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Source Naturals, MSM Powder, 35 oz (1000 g)

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$22.99 (46)
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In Stock
  • Expiration Date: Oct 2019
  • Shipping Weight: 2.9 lbs (1.32 kg)
  • Product Code: SNS-01497
  • UPC Code: 021078014973
  • Package Quantity: 35 oz (1000 g)
  • Dimensions: 4.625 x 4.625 x 6.625 in, 2.45 lbs (1.11 kg)
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Product Overview


  • Dietary Supplement
  • (Methylsulfonylmethane)

MSM serves as an important source of bioavailable dietary sulfur, a mineral that plays a critical role in maintaining the integrity and elasticity of connective and other tissues. It is an important component of proteins found throughout the body, such as in hair, nails, skin and tendons. MSM is a naturally occurring form of organic sulfur found mainly in protein-rich foods such as eggs, fish and lean meat. Taking MSM each day helps to replenish the body's supply of sulfur.

Suggested Use

1/2 teaspoon daily, briskly stirred or blended, with 8 ounces of water or juice.

Other Ingredients

Suitable for vegetarians and Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives or artificial color, flavor or fragrance.


Store in a cool, dry place.

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.

Packaged by weight, not by volume. Settling may occur.

Supplement Facts
Serving Size: 1/2 Teaspoon (approx. 2.6 g)
Servings Per Container: 384
  Amount Per Serving %DV
MSM (methylsulfonylmethane [OptiMSM]) 2.6 g
†Daily Value not established.
iHerb Customer Reviews


Posted by Hungarian on Aug 02, 2016

the best price/value Opti MSM

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smooth and effective

Posted by Reviewer1287175 on Apr 22, 2016

This is a great source of MSM, you can trust their purity more than the cheaper brands.

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MSM: quality and the proper size for the "serious" user.

Posted by 5727801729224735930 on Jan 07, 2016

From my experience this is the best quality I've found. Smaller sizes are just not practical for the person who understands why MSM is most worthwhile to take regularly. Kudos to iHerb for offering the brand in the 1 kilo size.

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Bulk MSM

Posted by Reviewer3035278 on Dec 24, 2015

A great source of MSM - goes down well

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Posted by SoftDlight on Sep 10, 2015

I've seen a difference mainly with my hair growth. I'm not even worried about going for a haircut anymore because I know it will grow back super fast. Got a few comments from family members that it's too bitter to drink with water, but its fine for me and I barely taste it. I've been using half a spoon and going to start going higher now. Absolutely love it !

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