★★★★★
“I love this brand. One capsule is all I need to take per day to feel some benefit. It's really not all that pricey when you consider how many capsules you have to take using other brands. I will continue to buy this one.”MmhVerified Purchase
iSerra® High-Activity Serrapeptase
250,000 SPU Serrapeptase. Built to a Higher Standard.
A premium serrapeptase formula with Bilamex™ Dual-Phase Delivery, finished-product disintegration testing, and Veriphase™ lot-specific verification.
★★★★★4.8/5 from 38 customer reviews
250,000 SPU per capsule in a one-capsule serving.
Bilamex™ Dual-Phase Delivery: delayed-release capsule + coated particles.
Evidence you can inspect: finished-product testing and lot-level verification.
iSerra® Serrapeptase — 90 Capsules90 one-capsule servings · 250,000 SPU per capsule
Free U.S. shipping90 servings30-day guarantee
30-day money-back guarantee on eligible direct purchases. Product return is required; customers generally pay return shipping unless the return is due to an iEnzymes error. Refund Policy.
Featured Verified Purchase Reviews
What customers say about iSerra.
Presented verbatim as customer experiences. Individual results vary; testimonials are not medical advice or a guarantee of results.
★★★★★
“This product does what it is supposed to do and is an excellent choice when considering a Serrapeptase Enzyme. I found taking this product to be beneficial to my health. I am very happy with this product and give it 5 stars.”CarolVerified Purchase
★★★★★
“I looked up information about this product and decided it is what I need. Seems to be working for me.”PhyllisVerified Purchase
★★★★★
“Easy to take. Dr recommended.”MimiVerified Purchase
Customer testimonials reflect individual experiences and do not establish clinical efficacy. “Dr recommended” is a customer statement, not a medical endorsement by iSerra.
The iSerra Difference
More to inspect than the number on the front label.
iSerra makes the activity specification, delivery architecture, finished-product method, and lot-level evidence visible.
250,000SPU per capsule
Declared serrapeptase enzyme activity in a one-capsule serving.
Bilamex™Dual-Phase Delivery
A delayed-release capsule surrounds coated enzyme-containing particles.
USP <2040>Finished-product testing
Documents gastric resistance and intestinal-phase disintegration.
Veriphase™Lot-specific verification
Connects the bottle lot to available results, methods, dates, and source records.
Formula Transparency
Know what one capsule provides.
A clearly stated one-capsule serving makes the activity specification easier to understand and compare.
Important: Consult a healthcare professional before use, especially if pregnant or nursing, taking blood-thinning medication, or scheduled for surgery.
Supplement Facts
Serving Size 1 Capsule · Servings Per Container 90
Serrapeptase
(Serratiopeptidase enzyme)130 mg
250,000 SPU
(Serratiopeptidase enzyme)130 mg
250,000 SPU
Daily ValueNot established
Delivery: Bilamex™ Dual-Phase Delivery
Choose Your Supply
Choose the amount that fits you.
Current pricing is shown automatically—without countdown timers or manufactured scarcity.
1 Bottle
$ 74.95
$ 74.95 / bottle
Multi-Bottle Value
3 Bottles
$ 176.85
$ 58.95 / bottle
Save $ 48.00 vs. 3 singles
Extended Supply
6 Bottles
$ 341.70
$ 56.95 / bottle
Save $ 108.00 vs. 6 singles
Prefer recurring delivery? Save 16% ($ 12.00)
Deliver every month, 16.01% off for $ 62.95. Skip, reschedule, or cancel according to your subscription settings.
Bilamex™ Dual-Phase Delivery
Two physical stages of delayed-release protection.
Bilamex™ combines a delayed-release capsule with coated enzyme-containing particles. The delivery architecture is described separately from finished-product testing so you can distinguish what is built from what was measured.
Stage 1 · Delayed-release capsuleOuter delayed-release protection through the gastric phase.
Stage 2 · Coated particlesA second physical protective layer around the enzyme-containing material.
Finished-Product Delivery Performance · Lot 6798
USP <2040> DISINTEGRATION TESTING
Gastric PhaseNo disintegration through 60 minutes.
Intestinal PhaseComplete disintegration at 37 minutes.
Lot 6798 finished-dosage-form disintegration observation under USP <2040>. These lot-specific results do not represent a clinical outcome and should not be generalized to every production lot.
Veriphase™ Lot Verification
See what verification actually looks like.
Instead of relying on a generic “tested” badge, Veriphase™ gives buyers lot-specific access to the available verification record.
VERIFY THE LOT ON YOUR BOTTLERecent Veriphase™ Record · Production Lot 6798Tested 2026-08-05
Measured Activity292,327 SPU
Declared Specification≥ 250,000 SPU/capsule
IdentityConfirmed
Heavy MetalsPass
Microbial LimitsPass
DisintegrationPass · USP <2040>
LaboratoryIndependent ISO 17025-accredited laboratory
Activity MethodUSP proteolytic assay
Production lots change. Use the lot number printed on your bottle for the applicable record and supporting documentation when available.
Published Research Context
Research should be inspectable, too.
Published serrapeptase research is presented as scientific context alongside iSerra’s product-specific specifications, delivery testing, and lot verification—not converted into a promised health outcome.
Read the underlying research, not a marketing summary alone.
Review the published literature and distinguish scientific findings from iSerra’s product-specific testing.
VIEW PUBLISHED RESEARCHQuestions Before You Order?
The details that matter before checkout.
What does 250,000 SPU mean?
SPU stands for Serrapeptase Units, a measure of serrapeptase enzyme activity. iSerra is declared at 250,000 SPU per capsule in a one-capsule serving.
What is Bilamex™ Dual-Phase Delivery?
Bilamex™ describes iSerra’s two-stage delayed-release architecture: a delayed-release capsule surrounding coated enzyme-containing particles.
What does USP <2040> testing tell me?
It is finished-product disintegration testing used here to document gastric-phase resistance and intestinal-phase disintegration of the dosage form. It is not a clinical efficacy study.
How can I verify the testing for my bottle?
Use the production lot printed on your bottle at the Verify Your Lot page.
How many capsules and servings are in a bottle?
Each bottle contains 90 capsules. The Supplement Facts serving size is 1 capsule, giving 90 one-capsule servings per bottle.
What is the return policy?
iSerra purchases are backed by a 30-day money-back guarantee. See the Refund Policy for complete terms.
iSerra® Serrapeptase
Choose serrapeptase with more behind the label.
250,000 SPU activity. Bilamex™ Dual-Phase Delivery. Finished-product testing. Veriphase™ lot verification.
$ 74.95
One-time purchase · 1 bottle · 90 capsulesFree U.S. shipping · 30-day money-back guarantee. Product return required; customer-paid return shipping generally applies. Refund Policy.