200 billion CFUs/gram
Ingredients: L. Casei
Why High Potency? How much should I take?
Using a dose less than 25 Billion per day will have limited health benefits -- you will need a higher potency to get desirable results. Many people have used other probiotic brands with minimal results because of their low potency.
It depends on the person and the issue that is being addressed. You’ll start to see results at a minimum of 25 Billion CFUs per day. The average daily dose by our customers is between 200-400 Billion CFUs per day. Some people see significant results with dosages as high as 800 Billion CFUs per day.
10g Size ($2.70 per gram):
666 servings if using 3 Billion CFU serving size (~1/256 teaspoon or 15.625mg)
400 servings if using 5 Billion CFU serving size (~1/128 teaspoon or 31.25mg)
200 servings if using 10 Billion CFU serving size (~1/64 teaspoon or 62.5mg)
100 servings if using 20 Billion CFU serving size (~1/32 teaspoon or 125mg)
40 servings if using 50 Billion CFU serving size (1/16 teaspoon or 0.25g)
20 servings if using 100 Billion CFU serving size (1/8 teaspoon or 0.5g)
50g Size ($1.69 per gram)
3,333 servings if using 3 Billion CFU serving size (~1/256 teaspoon or 15.625mg)
2,000 servings if using 5 Billion CFU serving size (~1/128 teaspoon or 31.25mg)
1,000 servings if using 10 Billion CFU serving size (~1/64 teaspoon or 62.5mg)
500 servings if using 20 Billion CFU serving size (~1/32 teaspoon or 125mg)
200 servings if using 50 Billion CFU serving size (1/16 teaspoon or 0.25g)
100 servings if using 100 Billion CFU serving size (1/8 teaspoon or 0.5g)
50 servings if using 200 Billion CFU serving size (1/4 teaspoon or 1g)
100g Size ($1.42 per gram):
6,666 servings if using 3 Billion CFU serving size (~1/256 teaspoon or 15.625mg)
4,000 servings if using 5 Billion CFU serving size (~1/128 teaspoon or 31.25mg)
2,000 servings if using 10 Billion CFU serving size (~1/64 teaspoon or 62.5mg)
1,000 servings if using 20 Billion CFU serving size (~1/32 teaspoon or 125mg)
400 servings if using 50 Billion CFU serving size (1/16 teaspoon or 0.25g)
200 servings if using 100 Billion CFU serving size (1/8 teaspoon or 0.5g)
100 servings if using 200 Billion CFU serving size (1/4 teaspoon or 1g)
Statement on Allergens
Free of Artificial Colors or Flavors
How long will a 50 gram or 100 gram powder last?
50 grams will last about 2 months if you take 200 Billion CFUs per day or 8 months if you take 50 Billion CFUs per day. 100 grams will last about 4 months if you take 200 Billion CFUs per day.
Can infants and children take probiotics?
Based on existing research, infants can start taking probiotics at 6 months of age.
How much probiotics can an infant take?
Infants can take up to 50 Billion CFU per day.
What are CFUs?
CFU stands for Colony Forming Unit. This is the bacterial count of probiotics.
Why aren’t BulkProbiotics enteric coated?
Enteric coated probiotics are mainly a marketing gimmick. The strains that are used at BulkProbiotics are vetted to have excellent acid and bile tolerance as well as the capacity to survive intestinal transit.
What happens if I leave the probiotics outside of the refrigerator for a couple of days?
2 year temperature stability testing has been performed on our probiotics and the loss would be negligible. Our probiotics can remain at room temperature (or travel) for 2-3 weeks with limited loss, however, it is best to store the probiotics in the refrigerator for optimum potency.
Why do some individuals get a “die-off” reaction?
This is due to a ‘war’ that occurs between the probiotics and the bad bacteria in your body. If there is a large imbalance in your gut bacteria, the die-off reaction will be higher. To avoid this we recommend that you gradually increase your dosage starting with about 25 Billion CFU per day and increase every few days over a couple of weeks.
Do your probiotics contain any dairy or gluten?
Our probiotics are dairy and gluten free. They do not utilize milk, milk derivatives, GOS, or Inulin as additional ingredients in the fermentation media.
