DL-Methionine is an essential amino acid that can be obtained through both dietary sources and supplements. It is found in a variety of foods, including egg whites, free-range chicken, turkey, wild-caught fish, and plant-based options such as seaweed, spirulina, brazil nuts, oats, sesame seeds, and sunflower butter. This broad availability makes it accessible through a balanced diet, though supplements are often used to ensure adequate intake.

Also Known As

DL-Methionine is scientifically known as 2-amino-4-(methylthio)butanoic acid. Other names include:

  • Methionine
  • L-Methionine (when referring specifically to the naturally occurring isomer)
  • DL-Methylthioalanine


DL-Methionine is widely used in various applications, including dietary supplements, animal feed, and specific medical treatments. It plays a crucial role in human and animal nutrition by supporting essential bodily functions such as the prevention of urinary tract infections and controlling odors in pet waste. Its use extends beyond nutritional supplements, with applications in the pharmaceutical industry to prevent certain types of urinary crystals and in pet care products.


DL-Methionine is a critical component in the diet, serving as an essential amino acid that the body cannot synthesize on its own. Its significance lies in its various functions, including:

  • Supporting the production of important molecules: DL-Methionine is involved in the synthesis of S-adenosylmethionine, a vital molecule in many biological processes.
  • Detoxification and metabolic support: It plays a role in detoxification and as a precursor for other amino acids.
  • Preventing urinary tract issues: Specifically formulated supplements can help prevent the formation of harmful urinary crystals.

Common Dosage

For adults, the recommended dosage of DL-Methionine is 13 mg per kilogram of body weight per day. This dosage ensures adequate intake to support the body’s needs without excessive supplementation.


DL-Methionine is an indispensable amino acid obtained through both diet and supplements, vital for various bodily functions from metabolic support to urinary tract health. Its importance is underscored by:

  • Its presence in a wide range of foods and availability in supplement form.
  • The role it plays in detoxification and as a building block for other essential molecules.
  • Its specific use in preventing urinary tract conditions and managing pet odors.

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