Purina Pro Plan Vet FortiFlora PRO Synbiotic Action vs Nutramax Proviable (Capsule, 80 ct)

FortiFlora PRO Synbiotic Action exists partly to answer products like Proviable-DC: Purina added psyllium husk fiber to its single-strain formula so it could compete with multi-strain synbiotic blends, by the company's own comparison materials. The clearest label difference is organism count versus research history. Proviable-DC carries seven named strains across four genera but shows zero canine studies in this data, while FortiFlora PRO Synbiotic has just one strain, Enterococcus faecium SF68, with five canine trials behind it.

photoPurina Pro Plan VetPurina Pro Plan Veterinary Supplements FortiFlora PRO Synbiotic Action CaninePowder packet · 30 ct · Shelf-stable
vs
photoNutramaxNutramax Proviable-DC CapsulesCapsule · 80 ct · Shelf-stable

Which one, for what

A vet or owner who wants published canine research behind the specific strain being givenPurina Pro Plan Vet FortiFlora PRO Synbiotic ActionFortiFlora PRO Synbiotic Action's single strain has five canine RCTs and six total canine studies in this data. Proviable-DC's seven-strain blend shows zero canine studies.
An owner who wants broader strain diversity across multiple bacterial genera, for example after a course of antibioticsNutramax Proviable (Capsule, 80 ct)Proviable-DC names seven distinct strains spanning Enterococcus, Bifidobacterium, Streptococcus, and three Lactobacillus species. FortiFlora PRO Synbiotic Action has only the one E. faecium strain.
An owner who wants to buy directly through AmazonNutramax Proviable (Capsule, 80 ct)Proviable-DC has an Amazon ASIN (B001O3UE9E) in our data. FortiFlora PRO Synbiotic Action doesn't show one, suggesting it's sourced mainly through veterinary channels.

Not veterinary advice. Each claim above is backed by the label row or study linked in the full table below.

Label, line by line

Green tint = the stronger value on that row, by the rule below
FieldPurina Pro Plan Vet FortiFlora PRO Synbiotic ActionNutramax Proviable (Capsule, 80 ct)
OrganismsEnterococcus faecium SF68 (NCIMB 10415)Enterococcus faecium NCIMB 30183, Bifidobacterium bifidum NCIMB 30179, Streptococcus thermophilus NCIMB 30189, Lactobacillus helveticus NCIMB 30184, Lactobacillus delbrueckii NCIMB 30186, Lactobacillus casei NCIMB 30188, Lactobacillus plantarum NCIMB 30187
Strain-numbered1 of 17 of 7
CFU per daily dose100 million5 billion
CFU guaranteeunstatedunstated
PrebioticPsyllium huskFructooligosaccharide
FormPowder packetCapsule
Dose by weight1 packet any weight1 capsule any weight
StorageShelf-stableShelf-stable
Canine studies (by strain)5 RCTs0 found
Label verified2026-10-122026-10-12

Stronger value rule: more strain-named organisms, CFU guaranteed through expiry over at-manufacture, and more canine RCTs each count as stronger. Raw CFU count alone never does.

Nutramax Proviable (Capsule, 80 ct) on Amazon Prices are on Amazon. We earn a commission; it doesn't change the table.

What owners report

Tagged from public posts mentioning either product. Counts, not opinions.

  • switched a to b (n=1)
  • no effect (n=1)
  • dosage question (n=1)
  • price (n=1)
  • used with antibiotics (n=1)

Asked about this pair

Can you give FortiFlora PRO Synbiotic Action and Proviable-DC together?

We didn't find a study on combining them. Both contain an Enterococcus faecium strain (SF68 in FortiFlora PRO, NCIMB 30183 in Proviable-DC), so giving both at once could mean doubling up on a similar organism rather than adding anything new. Check with your vet before stacking them.

Proviable-DC lists 5 billion CFU against FortiFlora PRO Synbiotic Action's 100 million. Does the bigger number make it the better choice?

Not by itself. Neither label states whether that CFU figure is guaranteed through expiry or only at manufacture. What's actually documented differently is canine research: FortiFlora PRO Synbiotic Action's strain has five RCTs behind its labeled dose, while Proviable-DC's seven-strain blend has none in this data.

Which one is cheaper or easier to find on Amazon?

Proviable-DC has an Amazon ASIN (B001O3UE9E) in our data. FortiFlora PRO Synbiotic Action doesn't, so it likely needs to be picked up through a vet's office rather than Amazon. We don't have pricing data to compare cost directly.