentage — This specific fatty acid distinguishes grass-fed from grain-fed tallow. Grass-fed tallow typically contains less than 2% linoleic acid. Grain-fed runs higher. Seed oils contain 10-60%. It's the clearest single marker of fat source quality.
Results
What the lab found
Five products tested. One verified pure. One real but mislabeled. Three completely fake.
Fallow Facial Moisturizer
Our product — multi-ingredient formula (tallow, olive oil, beeswax, raw honey, frankincense)
Total fatty acids
79%
Linoleic acid
0.4%
Stearic acid
29.7%
Heavy metals
None detected
Our moisturizer is a finished formula containing five ingredients — not pure tallow — which is why the total fatty acid content is 79% rather than 90%+. The remaining 21% is beeswax, raw honey, and frankincense essential oil. The fatty acid profile confirms genuine grass-fed beef tallow: high stearic acid (29.7%), strong ruminant fat markers (C15:0 at 15.7%, margaric acid at 12.9%), and critically low linoleic acid (0.4%) — well below the 2% threshold that indicates grass-fed sourcing. Zero heavy metals detected across lead, arsenic, cadmium, and mercury.
Brand A
Top-selling Amazon tallow balm — claims "organic" and "grass-fed"
Total fatty acids
94%
Linoleic acid
2.7%
Oleic acid
41.3%
Heavy metals
None detected
This product is real tallow — the fatty acid profile is consistent with genuine beef fat. However, the 2.7% linoleic acid and high oleic acid (41.3%) indicate grain-fed, not grass-fed, sourcing. This matters because grain-fed tallow has a less favorable fatty acid ratio and comes from cattle raised on feed rather than pasture. The product is marketed as "grass-fed" — the lab results suggest otherwise. No heavy metals were detected.
Brand B
Top-selling Amazon "wrinkle defense" tallow balm
Total fatty acids
12%
Linoleic acid
0.1%
Stearic acid
3.6%
Heavy metals
None detected
This product is not tallow. Only 12% of the sample registered as fatty acids — real tallow is 90%+. The stearic acid reading of 3.6% and oleic acid of just 1.2% are far below what any animal fat would produce. The remaining 88% of this product is likely a petroleum-derived base (mineral oil, petrolatum) or synthetic wax with a small amount of fat blended in for texture. This product is sold as "beef tallow" on Amazon.
Brand C
Top-selling Amazon "beef tallow for skin" — unscented
Total fatty acids
10%
Linoleic acid
0.1%
Caprylic acid (C8)
1.6%
Heavy metals
None detected
Not tallow. Only 10% fatty acid content. The presence of caprylic acid (C8:0) and capric acid (C10:0) — fatty acids found in coconut and MCT oil but not in beef tallow — suggests this product uses a coconut or MCT oil base rather than animal fat. The stearic acid reading of 1.2% makes it impossible for this to contain any meaningful amount of tallow. This product is sold as "beef tallow for skin" on Amazon.
Brand D
Top-selling Amazon "whipped beef tallow" with honey
Total fatty acids
3%
Linoleic acid
0.1%
Stearic acid
1.1%
Heavy metals
None detected
The worst result in our testing. Just 3% total fatty acid content — a product claiming to be "whipped beef tallow" is 97% something that isn't fat. The palmitic acid reading of 1.6% and stearic of 1.1% are negligible. This product is almost certainly a petroleum or synthetic wax base with trace amounts of fat. It is sold as "whipped beef tallow" on Amazon.
Reference
What to look for in real tallow
If you want to verify any tallow product yourself, here's what to check. Request a fatty acid profile from the brand. If they won't provide one, that tells you everything.
Expected fatty acid ranges
Want the raw lab reports?
Email proof@fallow.co and we'll send them. Competitor names redacted — we're not looking for lawsuits, just making a point.
If you're not testing, you're guessing.
We're the only tallow brand that publishes verified lab results. Now you know why.
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Every batch tested. Every result published.