Deep Immune Review

Deep Immune Review: Does It Really Work?

Written By : David J. Grossklaus   ✓ Fact Checked

Probiotics are considered the key to gut, mental, and immune health. Read our Deep Immune review to see if it’s really the best immune-boosting probiotic.

(Last Updated on November 1, 2022)

Probiotics offer more than a settled tummy.

They can be the answer to a weak immune system and a weapon for fighting against the dreaded flu season.

Our busy lives, demanding schedules, increased stress levels, and a certain virus all put our immune systems under great strain.

If you’re on a mission to bolster your immunity, nourish your digestive system, and boost your energy levels, a high-quality supplement for boosting your immune system is a fantastic start.

There are many probiotics on the market, some better than others.

We’re taking a deep dive into Deep Immune by Dr. Tobias, a pro and prebiotic blend designed especially for improving the immune system.

Our Deep Immune review discusses the probiotic strains, side-effects, customer experiences, pros, cons, and a final verdict.

Is Deep Immune your new go-to probiotic for a healthy immune system?

Let’s find the answer.

What Is Deep Immune?

Deep Immune bottle

Deep Immune by Dr. Tobias is a probiotic supplement (with prebiotics).

The probiotic strains used in Deep Immune have been chosen for their resilience to stomach acids and heat in your system.

Deep Immune uses spore-forming probiotics for their resilience (sometimes even to antibiotics) and the ability to effectively populate your gut with “good guys”.

About Dr. Tobias

Canadian-based brand Dr. Tobias began in 2013, (in Germany) and started out selling Omega 3 Fish Oil supplements before expanding their offerings.

All of their products are made in the USA, in FDA-approved facilities.

Dr. Tobias is a brand belonging to the umbrella company Mimi’s Rock.

Deep Immune Ingredients

Deep Immune ingredients

PreForPro (registered) 15 mg:

(Prebiotic formula)

  • LH01 Myoviridae.
  • LL5 Siphoviridae.
  • T4D Myoviridae.
  • LL12 Myoviridae.

Probiotic Bacteria 4.4 billion CFU (27 mg):

  • DE111 Bacillus subtilis: spore-forming probiotic that is also an antioxidant (fights free radicals). Plus, it may trigger immune responses in the body for effective pathogen fighting 1.
  • Bacillus coagulans: a probiotic that is resilient against harsh stomach acids 2.
  • Lactobacillus acidophilus: a probiotic that produces lactic acid. Also, it may ease reduce cold symptoms 3.
  • Bifidobacterium lactis: a probiotic that increases T-cell (immune cells) activity 4.

Another ingredient in Deep Immune has garnered criticism from customers, and it’s called maltodextrin.

Maltodextrin is a controversial ingredient because it’s said to inhibit good bacteria growth in the gut (ironically!).

Dr. Tobias addresses this in their FAQs section stating:

“The Maltodextrin in Dr. Tobias Deep Immune Probiotics is derived from non-GMO corn or tapioca, and is used only on an as-needed basis as a filler for the capsule.”

Interestingly, however, maltodextrin is considered a prebiotic 5 for some strands of probiotics.

How Does Deep Immune Work?

  • PreForPro formula contains phages that cling to and kill bad bacteria, making room for healthy bacteria (probiotics) to thrive in the gut.
  • Prebiotics act as sustenance for the probiotics to multiply.
  • Bacillus subtilis acts as an antioxidant, killing harmful free radicals.
  • Bifidobacterium lactis boosts the effectiveness of T-cells (immune cells).

Deep Immune Benefits

  • Designed especially for the immune system.
  • May survive against antibiotics.
  • Resilient against stomach heat and acids.
  • Does not require refrigeration.

How To Use Deep Immune?

Take 2 capsules each day, with water.

Deep Immune Side Effects

The reality is, people who aren’t used to taking probiotics can sometimes experience bloating and stomach pains, no matter the brand or strain.

Deep Immune has several negative reviews by customers who experienced painful side-effects such as:

  • Gas.
  • Stomach pain.
  • Diarrhea.
  • Constipation.
  • Nausea.
  • Lack of energy.

