Updated: 07/11/2017 - Site sponsored by Dietspotlight Burn

Acidophilus Review- Does This Bacteria Really Work?

  • 18 User Comments
  • Rating: 3.7. From 32 votes.
By Summer Banks Jun 08, 2017

Why are people talking about Acidophilus? We examined the ingredients, side effects, research, and customer-service quality to create this comprehensive review. We additionally scrutinized various user comments from all over the internet. Finally, we narrowed down all of the data we collected to give you the facts.

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What is Acidophilus?

First thing, Acidophilus is a naturally occurring bacteria found in the gastrointestinal tract of humans. A variety of medical conditions as well as the use of antibiotics can change the levels in the stomach and intestines and cause various symptoms. [1]

Acidophilus is made by many different companies and sold as a probiotic. They have traditionally been marketed to help restore the microbiome to an optimal state and relieve gastrointestinal discomfort. [2]
However, recent research has indicated a potential link between bacteria levels in the stomach and intestines and obesity levels. Some of the research is promising, but read on…

Sources!– “Is it Better From Food?”

The first concern is that most of the testing that has been completed used live bacteria derived from food rather than that used in supplement. According to our Research Editor, “There has been promising testing completed linking weight-loss and bacteria levels in the microbiome. However, more is needed with specific supplements to prove efficacy.” [3]

According to one dieter, “I didn’t lose any weight when I used Acidophilus supplements. I didn’t notice anything at all.”

Another user commented, “I was told probiotics could help me lose weight but it didn’t work.”

However, there were some users who were hopeful about the efficacy of the supplements. “My doctor told me to eat yogurt with live bacteria in it but that’s gross so I tried these instead. Maybe it will work the same.”

Other users had more positive experiences, “I felt less bloated almost immediately.”

”I feel like my cravings are better now, so I think it’s helping,” said another.

Acidophilus Side Effects– “Are They Worth It?”

Maintaining optimal bacteria levels in the intestines is important for good digestive health. Some consumers find that they have more issues when that balance is upset. [4]

One unhappy consumer said, “A day after I started taking these I had the worst gas ever. I couldn’t keep using them.”

Another dieter claimed, “I broke out into hives on day two and had to give up.”

Others had a more positive experience, “My stomach was a little upset at first but after a few days I felt much better and I ended up losing a few pounds.”

Some were quite happy with their experience, “I’d been super constipated before taking these and now everything is flowing again. I even lost some weight.”

Another happy customer said, “It worked fine without any side effects.”

According to our research, things like unsubstantiated claims and side effects can really make a lasting impression on consumers. Details like this matter in one’s overall impression of a product and a company. If Acidophilus doesn’t work as claimed, a dieter will move on to something better.

The Science – “Is it a Weight-Loss Product?”

At DietSpotlight, we need to see proof before we are able to recommend a weight-loss supplement to our readers. The studies that have been done mostly indicate this bacterium helps promote a healthy digestive system. But that doesn’t make it an effective treatment to help you lose weight. [5]

The Bottom Line – Does Acidophilus Work?

Is it time to clear the shelves of Acidophilus? While there is certainly some promising research about it’s to promote a healthy gut microbiome which may lead to weight-loss in some individuals, that has only been tested with food products. No supplement companies have proven their product provides a similar benefit. We have reservations about giving the green light to promote weight-loss.

If the time has come to jumpstart your metabolism you may want to check out a product that has ingredients that have been shown to help support weight-loss. We believe a well-rounded product has a strong customer service focus, good value, and works as intended.

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Previous Acidophilus Review (Updated August 12, 2013):

Acidophilus - What You Should Know

Acidophilus is a type of naturally-occurring bacteria in the digestive system which is believed to help regulate digestion and prevent digestion-related issues such as diarrhea or constipation. Acidophilus also occurs naturally in bacteria-rich food such as yogurt, the Korean dish kimchee, and sauerkraut. Only recently has Acidophilus been recognized for its documented benefits due to an ad campaign by a yogurt company which has lead other companies, including diet companies, into making claims such as rapid weight loss with this ingredient. This ad campaign is essentially responsible for the development of the Acidophilus dietary supplement. Although you can buy this in health food stores, nutritionists recommend receiving it from a natural source for easy digestion, such as consuming Acidophilus-fortified yogurt or buying kimchee at an oriental market. Acidophilus is highly recognized as a good bacteria with numerous digestible benefits, but diet companies are now claiming it can help you lose weight. Although there is not sufficient evidence proving their claims, eating Acidophilus-rich products may actually benefit your diet.