When should I take probiotics? Is it ok to take probiotics with drugs, vitamins, or antibiotics?
As a digestive aid, it is best to take 30 minutes before a meal; otherwise, it is also ok to take on an empty stomach in the morning or at bedtime (at least 2 hours after eating). Probiotics should not be taken with antibiotics (take 2 hours before or after taking antibiotics).
What is the return policy?
We accept returns within 30 days for all 10g probiotic powders that are unopened. We do not accept returns for any other sizes. The 10g size is available to experiment to help you find the right probiotic strains for you.
- casei is a beneficial gut microbe that may have probiotic benefits for gut health, stress, immunity, and more. Read on to learn more.
What is Lactobacillus casei?
Lactobacillus casei is a Gram-positive, nonpathogenic lactic acid bacterium . It is found in fermented dairy products (e.g. cheese), plant materials (e.g. wine, pickles) and in the reproductive and gastrointestinal tracts of humans and animals [2, 3].
As a nutritional supplement, Lactobacillus casei has been shown to improve intestinal microbial balance, arthritis, and type 2 diabetes.
- casei combined with prebiotic inulin improved human plasma antioxidant capacity .
Treatment with L. casei reduced oxidative stress caused by aflatoxin and induced a significant improvement in all the biochemical and histological liver parameters in rats .
Possibly Effective For
1) Gut Health
- casei consumption altered the composition and diversity of human intestinal microbiota. There is a positive correlation between L. casei and Prevotella, Lactobacillus, Faecalibacterium, Propionibacterium, Bifidobacterium and some Bacteroidaceae and Lachnospiraceae, and a negative correlation with the presence of Clostridium, Phascolarctobacterium, Serratia, Enterococcus, Shigella, and Shewanella .
- casei suppressed potentially harmful Pseudomonas and Acinetobacter in volunteers .
Fermented milk containing L. casei preserved the diversity of the gut microbiota, relieved abdominal dysfunction, and prevented an increase in cortisol levels in healthy medical students exposed to academic stress .
Constipation and Diarrhea
Continuous consumption of fermented milk containing L. casei alleviated constipation-related symptoms, provided satisfactory bowel habits, and resulted in earlier recovery from hemorrhoids in women after childbirth .
A fermented milk beverage containing L. casei relieved irregular bowel movement in gastrectomized patients. It reduced the degree of constipation and improved diarrhea .
- casei intake was associated with less antibiotic-associated diarrhea in patients [12, 13], reduced the incidence, duration, and severity of diarrhea in children [14, 15], and prevented constipation in mice .
Intestinal Injury and Inflammation
- casei relieved aspirin-associated small bowel injury , induced complete recovery in mice with enteropathy (such as Coeliac disease) , and ameliorated colitis in rats  and mice .
- casei decreased the severity of intestinal inflammation in mice with inflammatory bowel disease (IBD)  and can counteract the pro-inflammatory effects of E. coli on Crohn’s disease inflamed mucosa by downregulating proinflammatory cytokines .
In a study of 47 medical students undertaking an authorized nationwide examination to test their response to stress, L. casei increased serotonin levels, lowered the rate of subjects experiencing common abdominal and cold symptoms and decreased the total number of days students experienced these symptoms .
- casei lowered academic stress-induced increases in cortisol and the incidence of physical symptoms in students. In rats, Lactobacillus casei suppressed blood corticosterone levels .
- casei enhanced the immune system during its transit in the digestive tract of animals [15, 24] and was shown to stimulate nitric oxide, cytokine, and prostaglandin production .
- casei promoted the recovery of immunosuppression caused by chemotherapeutic agents in mice, by activating natural killer (NK) cells, cytotoxic T cells and macrophages . These are all white blood cells that recognize and eliminate tumor cells and infected cells.
Respiratory and Gastrointestinal Infections
While some studies found no evidence that consuming L. casei protects against respiratory symptoms , many others have found that L. casei was beneficial in both respiratory and gastrointestinal infections.
- casei significantly lowered the incidence and duration of upper respiratory tract infections (URTIs) in healthy middle-aged office workers .
