Fiber, probiotics & enzymes
Serrapeptase
An enzyme first found in bacteria living in silkworms. Taken for the airways and joints – good studies in people are missing.
47 products from US online stores, sorted by what one serving costs – as the label defines it, not by the price per pack.
9.3¢Lowest cost
per serving
- Prices checked Nov 1, 2026, US
- No paid placements
Why per serving?
These products don’t share one ingredient amount we could compare by – many are mixes, others list units like FCC. So we compare the price of one serving as the label defines it. A serving can be 1 tablet or 4 capsules and hold more or less – check the label before you buy.
30–180servings per pack in most of the products we checked
Where products miss quality points
How the 47 products score
- Very good 90+: 2
- Good 75+: 45
- Fair 60+: 0
- Low under 60: 0
- have no seal from an independent testing program
- 96%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 5 whose label says “third-party tested”
The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.
We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works
Pack size
Compare packs of a similar size.
All sizes in one list can affect the results – big packs usually cost less per serving. Pick a size above to compare packs that are alike.
47 products · cheapest per serving first
- Rank 1
Amazing Nutrition
Amazing Formulas Serrapeptase Delayed Release 40000 IU
Capsules
85Good qualityMade in USA9.3¢per serving
Lowest
- Pack
- $24.99270 capsules
- One serving
- 1 capsule
- Pack lasts
- 270 daysif you take 1 capsule a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
Best Naturals
Serrapeptase 40000 SPUs
Capsules
80Good qualityMade in USA9.4¢per serving
2% more
- Pack
- $16.99180 capsules
- One serving
- 1 capsule
- Pack lasts
- 180 daysif you take 1 capsule a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Best Naturals
Serrapeptase 40000 SPUs
Capsules
80Good qualityMade in USA$0.10per serving
8% more
- Pack
- $8.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Amazing Nutrition
Amazing Formulas Serrapeptase - 40000 IU
Capsules
80Good qualityMade in USA$0.11per serving
20% more
- Pack
- $9.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
Nutricost
Serrapeptase, 20 mg (40,000 SPU)
Capsules
85Good qualityMade in USA$0.12per serving
26% more
- Pack
- $13.95120 capsules
- One serving
- 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
Nutricost
Serrapeptase
Capsules
80Good qualityCountry not stated$0.13per serving
44% more
- Pack
- $15.97120 capsules
- One serving
- 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
Nutricost
Serrapeptase, 60 mg (120,000 SPU)
Capsules
85Good qualityMade in USA$0.15per serving
62% more
- Pack
- $17.95120 capsules
- One serving
- 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
California Gold Nutrition
Serrapeptase, Proteolytic Enzyme, 40,000 SPUs
Capsules · 2 flavors: 120,000 SPUs, 40,000 SPUs
80Good qualityCountry not stated$0.16per serving
77% more
- Pack
- $29.44180 capsules
- One serving
- 1 capsule
- Pack lasts
- 180 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Swanson Vitamins
Double Strength Serrazimes - 40,000 Units
Capsules
80Good qualityCountry not stated$0.18per serving
92% more
- Pack
- $10.6960 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
swansonvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
Vitacost
Serrapeptase Enzyme
Capsules
80Good qualityCountry not stated$0.20per serving
112% more
- Pack
- $11.7560 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
Doctor's Best
Serrapeptase
Capsules
80Good qualityCountry not stated$0.20per serving
116% more
- Pack
- $17.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
Doctor's Best
Serrapeptase 40,000 SPU
Capsules
80Good qualityCountry not stated$0.20per serving
116% more
- Pack
- $17.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
drbvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
Sunergetic
Serrapeptase
Capsules
80Good qualityCountry not stated$0.21per serving
127% more
- Pack
- $18.9590 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
Sunergetic
Premium Serrapeptase Enzyme Supplement
Capsules
80Good qualityCountry not stated$0.21per serving
127% more
- Pack
- $18.9590 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
sunergeticproducts.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
Amazing Nutrition
Amazing Formulas Serrapeptase - 120,000 IU
Capsules
80Good qualityMade in USA$0.22per serving
140% more
- Pack
- $59.98270 capsules
- One serving
- 1 capsule
- Pack lasts
- 270 daysif you take 1 capsule a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Solaray
Serrapeptase, 10 mg
Capsules
80Good qualityCountry not stated$0.23per serving
145% more
- Pack
- $20.3990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
Vitamatic
Serrapeptase
Capsules
80Good qualityCountry not stated$0.25per serving
170% more
- Pack
- $14.99120 capsules60 servings
- One serving
- 2 capsules
- Pack lasts
- 60 daysif you take 2 capsules a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
Vitamatic
Serrapeptase
Capsules
80Good qualityCountry not stated$0.25per serving
170% more
- Pack
- $14.99120 capsules60 servings
- One serving
- 2 capsules
- Pack lasts
- 60 daysif you take 2 capsules a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
KAL
Serrapeptase, 20 mg
Tablets
80Good qualityCountry not stated$0.25per serving
