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Source Naturals, L-Methionine, 3.53 oz (100 g)

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Source Naturals, L-Methionine, 3.53 oz (100 g)

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Source Naturals, L-Methionine, 3.53 oz (100 g)

In Stock
  • Expiration Date: 11/2019
  • Shipping Weight:
    0.35 lbs
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  • Product Code: SNS-00145
  • UPC Code: 021078001454
  • Package Quantity: 3.53 oz
  • Dimensions:
    2.4 x 2.4 x 4.5 in, 0.3 lbs
    Switch to Metric units
Frequently Purchased Together
Product Overview


  • Amino Acid Supplement
  • Free-Form Powder

L-Methionine is an essential sulfur-containing, free-form amino acid. It contributes to the synthesis of S-adenosyl-L-methionine (SAMe), which is necessary for normal brain function, and L-cysteine, which is a component of glutathione, an important antioxidant molecule in the body. L-Methionine is also a transporter of the antioxidant mineral, selenium.

Suggested Use

1/4 to 1/2 teaspoon daily between meals. If you experience stomach irritation, take with meals.

Other Ingredients

Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, preservatives, or artificial color, flavor or fragrance.


Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 1/2 Teaspoon (approx 1.5 g)
Servings Per Container: 66
  Amount Per Serving % Daily Value
Calories 5  
L-Methionine 1.5 g
†Daily Value not established.
iHerb Customer Reviews

Good for my cat with urinary problem

Posted by iHerb Customer on Mar 16, 2017 | Verified Purchase

My cat took 1/8 tsp daily. It acidifies the pH of my cat's urine. But it can only be taken for 1 month, otherwise the urine will be too acidic and brings another urinary issue.

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good price

Posted by iHerb Customer on May 29, 2015 | Verified Purchase

I bought it to add to my pre-workout.

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Suggest trying a smaller dose first

Posted by Health-Is-Wealth on Dec 21, 2014 | Verified Purchase

I find pure powder is always the best option (more likely to be hypoallergenic). However - I find 1.5g of this is a large dose to take in one go by itself (and may result in upset stomach noted by others etc). For comparison - 140g of cooked chicken breast contains approx 1.2g (though is a whole food and therefore less likely to be problematic). I find I tolerate smaller doses of this better - generally 1/8 tsp at a time, approx 375mg. No stomach upset or other issues. If this review was helpful to you, please click YES below - thank you. For reviews of all the products I have purchased from iHerb, please click my username above.

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Posted by Anaterma on Jul 14, 2014 | Verified Purchase

my stomach is not the easiest to upset but this actually cause me to have some ache when taken without food. so just like the instruction said i continued to take it with food. tastes and smells kinda nasty. not the easiest to dilute, i usually add it to milk products, like kefir. no calming or otherwise noticeable beneficial effect. probably won't repurchase.

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Posted by run4bear on Jul 01, 2012 | Verified Purchase

I noticed no difference.

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