Similarly, in healthy shift workers, L. casei decreased the incidence of gastrointestinal and respiratory common infectious disease (CIDs), increased the time to the first occurrence of CID, and reduced the total number of CIDs in the subgroup of smokers. In the course of CID, the total duration of fever was lower and an increase in leukocyte, neutrophil, and natural killer (NK) cell counts and activity was observed .
- casei also lowered the incidence of common infectious diseases (CIDs) in children , decreased the duration of CID, and especially lessened upper-respiratory-tract infections (URTI) such as rhinopharyngitis in the elderly .
In athletic men and women who engaged in endurance-based physical activities in winter, L. casei lowered the proportion of subjects who experienced 1 or more weeks with upper-respiratory-tract infection (URTI) symptoms and decreased the number of URTI episodes .
Administration of the probiotic L. casei in conjunction with albendazole reduced the Giardia infection and enhanced recovery in mice .
Continuous intake of L. casei contributes to the alleviation of fever caused by norovirus gastroenteritis by correcting the imbalance of the intestinal microflora in the elderly .
Frequent treatment of mice with L. casei induced total protection against infection with Trichinella spiralis parasite worms .
The intake of milk fermented with L. casei during the lactation period modestly contributed to the modulation of the mother’s immunological response after delivery and decreases the incidence of gastrointestinal episodes in the breastfed child .
- casei improved natural killer (NK) cell activity and produced a more anti-inflammatory cytokine profile in 30 healthy, non-immunocompromised elderly subjects .
- casei acts as an anti-inflammatory agent . It was shown that this bacterium has anti-inflammatory effects when it is administered as a supplement in mice fed a high-fat-diet .
- L. casei increased the prevalence of Lactobacilli in mice microbiota and alters the expression of cytokines in a manner consistent with an anti-inflammatory response .
- casei protects mice from anaphylaxis (acute allergic inflammation) and arthritis (autoimmune inflammation) .
Live L. casei counteracted the proinflammatory effects of E. coli on Crohn’s disease inflamed mucosa by specific downregulation of proinflammatory cytokines [21, 15].
- casei supplementation helped alleviate symptoms and improve inflammatory cytokines in 46 women with rheumatoid arthritis .
- casei protected mice from autoimmune arthritis , and its consumption prior to infection abolishes intestinal and joint inflammation triggered by Salmonella in mice .
- casei positively contributed to osteoarthritis treatment in rats, by reducing pain, inflammatory responses, and articular cartilage degradation. L. casei together with glucosamine decreased expression of various pro-inflammatory cytokines and matrix metalloproteinases while up-regulating anti-inflammatory cytokines .
Similarly, L. casei effectively suppressed symptoms of rheumatoid arthritis in rats, paw swelling, lymphocyte infiltration and destruction of cartilage tissues. Anti-inflammatory cytokines were increased, while pro-inflammatory cytokines were decreased [43, 44, 45].
Volunteers with seasonal allergic rhinitis treated with L. casei showed a significant reduction in levels of antigen-induced cytokines, showing that probiotic supplementation modulated immune responses in allergic rhinitis and may have the potential to alleviate the severity of symptoms .
- casei protected mice from acute allergic inflammation (anaphylaxis) .
Following airway allergen administration, mice fed L. casei showed evidence of attenuation of lung inflammation, as well as reductions in proinflammatory cytokines .
7) Dental Health
Oral administration of L. casei reduced the number of pathogenic (periodontopathic) bacteria in healthy volunteers with mild to moderate gum inflammation (periodontitis) .
8) Cardiovascular Disease
- casei improved insulin sensitivity index in humans, an important risk factor for cardiovascular morbidity, especially stroke and coronary heart disease and mortality  and was shown to reduce cholesterol in laboratory experiments .
A synbiotic blend including L. casei improved fasting blood sugar and insulin in 38 subjects with insulin resistance .
- casei attenuates the hyperglycemic response to glucose and blood glycerol levels in rats .
Furthermore, long‐term ingestion of L. casei ameliorates insulin resistance and glucose intolerance in rats fed a high-fat diet , rats with hyperinsulinemia , and obese mice .