172% more
- Pack
- $22.6990 tablets
- One serving
- 1 tablet
- Pack lasts
- 90 daysif you take 1 tablet a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
NOW Foods
Serrapeptase
Capsules
80Good qualityMade in USA$0.27per serving
186% more
- Pack
- $15.9160 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Amazing Nutrition
Amazing Formulas Serrapeptase - 120,000 IU
Capsules
80Good qualityMade in USA$0.28per serving
200% more
- Pack
- $24.9890 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Doctor's Best
Natto-Serra
Capsules
80Good qualityCountry not stated$0.30per serving
224% more
- Pack
- $26.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 23
Doctor's Best
Natto-Serra
Capsules
80Good qualityCountry not stated$0.30per serving
224% more
- Pack
- $26.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
drbvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 24
Doctor's Best
High Potency Serrapeptase, 120,000 SPU
Capsules
80Good qualityCountry not stated$0.31per serving
234% more
- Pack
- $83.42270 capsules
- One serving
- 1 capsule
- Pack lasts
- 270 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 25
Dr. Murray's
Serrapeptase, 125,000 SPU
Capsules
85Good qualityCountry not stated$0.31per serving
240% more
- Pack
- $18.8960 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 26
Double Wood Supplements
Serrapeptase
Capsules
80Good qualityCountry not stated$0.33per serving
259% more
- Pack
- $19.95120 capsules60 servings
- One serving
- 2 capsules
- Pack lasts
- 60 daysif you take 2 capsules a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 27
Double Wood Supplements
Serrapeptase Supplement
Capsules
80Good qualityCountry not stated$0.33per serving
259% more
- Pack
- $19.95120 capsules60 servings
- One serving
- 2 capsules
- Pack lasts
- 60 daysif you take 2 capsules a day
doublewoodsupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 28
Doctor's Best
High Potency Serrapeptase
Capsules
80Good qualityCountry not stated$0.34per serving
272% more
- Pack
- $30.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 29
Doctor's Best
High Potency Serrapeptase 120,000 SPU
Capsules
80Good qualityCountry not stated$0.34per serving
272% more
- Pack
- $30.9990 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
drbvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 30
Enzymedica
SerraGold, High Potency Serrapeptase
Capsules
98Very good qualityMade in USA$0.37per serving
300% more
- Pack
- $44.44120 capsules
- One serving
- 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 31
Protocol for Life Balance
Serrapeptase, 33 mg
Capsules
80Good qualityCountry not stated$0.42per serving
350% more
- Pack
- $25.0060 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 32
Dr. Murray's
Serrapeptase, 125,000 SPU
Capsules
85Good qualityCountry not stated$0.42per serving
353% more
- Pack
- $12.5930 capsules
- One serving
- 1 capsule
- Pack lasts
- 30 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 33
Enzymedica
SerraGold, High Potency Serrapeptase
Capsules
78Good qualityMade in USA$0.42per serving
359% more
- Pack
- $25.4960 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 34
Carlson
Serrapeptase, Delayed Release, 120,000 SPUs
Capsules
80Good qualityCountry not stated$0.49per serving
431% more
- Pack
- $44.2090 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 35
Enzymedica
SerraGold
Capsules
100Very good qualityMade in USA$0.49per serving
433% more
- Pack
- $59.25120 capsules
- One serving
- 1 capsule
- Pack lasts
- 120 daysif you take 1 capsule a day
enzymedica.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 36
Carlson
Serrapeptase, Delayed Release, 120,000 SPUs
Capsules
80Good qualityCountry not stated$0.53per serving
473% more
- Pack
- $15.9030 capsules
- One serving
- 1 capsule
- Pack lasts
- 30 daysif you take 1 capsule a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 37
Source Naturals
Serrapeptase
Capsules
80Good qualityCountry not stated$0.55per serving
492% more
- Pack
- $32.85120 capsules60 servings
- One serving
- 2 capsules
- Pack lasts
- 60 daysif you take 2 capsules a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 38
Enzymedica
SerraGold
Capsules
80Good qualityMade in USA$0.57per serving
512% more
- Pack
- $33.9960 capsules
- One serving
- 1 capsule
- Pack lasts
- 60 daysif you take 1 capsule a day
enzymedica.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 39
Source Naturals
Serrapeptase
Capsules
80Good qualityCountry not stated$0.57per serving
516% more
- Pack
- $17.1160 capsules30 servings
- One serving
- 2 capsules
- Pack lasts
- 30 daysif you take 2 capsules a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 40
Carlson
Serrapeptase
Capsules
80Good qualityCountry not stated$0.58per serving
524% more
- Pack
- $52.0090 capsules
- One serving
- 1 capsule
- Pack lasts
- 90 daysif you take 1 capsule a day
carlsonlabs.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 1,556%more per serving for the most expensive product than for the cheapest.
- Fact
- 172%more per serving for the cheapest tablets than for the cheapest capsules.
How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check
The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.
How we calculate
Cost per serving = price ÷ servings in the pack, with the serving as the label defines it.
Found a mistake or a product we should add? Email us