Ingredients in Acidophilus

Acidophilus is a bacteria that naturally occurs in the body, but is also found in fermented food such as kimchee and sauerkraut. It is also an additive in yogurt.

Product Features of Acidophilus

Acidophilus plays an important role in the digestion system and is shown to act as a protective barrier against harmful bacteria, toxins, and other threats to the digestion system. It is also shown to help produce chemicals which aid in digestion. Acidophilus may be lacking in dieters and otherwise healthy people. For those suffering from digestion issues, Acidophilus is sometimes prescribed by a physician. There is plenty of evidence showing it does provide a substantial benefit, and better yet, it has no side effects. Recently, however, diet companies claimed it could make dieters lose weight quickly. While easing digestion may help regulate the body and prevent constipation and diarrhea, there has been no evidence showing that it can help dieters lose weight. It does play an important role in any healthy diet however, regardless if the person is dieting or not.


  • Is shown to help improve the digestion process.
  • Naturally occurs in most fermented food, such as kimchee and yogurt.


  • Is not shown to stimulate weight loss.
  • It is better to consume this bacteria in its natural form instead of taking a supplement.
  • Is only proven to decrease symptoms related to digestion such as diarrhea and constipation.

Conclusion About Acidophilus

Acidophilus may serve an important role in digestion, but there are no substantial dietary benefits with this bacteria itself. For dieters suffering from digestion-related issues however, it may lessen some of those issues, but it is best to speak with a physician before adding this bacteria to your normal diet.

Acidophilus Ingredients and Supplement Facts

Serving Size: 1/4 Teaspoon
Serving Per Container: 121
Amount per Serving% DV
Lactobacillus acidophilus2 Billion50%
Bifidobacterium lactis1.2 Billion30%
Bifidobacterium longum200 Million5%
Lactobacillus paraceseil sub-sp.200 Million5%
Streptococcus thermophilus200 Million5%
Lactobacillus bulgaricus200 Million5%

Other Ingredients: Maltodextrin and Silica.

Acidophilus Side Effects:

There’s a lot of talk about the “good” bacteria acidophilus, so in our review we concentrate on acidophilus side effects. (We invite you to read our full acidophilus review.) We’ll dial into clinical research and studies. We analyze consumer reviews and comments. We then condense the info to give you the bottom line.

What You Need to Know

Acidophilus is a bacteria found in the human body, often considered “good” bacteria. When it breaks down food, the result is the production of hydrogen peroxide and lactic acid. Typically, the compound is taken in capsule form once per day, resulting in support for overall health and wellness.

The compound, first discovered in the early 1900’s, is typically used to treat stomach and intestinal issues. You can purchase it in capsule form at local health stores and online retailers. One of the benefits is that it helps add “good” bacteria, but read on…

Bowel Troubles – “Not so Nice!”

The first concern noted about acidophilus side effects was bowel troubles. “You want to lose weight the right way,” said Research Editor. “Spending hours in pain is not the best way to do it.”

“I suffered the worst abdominal pain over a period of 12hrs. It was worse than the IBS. No bowel movement but unbelievable pain, sweats and nausea,” commented a user.

“They give me headaches and intense increased appetite…I am constipated and I get god awful pain in my stomach,” said a customer.

Stomach Issues – “Gas Anyone?”

Based on customer comments, acidophilus side effects include stomach issues. “Made my intestinal problems worse, cramps, dark explosive diarrhea overall sick to my stomach,” said a dieter.

“This medicine has caused me to have very bad gas. It caused me to become very constipated,” reported a user.

“After taking this I have more gas and abdominal discomfort and ran to the bathroom with loose stool more often,” commented another.

According to our extensive research, dietary supplements causing problems, like stomach issues, could reduce the chances of long-term success. If acidophilus affects dieters, there’s a call for concern.

The Science

There’s a wealth of information relating to the benefits of acidophilus, but we can’t recommend it because some of the reports are inconclusive or negative. According to the Virginia Polytechnic Institute and State University “Probiotics can be ineffective or even detrimental if not used at the optimal dosage for the appropriate purposes”. At DietSpotlight, finding published clinical research linking the compound to weight-loss is imperative. If there’s not a complete picture, we don’t buy in.