- casei significantly lowers blood levels of pro-inflammatory cytokines and neutrophils in diabetic rats, lowering the risk of diabetes mellitus and its complications .
- casei significantly improved glucose intolerance, dyslipidemia, immune-regulatory properties, and oxidative stress in mice with type 2 diabetes .
10) Complications from Smoking
Cigarette smoking reduces natural killer (NK) activity. L. casei intake prevented the smoke-dependent NK activity reduction in 72 Italian male smokers .
Animal & Cell Research (Lacking Evidence)
No clinical evidence supports the use of L. casei for any of the conditions listed in this section. Below is a summary of the existing animal and cell-based research, which should guide further investigational efforts. However, the studies listed below should not be interpreted as supportive of any health benefit.
An L. casei protein P14 reduced symptoms of atopic dermatitis in mice .
The addition of L. casei to the diet of mice improves survival and resistance against C. albicans infection. This bacterium normalizes the immune response, allowing efficient recruitment and activation of phagocytes, as well as the effective release of pro-inflammatory cytokines .
Even heat-killed L. casei protects immunodeficient mice against C. albicans .
- casei supplementation improved body weight in rats fed a high-fat diet  and had anti-inflammatory effects when it is administered as a supplement in mice fed a high-fat-diet .
- casei improved insulin resistance and glucose intolerance in mice with diet-induced obesity .
14) H. pylori
- casei was effective against H. pylori in laboratory experiments .
15) Liver Function
- casei attenuated alcohol-induced liver cell damage in a dish .
In chronic alcohol-induced mice, whey fermented with L. casei significantly attenuated the increased levels of alanine aminotransferase, aspartate aminotransferase, and triglycerides; increased antioxidant activity; and improved liver parameters .
- casei protects against the onset of non-alcoholic fatty liver disease (NAFLD) in mice , and suppresses nonalcoholic steatohepatitis development, by reducing blood lipopolysaccharide concentrations, suppressing inflammation and fibrosis in the liver, and reducing colon inflammation .
- casei significantly improved the survival of rats with liver injury, via its anti-oxidative and anti-inflammatory capacities .
In rats with acute liver failure, L. casei inhibits pro-inflammatory cytokines, attenuates hepatic inflammation, prevents intestinal injury and modulates the intestinal microbiota by increasing Lactobacillus and Bifidobacterium levels .
Lactobacillus casei can bind to heterocyclic aromatic amines and can decrease their concentration and their toxicity .
Lactobacillus casei decreases the cytotoxic effects of pesticides on human cells .
Lactobacillus casei supplementation reduces the level of aflatoxin in blood and can improve the adverse effect on body weight and blood parameters in rats .
A fermented milk drink containing Lactobacillus casei may reduce aflatoxin toxicity in humans .
17) Histamine Intolerance
- casei degrades biogenic amines (BAs) and reduces histamine and tyramine accumulation in cheese .
18) Cognitive Performance
- casei potentiated the effect of proanthocyanidins extracted from lotus seedpod, ameliorated memory impairment in mice, and improved total antioxidant capacity level .
Animal & Cell Studies
- casei is able to suppress the growth of adult T-cell leukemia cells, acute lymphoblastic leukemia cells and promonocytic leukemia cells .
In cell and animal studies, researchers have observed that L. casei:
- Decreased pro-inflammatory cytokines such as TNF-α, IFN-γ, interleukins IL-2, IL-6, IL-8, IL-17, IL-23, IL-1β [3, 39, 38, 21, 15].
- Increased anti-inflammatory cytokines such as IL-10 [3, 38].
- Inhibited nuclear factor NF-κB .
- May have prevented inflammation in patients who had already synthesized specific IgE or autoantibodies .
Lactobacillus casei is generally well tolerated. The use of probiotics should be avoided in patients with organ failure, immunocompromised status, and dysfunctional gut barrier mechanisms. To avoid adverse effects, talk to your doctor before starting any new probiotic supplements.
*These statements have not been evaluated by the Food and Drug Administration.
*These products are not intended to diagnose, treat, cure, or prevent any disease.