How can you support your immune health?  

The strength of your immune system varies with the seasons. Around a quarter of human genes show clear seasonal variation, according to recent research(1). This annual change in gene activity significantly alters immune function, which is why some inflammatory health conditions - like stiff joints, rheumatoid arthritis and heart disease - are often more severe in the winter months.

One way to combat these seasonal changes is to support your immune health with Rosita Ratfish Liver Oil.   

Rosita Ratfish Liver Oil

Rosita Ratfish Liver Oil (RLO) has remarkable anti-inflammatory qualities and has been shown in recent studies to stimulate the immune system(2). RLO has been widely used for centuries as a complementary medicine in Scandinavian countries, where it is often described as the ‘Gold of the ocean’. The most important therapeutic feature of this oil is that it is very rich in ‘alkylglycerols’.

What are ‘alkylglycerols’?

“Alkylglycerols” (AKG) are naturally occuring ether-lipids. They are a unique fatty nutrient found in potent levels in certain marine species, notably ratfish liver oil. There are multiple studies showing that AKG upregulates your immune system, and it is currently being investigated for its ability to prevent and inhibit the development of certain cancers (including breast cancer, prostate cancer and brain cancers(3)).  

Beneficial fatty acids

Ratfish Liver Oil is a good source of a wide range of essential fatty acids. It contains omega-3, omega-4, omega-6, omega-7, omega-9 and omega-11 fatty acids in their naturally occurring forms as well as a naturally low ratio of vitamin A to vitamin D. RLO also contains natural antioxidants such as squalene that protect cells against free radical damage.

Why choose Rosita?

Rosita Real Foods is a trusted source of wild-caught, raw fish liver oils, rendered from sustainably harvested fish living in the crystal clear waters of the remote Norwegian Fjords. Rosita Ratfish Liver Oil is pure and additive free. RLO is very different to skate liver oil, which is a cheaper and much less beneficial product as it does not contain the same range of unique fatty nutrients(4).

All Rosita Real Foods fish oils are tested by independent third-party laboratories which have consistently shown that their oils contain no mercury, lead or cadmium. While other providers need to use heat during the extraction process, Rosita is the only company to hold a patent for a chemical free and heat free method to clean the oils. No heat, chemicals or mechanical pressure is used in the extraction process, so this provides you with the closest possible freshness and nutrients as would be found in a living fish.

How do I take Rosita Ratfish Liver Oil?

Rosita RLO has a mild, buttery taste and is less fishy than cod liver oil. The oil will get absorbed easily with the taste dissipating quickly. 

The dosage recommendations are:

  • 4 - 8 drops daily or as needed, with food. (low / maintenance dose)
  • 10-12 drops daily (medium maintenance dose)
  • Special Protocols and intensive dose (Under the supervision of a qualified healthcare practitioner only): 10 -12 drops twice daily for a period of 6 weeks, followed by a maintenance dose of 4 - 12 drops daily.


1. Seasons affect 'how genes and immune system work' 
2. Biochemical characterization of ratfish (Chimaera monstrosa) liver oil; cytotoxic and antineoplastic evaluation in cancer cell lines 
3.  Alkylglycerols Studies  
4. Ratfish Liver Oil is not Skate Liver Oil