Lactobacillus acidophilus NAS - A Natren Probiotic Strain

Lactobacillus acidophilus NAS is a strain developed by Natren Inc in California, USA and is sold only in their products. It has outside research to support it as a probiotic. It has the properties attributed to most L. acidophilus, including that of being a lactic acid bacteria.

According to company records:

  • It is a hydrogen peroxide-producing strain
  • It is able to maintain adherence to intestinal cells in vitro (in a laboratory setting) without a milk base making this strain ideal for people with milk allergies
  • It also showed excellent bile tolerance in a third-party verification study by Silliker Laboratories.

Should You Be Taking Lactobacillus acidophilus NAS?

I can help you decide if this probiotic strain is suitable for you to try. If you do try it, I still recommend that you use it as part of a probiotic/beneficial microbes support plan including naturally fermented foods and drinks and probiotic-fortified foods and drinks.

Where Can You Find This Probiotic Strain by Natren?

In the US, Lactobacillus acidophilus NAS is found in Natren probiotics. Unlike many manufacturers, Natren only produces probiotics and their manufacturing practices are certified by a third-party international agency. They produce their probiotics in a pharmaceutical-grade facility and do their own culture maintenance, oil-encapsulation and freeze-drying process. Every step of the way is performed under continuous refrigeration to ensure maximum product life. The products are bottled in dark amber-glass with tin lids to prevent moisture and light from harming the products.

When you buy directly from Natren via my links, they always ship their probiotics with 2-day air shipping with blue ice and both blue ice and dry ice during hot summer months in specially-designed, thermally-controlled boxes to protect the potency. Natren does everything it can to guarantee that your probiotics will perform at their optimum levels through the expiration date on the label. That is why the links below will take you to the Natren website.

Another option for purchase in the US, Vitacost, is also listed below. Vitacost stores this product in the refrigerated section of their warehouse and will ship refrigerated probiotics with a cold pack. They recommend that you choose 1- or 2-day shipping.

Sorry, I do not have a resource for international readers.

The NAS strain is available from Natren in:

Healthy Trinity. – Marketed to relieve occasional gas, irregularity and indigestion.

Natren Healthy Trinity – Click here to read my product review.

Natren Probiotics

Natren GY-Na-Tren – Marketed for supporting vaginal and urinary health.

Contains Two bottles of capsules: one is a vaginal homeopathic suppository and one is an oral capsule containing 5 billion CFU of NAS with potato powder, garbanzo bean (chick pea) powder, among others.
Natren GY-Na-Tren has Lactobacillus acidophilus NAS plus a homeopathic remedy

Natren Mega-Dophilus Dairy-Free capsules – Marketed to optimize digestion, for general wellness, for digestion of dairy products and for small intestine health.

Dairy-Free Capsules, minimum 2 billion CFU per capsule. Contains potato powder, garbanzo bean (chick pea) powder, among others.
Natren Mega-
Dophilus has Lactobacillus acidophilus NAS
Natren Mega-Dophilus Dairy-Free powder – Marketed to optimize digestion, for general wellness, for digestion of dairy products and for small intestine health.

Dairy-Free Powder, minimum 2 billion CFU per half-teaspoon. Contains garbanzo bean (chick pea) powder and cellulose.
Natren Mega-
Dophilus Dairy-Free has Lactobacillus acidophilus NAS

Lactobacillus acidophilus NAS can be found from Vitacost (click on pictures) in:

Healthy Trinity 60 capsules

Healthy Trinity 30 capsules

Healthy Trinity 14 capsules (ideal if you want a small amount to try it)

Mega Dophilus Dairy-Free 3 oz powder


Go to the Lactobacillus acidophilus page.

Go to the Lactobacillus page.

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