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Hydrolyzed Fish Protein: Effects on the Body and Slimming Properties
Hydrolyzed fish protein has gained popularity as a dietary supplement in recent years. But what is it exactly, and what effects does it have on the body? In this article, we will explore hydrolyzed fish protein and take a closer look at its potential slimming effects, as well as its versatile applications and sustainable properties.

What is Hydrolyzed Fish Protein?
Hydrolyzed fish protein is a protein powder made from fish. Unlike regular fish meal, where the proteins remain intact, the proteins in hydrolyzed fish protein are broken down into smaller peptides and amino acids. This process, called hydrolysis, makes the protein easier for the body to absorb. Hydrolyzed fish protein can be produced from a variety of fish species and raw materials, including muscle, skin, trimmings, innards, heads, bones, and fish skeletons. It is typically available as a cream-colored powder with a characteristic fishy smell. Hydrolyzed fish protein is a source of protein for humans, offering a balanced amino acid composition and a positive effect on gastrointestinal absorption.

How is Hydrolyzed Fish Protein Produced?
Hydrolyzed fish protein is produced by breaking down fish proteins into smaller units. This can be done using enzymes, acids, bases, or bacterial fermentation. Enzymatic hydrolysis is the most common method as it allows better control over the process and the properties of the final product. During hydrolysis, the long protein chains are broken down into shorter peptides and amino acids. Enzymes used in the hydrolysis process are classified as exoproteases and endoproteases. Exoproteases remove amino acids from the ends of the protein chain, while endoproteases break bonds within the chain. Optimal hydrolysis is achieved using an enzyme/substrate ratio, a temperature of 40°C, and a pH of 6. The hydrolysis time may vary, but studies indicate that different durations yield varying degrees of hydrolysis.

Effects on the Body
Hydrolyzed fish protein has a number of potential health benefits. Studies have shown that it can contribute to:

  • Increased muscle growth: As a good source of protein, hydrolyzed fish protein can help build and maintain muscle mass.
  • Improved digestion: The hydrolyzed peptides are easier for the body to digest than intact proteins.
  • Reduced inflammation: Some studies suggest that hydrolyzed fish protein may have anti-inflammatory properties, both in the gut and in the body overall.
  • Antioxidant effects: Hydrolyzed fish protein may contain antioxidants that protect cells from damage.
  • Better immune function: Studies have shown that hydrolyzed fish protein can strengthen the immune system.
  • Heart health: Hydrolyzed fish protein may help reduce the risk of cardiovascular diseases.
  • Brain health: Studies indicate that hydrolyzed fish protein may help prevent cognitive decline during aging.
  • Gut health: Hydrolyzed fish protein can help improve gut health.
  • Anti-cancer properties: Hydrolyzed fish protein may contain bioactive peptides with anti-cancer potential.
  • Reduced plasma triacylglycerol levels.
  • Prevention of dyslipidemia and atherosclerosis.
  • Stimulation of cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1) secretion.

Slimming Effect
Some studies indicate that hydrolyzed fish protein may have a slimming effect. A study on overweight rats showed that a high-protein diet with hydrolyzed fish protein led to lower body weight compared to a diet based on casein/whey protein. Studies on overweight individuals have shown that hydrolyzed fish protein may reduce BMI and body weight. It may also help decrease body fat and increase muscle mass.

Hydrolyzed Fish Protein vs. Other Protein Sources
Hydrolyzed fish protein is an excellent protein source, but how does it compare to other protein sources?

  • Hydrolyzed fish protein (cod): Easily digestible, high biological value.
  • Hydrolyzed fish protein (Nile tilapia): Easily digestible, high biological value.
  • Whey protein: Quickly absorbed, high biological value.
  • Casein protein: Slowly absorbed, highly satiating.
  • Soy protein: Plant-based, complete protein.
  • Egg protein: High biological value, versatile.

Conclusion
Hydrolyzed fish protein is a promising dietary supplement with a variety of potential health benefits. It is an excellent protein source and can contribute to increased muscle growth, improved digestion, and a strengthened immune system. Studies suggest that it may have a slimming effect, but more research is needed to confirm this.