gut imbalance
Disrupted bacteria can push the immune system into overreacting.
Biolgical Leaky Gut Protocol
Biolgical Leaky Gut Protocol
One formula targeting the gut-skin cycle in a single delicious chew
- Breaks the itch cycle at the root cause
- Restores gut balance and microbiome health
- Supports a calmer immune response
- Promotes healthy digestion and stool quality
Choose Quantity:
As a subscriber you're getting our lowest price
Couldn't load pickup availability
try for 30-days risk free
daily serving guide
why dogs love it
Savory beef, chicken, salmon, & peanut butter dogs naturally crave in a soft chew they’ll love like a treat every time
why it keeps happening
the gut–skin
connection
Itching often starts deeper than the surface.
reactive loop
Inflammation keeps the gut off balance, which keeps the skin reactive.
restore balance
Probiotics and omega-3s help calm the internal trigger.
calmer skin
Support the inside first, then the skin has room to settle.
what’s inside every serving
95mg
fish oil
calms the inflammatory response in skin tissue
patented 500M CFU
probiotics (3 strains)
restores gut balance, the root cause
1000IU + 10mg
Vit A + CoQ10
strengthens skin barrier as the gut heals
200mg + 100 mg
glucosamine + MSM
joint support, works alongside skin recovery
50mg
quercetin dihydrate
stopping the itch at the source by blocking histamine release
secondary benefits
more than skin support
Built to calm the itch cycle first, while supporting the systems that affect how a dog feels day to day.
digestion
Supports a healthier gut environment and more consistent stool quality.
joint comfort
Added support for mobility, cartilage, and everyday movement.
immune balance
Helps support the body when it has been stuck in a reactive state.
skin barrier
Nutritional support that helps the skin stay stronger and calmer.
the 90-day routine
Steady changes, not overnight ones.
W1Week 1
Stool starts to firm up and become more consistent, often the first sign the gut is stabilizing internally.
W3Week 3
Scratching and licking begin to ease. The coat feels slightly softer, and your dog seems more comfortable day to day.
W6Week 6
The first real visible shift. Coat looks fuller and healthier, with less irritation and dryness overall.
W12Week 12
Skin stays calmer with fewer flare-ups. Results feel more stable and easier to maintain long term.
No noticeable improvement by day 30? Full refund. No questions asked.
Real Results From Real Dog Parents
Some testimonials are from customers who received free product or compensation in exchange for their review.
What Dog Parents Are Saying
20,000+ Dogs Served
CD
Jun 17, 2026Chocco, my beautiful Desert Dog, has his life back
My dog had so many skin issues before starting Biolgical. Hundreds of dollars worth of vet bills which was very discouraging. Finally found Biolgical after doing tons of research. We have now safely weened him off the meds and he is solely on Biolgical for two months. His gut health really improved and he is his old self. Thanks Biolgical. We are truly grateful 🙏
ME
Jul 26, 2026The supplements have really helped my dog
The supplements have really helped my dog's itchy ears! And she loves the taste. She can't wait for "vitamin time". 🙂
NI
Jul 18, 2026A multivitamin that actually works.
Shady appears to have elevated her energy levels and her mobility since starting this about two months ago... now that she's 13 years old, she was losing that playful edge but it seems like the multivitamin is actually helping her.
MD
Jul 6, 2026The product always arrives on time
The product always arrives on time, and my dog loves it! Her fur is much better, and she doesn't try to eat grass anymore when we walk outdoors.
LA
Jun 30, 2026So far so good
So far so good. Started with the vitamins for my three pups, less itching for the Havanese after two weeks and better movement for the 15 y/o Doberman. Will buy again!
DL
Jun 19, 2026Fantastic company, amazing products
Not only are the products of a fantastic quality, but the team behind it have amazing customer service and fantastic communication. You feel like you are dealing with real people who actually care. I could not recommend them more highly, hence the five stars.
ME
May 25, 2026I was skeptical, but can see visible difference in mobility
My dogs love the multivitamins and my older dog who is 13 has noticeably got more energy and climbs the stairs with less stiffness. I will definitely keep buying these for her.
MI
Jun 9, 2026My Frenchie's itching stopped completely
He has been prone to itching, especially in his ears. After day one we saw a difference and by day 3 the itching has stopped completely. I am so impressed! My Frenchie is also quite fussy and won't eat the tablets directly so I break them up and mix them into his food. No problem at all.
These reviews are for informational purposes only. The information is not a substitute for expert veterinary care. Reviews are written by actual customers and represent their own observations. These observations are not guaranteed, are not medically substantiated, and may not be typical for other pets. When necessary, reviews will be replied to privately.
why this formula specifically
built differently, on purpose
✓
inside-first
Built around the gut–skin connection, not just surface relief.
✓
more than one job
Supports digestion, skin, joints, and immune balance in one daily routine.
✓
made for consistency
Designed to be used daily, because real change comes from staying with it.
simple daily serving
Serve each morning with food or just as a stand-alone treat.
small dogs
0–25 lbs = 1 chew
medium dogs
25–75 lbs = 2 chews
large dogs
75+ lbs = 3 chews
Each jar contains 30 chews.
give it 30 days, or get your money back
If the itching hasn't slowed down and the gut hasn't improved by day 30, we'll refund you. No questions.
real owner feedback
what people start noticing
★★★★★
“Tried 4 different shampoos before this. Nothing worked long term. 3 weeks in and the scratching is already way less constant.”
★★★★★
“Vet kept saying allergies but couldn't tell us why. This is the first thing that's actually made a difference in her skin”
★★★★★
“The licking and chewing at her paws was driving us both crazy. Week 4 and it's noticeably calmer. Coat looks better too”