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A considered choice

Acidophilus for your everyday.

Meet Lactobacillus acidophilus NAS in Natren capsules and powder. Choose capsules or powder to suit your routine.

Megadophilus - Capsules 30 capsules

One-time $25.25 USD

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4.9 / 5 · 67 reviews
Megadophilus - Capsules
Compare capsules and powder What to check
Megadophilus - Capsules · 30 capsules
Original product packaging in an illustrative setting.
01Made by NatrenOur own California facility02Known by strainDetails worth a closer look03A routine of your ownCompare formats and options

General product information

Make the label your starting point

Compare Natren formulas by their listed strains, format, ingredients and storage instructions. Open each product for its current label, sizes and purchase options.

Choose a size on the product page, then review the current one-time and subscription options. A subscription requires your separate choice.

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Confidence in the details

Three things to check

  1. Find the exact strain on the current label.

  2. Compare format, ingredients and label directions.

  3. Review storage instructions and available sizes.

A Natren laboratory technician working with a pipette and flask.

From the Natren laboratory photo archive

Natren. Since 1982.

The culture is in
the details.

Look for the strain identifier, not just the species name. Our human probiotics are made in our own California facility.

Explore our approach

A closer look

A precise comparison

A familiar species name is a starting point. The strain, formulation and current label make the comparison more useful.

Review what is in the formula, how to store it and which format fits your routine before choosing a size or purchase option.

Read beyond the species name

Lactobacillus acidophilus names a species. Look for the strain designation on the current label and check that any research concerns the specific strain and formulation.

Choose a practical format

Compare the listed capsule or powder format, ingredients and label directions. A higher culture count or price alone does not establish a better clinical outcome.

Before you choose

A few useful questions

What is Lactobacillus acidophilus?

Lactobacillus acidophilus is a bacterial species used in some probiotic products. A species name does not identify the exact strain. Natren Megadophilus labels identify Lactobacillus acidophilus NAS; compare the current capsule and powder labels before choosing.

Do I need to start with a subscription?

Review the available one-time and subscription options on the product page. Choose a subscription only after reviewing its price, billing and delivery terms.

Where can I see current sizes and prices?

The product page shows current available variants and purchase options. Prices and stock can change; review them on the product page before choosing.

Sources

Updated October 29, 2026. Sources checked October 29, 2026.

Contact Natren for product information. Discuss individual clinical questions with your healthcare professional.