The Bottom Line

After careful consideration, we’ve come to a decision about acidophilus. We like that it helps add “good” bacteria to the body and that we found some positive customer comments, but can’t recommend it because there’s no conclusive research linking it to weight-loss. Plus, there are concerns about it causing bowel problems and stomach issues.

If you want to drop the weight, we recommend a supplement backed by published scientific research with reported side effects.

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Summer Banks Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Dietspotlight, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.7. From 32 votes.
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Acidophilus Review

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Leave a comment or review

  does acidophilus cause weight gain?
charlene dean

does acidophilus cause weight gain?

Maribel (Editor)

Hello Charlene. All users are different and can experience different weight-loss results.


Yes it causes rapid weight gain and once the pounds are packed they’re very hard to lose.


how does it make you gain weight where did you get your ionformation


I started taking acidophilus for my digestion problem and irregular bowel movements for about a year now, I’ve lost about 11 lbs..


Not everyone loses weight. Everyone is different. My husband and I have gained weight. We have always been thin. We have never gained weight until probiotics. Do your research…not everyone loses like you have.


I’m pretty sure this person is just trolling.


No kidding… I gained 7 lbs in one month!!! No more for me. Everyone is different. I suppose they work oppositely for some people. I have not changed a thing about my eating habits other than adding this. This is what it has to be. No doubt in my mind. The only thing that it did for me was make me regular and I had more gas than normal.

  It worked for me !
Tina (Verified User)

I can’t imagine it makes a person gain weight if you are dieting at the same time. It is suppose to be good for your gut. I know one thing, I had an inflamed stomach and it is now gone after I took audiophiles. I took the liquid kind from the health food store.

Stacey (Verified User)

i was the same. I started taking a supplement and I gained around 10lb which I have struggled to lose. Wish I had never bothered! Only thing I did different. I questioned I myself too but I agree with others, it is the culprit. Shame, ad I felt better on it. Just fatter!

  I did not recommend this
serena (Verified User)

Yes depending on the person – I do not have any bowel or digestion problems and added this to my diet to keep good things going but gained 10 in one month (note I exercise everyday and no increase in calorie intake) So I guess if you do not have gut or bowel issues and or if you are not on an antibiotic – I recommend you do not take. Now I have to double up my treadmill routine.

  Does this program help me?

Does this program help at all with copd, I have quit smnikog over a year ago. no other health problem really, except difficutly eating due to them messing my bite up a few years ago, tmj.Thank you, Penny.am not on o2 but on nebulizer treatments.

   I exercise plenty and eat healthy.

Had IBS pretty bad.Lost weight down to 160 (from 170).Took probiotics….cured the IBS but gained 20 lbs.Struggling to lose weight though I exercise plenty and eat healthy.May have to stop the acidophilus and see what happends.Been about 4 years.

  It have a bloatted feeling and Nausea.
hschneider (Verified User)

have taken for 7 days, have a blotted felling & nausea


I think it accentuates acid reflux for some of us.

  Loved the product.
EvenmoreAnonymous (Verified User)

Hmm, i’d believe it causes weight gain in some people b/c we all respond differently to things. I took some quality probiotics (w/acidiphilus and other strains) for about a month and a half and somehow gained almost 10 lbs! Incredible considering I was tracking every morsel that passed my lips (I definitely wasn’t overheating) and working out for at least an hour a day ! My theory is that they must’ve improved my digestion to the point where my stomach managed to somehow collect and absorb every freaking calorie that entered my stomach! Its the only explanation I have cause I know I should’ve been losing weight and furthermore, as soon as I quit taking the probiotics and did a course of antibiotics (for a totally unrelated reason) i suddenly lost weight rapidly–as if all my hard work suddenly started to kick in! I guess not all of us need all that bacteria brewing in our belly. It certainly got a little too “friendly” for my tastes.

  How can it possibly cause weight gain
Bthany (Verified User)

How can it possibly cause weight gain, I have been dieting and exercising, using my acidophilus and lost 5 pounds so far


yeah! so about the weight gain!.. I’ve been taking the acidophilus pills and so far I’ve lost 4 lbs in one week. Not sure I buy into the whole bit of weight gain!