For example:

“Had a VERY bad reaction to this. To keep it simple Painful Gas, Discomfort, PAIN! I went to the ER! I missed work!! I didn’t make the connection until I stopped due to pain because I thought I was sick, once I felt better I started taking this again and very quickly had the SAME pain and bloating. I’m done. I never had this reaction with other probiotics.”

“Junk. Caused me to have severe constipation. Had to go to the doctor.”

“I started taking this probiotic 10 days ago and since then I have been sick. It gave me diarrhea and I have nausea most of the day. I just feel tired and lack energy. I should have stopped taking it right away and I regret sticking with it for this long. Please if you decide to take this supplement and feel ill after the first dose, do NOT continue, just find a different probiotic.”

Note that these symptoms might be more due to the prebiotic formula in Deep Immune than the probiotic formula, as prebiotics are associated with similar side-effects.

Is Deep Immune FDA-Approved?

No, because dietary supplements are not approved by the FDA.

However, Deep Immune is made in FDA-registered facilities.

Is Deep Immune A Scam?


We’re confident that you won’t be giving your money to a scam or “snake oil” if you choose to try Deep Immune.

For one, there are many very positive reviews stating great improvement in digestive issues.

Secondly, the ingredients are well backed by research, and thirdly, we didn’t come across any lawsuits or troubling information regarding Dr. Tobias or Mimi’s Rock Corp.

Does Deep Immune Pass “The Milk Test”?

The biggest risk when buying probiotics is that the strains used are not effective, alive, or as strong as the label promises.

The “milk test” is when probiotics are mixed with milk and left for a while to see if cultures form and grow.

A proactive customer tried the milk test with positive results:

“This one passed the milk test with flying colors.”

While we can’t rely on a customer review that isn’t from a reputed medical or scientific source, it’s worth noting.

Deep Immune Reviews & Complaints

Deep Immune pills

While the majority of Deep Immune reviews on Amazon are very positive (with over 6500 reviews in total), 1 and 2-star reviews describe unpleasant side-effects.

For example:

“If you want to have the runs then this is it! First I thought it was just me but since they gave me a free bottle I thought I would share it with my mom Lord have mercy I feel sick to my stomach for even doing that because now I got me the runs and I gave my poor mom the runs as well I don’t know what they have been the stuff but it has to be a laxative”.

However, other reviews in the 4 and 5-star sections rave about greatly improved symptoms.

For example:

“Greatly helped my Candida gut. My rashes on my shins finally cleared up. I thought it was psoriasis but turned out to be a yeast infection due to too much candida bacteria in my guts”.

“Although it took a few days to notice a difference, I now feel less bloated, less gassy, and my desire for sweets has greatly diminished. That being said, I have lost 5 pounds and my psoriasis has calmed. At this time I am well pleased with this product”.

Deep Immune: Packages, Prices & Where To Buy It

You can purchase Deep Immune from Amazon, for a very fair price of $22.47 per bottle (each bottle contains 60 capsules/30-day supply). You can also get them from the Dr. Tobias official website for $22.45 per bottle. Dr. Tobias has a “buy more, save more” deal, meaning that when you buy 2 bottles you save 10%, buy 3 and save 15%, and buy 4 and save 25%.

Money Back Guarantee

Dr. Tobias doesn’t offer a refund policy or money-back guarantee as far as we can tell.

Their site simply states to email their team at support@drtobias if you want to sort out a return, but they don’t elaborate on refund terms and conditions.

See below how the official site looks like.

Deep Immune official website

Deep Immune Pros & Cons


  • No refrigeration needed.
  • Strong formula.
  • Affordable.


  • Contains maltodextrin.
  • No money-back guarantee.
  • Many reported side effects.

Deep Immune Review: Final Verdict

Deep Immune pill

If the thousands of excellent reviews are to be believed, Deep Immune by Dr. Tobias could be the answer to better digestive and overall health.

The decent CFU-count, no-refrigeration formula, and resilient strains get top marks, but the reports of nasty side-effects are also to be taken into consideration.

The price per bottle is very reasonable, so giving it a 30-day try won’t break the bank, and it could reap great rewards.

However, be clear on the refund policy (or lack thereof) before buying to avoid any irksome situations should you want to send it back.

Because different strains of probiotics are best suited to different health concerns, it’s best to check with your doctor before taking Deep Immune.

We laid out the facts, will you buy Deep Immune? Comment below and tell us what you think!

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