Formal Name: L-2-amino-4-(methylthio)butyric acid
Supplement Forms: Pills, food, liquid

Recommended Daily Allowance

  • Infants: (0 to 12 Months) N/A
  • Children: (1 to 13 years) N/A
  • Adolescents: (14 to 18 Years) N/A
  • Adults: (19 and Older) N/A
  • Lactating Women: N/A
  • Pregnant Women: N/A

Notes: There is no established RDA for the Methionine amino acid.

Additional Information

Methionine is an essential amino acid that was first identified in 1922. It contains sulphur and is most influential in its production in glutathione, one of the body’s most abundant antioxidants. Like glutathione, methionine it self acts as an antioxidant assisting in the protection of certain organs and helping reduce overall damage that occurs from free radicals and accumulation of toxins.

Bodily Functions Methionine Assists

The liver receives the greatest benefits from the availability of methionine. It is needed to regulate glutathione, which helps protect the liver from toxin damage. Additionally, methionine prevents the accumulation of fat in the liver, allowing the organ to function normally. With its presence, cholesterol and fatty acids can be metabolized. The nutrient creatine, which the muscle tissues need, can be properly synthesized when methionine is available. This amino acid is also present in the skin where it promotes healthy collagen formation.

Symptoms Of Deficiency:
  • Associated with choline deficiency
  • May lead to chronic rheumatic fever in children
  • Contributes to cirrhosis – liver hardening
  • Contributes to kidney nephritis – inflammation of the kidney
Foods High In Methionine

Quality sources of methionine include whole grains, meats, poultry, fish, milk and milk products. Additionally, peaches, grapes, and leafy vegetables contain adequate amounts of methionine.

Ailments That Methionine Helps Against:
  • Treats endometriosis
  • Reduces symptoms of associated with endometriosis
  • Contributes to the treatment of depression
  • May help arthritis pain
  • Can improve memory in patients with AIDS-related diseases
Side Effects And Toxicity

Toxicity and side-effects of methionine remain unclear. However, suggestions of effects when taking high doses of methionine include the increased risk for arteriosclerosis and high blood cholesterol levels.

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