

🦠 Elevate your gut game — because your microbiome deserves the best!
Natural Factors Ultimate Probiotic Critical Care delivers a potent 55 billion CFU from 9 gastric-resistant strains, expertly formulated to restore intestinal balance, support immune function, and ease digestive discomfort. Independently tested for purity and free from GMOs, this supplement is your go-to for acute probiotic support and enhanced nutrient absorption.
















| ASIN | B00IB14VBO |
| Best Sellers Rank | #178,895 in Health & Household ( See Top 100 in Health & Household ) #679 in Acidophilus Nutritional Supplements |
| Customer Reviews | 4.5 4.5 out of 5 stars (99) |
| Date First Available | February 7, 2014 |
| Department | All Ages, Unisex |
| Is Discontinued By Manufacturer | No |
| Item model number | 1817U |
| Manufacturer | Natural Factors |
| Product Dimensions | 2.21 x 2.21 x 3.85 inches; 1.44 ounces |
A**R
It was recommended to me by a digestive specialist.
Quality product.
G**E
It works
One of the most noticeable positive probiotic results I have experienced in just a few times using it.
S**F
Highly recommend
Excellent, clinical research-backed flora variety and those included happen to be those that performed the best for bringing a gut into alignment. - Perfect for someone with IBS. It helps me more than 4 Rx I've tried. Also great for anyone that wants to reseed their gut flora. - Easy to swallow - Can store at room temperature - Can be taken with or without foods - No adverse reactions
C**S
Cultured very fast
I did the "milk test" on it, turned to yogurt consistency in 8 hours. Way better than the Garden Of Life brand that I got prior. Of course it helped that this one was 100 billion live cultures and the other brand was 15 billion.
W**F
Not sure how to rate this other than Mid.
Guess you gotta be consistent with these..not just use up the whole box as advised but maybe make this an every month routine. I don't think I'm that patient enough. If I don't notice anything different after 30 days, I'm on to the next.
S**I
Wonderful probiotic!
I am a long-time fan of Natural Factors products. Due to mast cell activation, I am super-sensitive to almost everything, but Natural Factors products generally work for me. I highly recommend this product for anyone with MCAS or histamine intolerance. It contains probiotics that support DAO and histamine clearance while leaving out the probiotics that create histamine in the gut. After trying more kinds than I care to count, including some that required a Rx, this one makes me feel great. My kids and I started with the 55 billion capsules and worked our way up to the 100 billion.
E**T
Works well, great value
Treatment for stomach upset caused by traveling
P**S
Price and Quality
Great product
A**R
We switch between this product and use it every other month for our adult autistic son and it works in helping him self-regulate and have a better life in general. So we are very thankful for this product.
S**L
My Naturopath ordered this for me, to correct my health problems. Naturopaths are the experts so I am taking it. It's very powerful so I won't take it for a long time.
M**N
I'd recently needed antibiotics, and taking this higher level of probiotics was very helpful to me.
M**Y
This is my first time trying probiotic. I always have stomach issues and i can definetly see the diffrence how my gut is much stronger and it impacts my life for the better.
L**N
Seems to be good but still early days, only had product a few days
Trustpilot
2 weeks ago
2 days ago