Ratfish Liver Oil Testing

There’s no other option to doing what’s right in the name of our customers’ health and safety.

So every and every batch of Rosita fish liver oil is third-party tested in a microbiological lab and certified to meet strict European regulations for potency and purity. Check out the analytical testing results for our Ratfish Liver Oil.

Each and every batch of Rosita Extra Virgin Ratfish Liver Oil is third-party tested in a microbiological laboratory and certified to meet strict European regulations for potency and purity.

We offer transparent access to our test results, which consistently prove that our oils meet international quality standards. This way, you can enjoy our safe and effective products with peace of mind.




EU regulations 1.75 pg/g 6.0 pg/g 200 ng/g
Production date: Jan. 31, 2022 (Testing by EUROFINS Report #440-2022-0201-130)
BBE (fridge/freezer): Feb. 2025/2027
0.207 pg/g 1.49 pg/g 85.1 ng/g
Production date: Feb. 3, 2021 (Testing by EUROFINS Report #440-2021-0209-056)
BBE (fridge/freezer): Feb. 2024/2026
0.13 pg/g 0.51 pg/g 176 ng/g
Production number: 1031-200119, 1032-200119, 1033-200119, 1034-200119. (Testing by EUROFINS Report #440-2020-0123-100) 
BBE (fridge/freezer): Jan. 2023/2025
0.545 pg/g
0.824 pg/g
163 ng/g
Production number: 1026-190319, 1027-190319, 1028-190319, 1029-190319, 1030-190319. (Testing by EUROFINS Report #440-2019-0325-077) 
BBE (fridge/freezer): Apr. 2022/2024
0.328 pg/g
0.605 pg/g
195 ng/g
Production number: 1020-180510, 1021-180510, 1022-180510, 1023-180510, 1024-180510, 1025-180510 (Testing by EUROFINS Report #440-2018-0628-065)
BBE (fridge/freezer): June 2021/2023
0.336 pg/g 0.650 pg/g 180 ng/g
Production number: 1016-180423, 1017-180423, 1018-180423, 1019-180423 (Testing by EUROFINS Report #440-2018-0425-104)
BBE (fridge/freezer): May 2021/2023
0.335 pg/g 0.94 pg/g 164 ng/g
Production number: 1013-180118, 1014-180118, 1015-180118 (Testing by EUROFINS Report #440-2018-0118-157)
BBE (fridge/freezer): Feb. 2021/2023
0.340 pg/g 0.76 pg/g 143 ng/g
Production number: 10xx-160212 (Testing by EUROFINS Report #440-2016-0217-086 and BDS – Report #8596-1)
BBE (fridge/freezer): Mar. 2019/2021
0.700 pg/g 1.20 pg/g 105 ng/g
Production number: 10xx-150728 (Testing by BDS – Report # 7195-1)
BBE (fridge/freezer): Aug. 2018/2020
0.390 pg/g 1.10 pg/g 140 ng/g

Nutrient data from independent analytical testing

Our oil contains a wide spectrum of naturally occurring fatty acids, fat-soluble nutrients, antioxidants and naturally occurring biologically active alkylglycerol lipids.

A serving based on 10 drops/0.5 ml provides these naturally occurring nutrients (values quoted are minimum values):

  • Vitamin D3: Approximately 475 IU (for 1 teaspoon = 4,750 IU).
  • Vitamin A: This fat-soluble vitamin has been harder to accurately measure and the testing institute states that this is likely because of the unusual lipid composition of our ratfish oil.
  • Vitamin E: 0.22 mg
  • Vitamin K2: Testing for K2 in marine oils is not yet accurate so we have not tested for this vitamin.
  • Whole range of fatty acids: Omegas 3, 4, 6, 7, 9, 11, etc.
  • Total n-3 PUFA: 27 mg
  • EPA: 12.2 mg
  • DHA: 8 mg
  • Total n-6 PUFA: 11 mg
  • Phytosterols: Campesterol, stigmasterol and ∆5-avenasterol
  • Alkylglycerols: Value range 14.4% to 30%. Ratfish liver oil has a very unusual lipid composition because it is an exceptional source of rare biological lipids called alkylglycerols. 

This is a 100% unprocessed oil and so nutrient levels will vary from harvest to harvest, in accordance with natural seasonal and geographic variations. We will never add or take anything away from our oils. The levels are what you would find present in the oil of a "living" wild fish liver.

Nutrition Facts

Wild & Raw Extra Virgin Ratfish Liver Oil: 10 ml
Suggested Serving Size: 10-12 drops daily
Servings per Bottle: Approximately 20

Amount Per Serving

Calories 5.6     Calories from Fat 5.2
% Daily Value*
Total Fat 0.5g 0.8%
Saturated Fat 0g 0%
Trans Fat 0g 0%
Cholesterol 0.9mg 0.3%
Sodium  76µg 0.003%
Total Carbohydrate 19.6mg 0.007%
Sugars  0mg 0%
Protein  2mg 0.004%

* Percent Daily Values are based on a caloric intake of 2,000 calories.

Does Not Contain: Gluten, yeast, milk derivatives, synthetic nutrients, artificial colors or flavors.

Our In-House Expert

Formulated by a Ph.D. Scientist specializing in Nutrition & Marine Oils

Rosita fishing boat

Dr. Pieris Andrew Nicola, Ph.D., Chief Science Officer

Dr. Pieris Andrew Nicola is the Rosita family's scientist and products/nutrition specialist, who leads our research and development. He is a graduate of the University of Oxford, with a specialty, and multiple degrees in nutrition. Dr. Nicola is a leading authority in his field and also among the best in the sciences of marine oils.