# Lactobacillus acidophilus La-14 **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/lactobacillus-acidophilus-la-14 **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-18 **Evidence Score:** 8 / 10 **Category:** Other **Also Known As:** Lactobacillus acidophilus strain La-14, L. acidophilus La-14, Acidophilus La-14, La-14 probiotic strain, Lactobacillus acidophilus ATCC SD5212, Acidophilus bacteria La-14 ## Overview Lactobacillus acidophilus La-14 is a clinically studied probiotic strain that produces lactic acid and bacteriocins to maintain gut microbial balance. It enhances [digestive health](/ingredients/condition/gut-health) and [immune function](/ingredients/condition/immune-support) through colonization of intestinal epithelium and stimulation of secretory IgA production. ## Health Benefits - Supports [digestive health](/ingredients/condition/gut-health) by maintaining a balanced gut microbiome, which can reduce digestive discomfort by 40%. It promotes regularity and comfort. - Enhances [immune function](/ingredients/condition/immune-support) by stimulating the production of IgA antibodies, which protect against pathogens. It fortifies the body's natural defenses. - Reduces cholesterol levels by breaking down bile in the gut, leading to a 10% reduction in LDL cholesterol. It supports [cardiovascular health](/ingredients/condition/heart-health). - Improves lactose tolerance by producing lactase, allowing for easier digestion of dairy products. It broadens dietary choices for lactose-intolerant individuals. - Boosts mood by influencing the gut-brain axis, which can improve symptoms of anxiety and depression. It supports [mental clarity](/ingredients/condition/cognitive) and emotional well-being. - Promotes [skin health](/ingredients/condition/skin-health) by reducing [inflammation](/ingredients/condition/inflammation) and [oxidative stress](/ingredients/condition/antioxidant), leading to clearer skin. It enhances the skin's natural glow. - Aids in weight management by influencing metabolic pathways, which can help regulate body weight. It supports a healthy lifestyle. ## Mechanism of Action La-14 adheres to intestinal epithelial cells via surface proteins, producing lactic acid and hydrogen peroxide that create an acidic environment inhibiting pathogenic bacteria. The strain stimulates Toll-like receptors on immune cells, triggering [NF-κB](/ingredients/condition/inflammation) signaling pathways that enhance secretory IgA antibody production. It also produces bacteriocins like acidophilin that directly inhibit harmful microorganisms in the gut. ## Clinical Summary Clinical studies on Lactobacillus acidophilus La-14 include randomized controlled trials with sample sizes ranging from 60-200 participants over 4-12 week periods. Research demonstrates 40% reduction in digestive discomfort and significant improvements in stool consistency and bowel movement frequency. Studies show increased secretory IgA levels by 25-30% compared to placebo groups. However, most trials are short-term, and more long-term safety data is needed. ## Nutritional Profile - Available in [probiotic](/ingredients/condition/gut-health) supplements and some dairy products. - Contains live bacteria that support gut and immune health. - Often combined with other strains for enhanced probiotic effects. ## Dosage & Preparation Commonly consumed in doses of 1-10 billion CFU per day. Consult a healthcare provider before use. ## Safety & Drug Interactions Lactobacillus acidophilus La-14 is generally well-tolerated with mild side effects including temporary bloating or gas during initial supplementation. It may interact with immunosuppressive medications by potentially enhancing immune responses. Individuals with severe immunocompromised conditions or damaged intestinal lining should consult healthcare providers before use. Safety during pregnancy and breastfeeding has not been extensively studied, though [probiotic](/ingredients/condition/gut-health)s are generally considered safe. ## Scientific Research Lactobacillus acidophilus La-14 has been shown to support gut and immune health, with studies highlighting its role in improving symptoms of IBS and preventing infections. ## Historical & Cultural Context [Probiotic](/ingredients/condition/gut-health)s like Lactobacillus acidophilus have been used for centuries in fermented foods, valued for their health-promoting properties. ## Synergistic Combinations Bifidobacterium, [Prebiotic](/ingredients/condition/gut-health)s, Yogurt, Gut microbiota, [Immune support](/ingredients/condition/immune-support) ## Frequently Asked Questions ### What is the recommended dosage of Lactobacillus acidophilus La-14? Clinical studies typically use dosages ranging from 1-10 billion CFU (colony forming units) daily. Most supplements provide 5-10 billion CFU per capsule taken once or twice daily with meals. ### How long does it take for La-14 to colonize the gut? Initial colonization begins within 3-7 days of supplementation, with optimal gut population levels typically achieved after 2-4 weeks of consistent daily intake. Benefits may be noticed within the first week. ### Can La-14 survive stomach acid? Lactobacillus acidophilus La-14 demonstrates good acid tolerance and can survive gastric pH levels around 2.0-3.0. Taking it with food or in enteric-coated capsules further improves survival rates through the digestive tract. ### Does La-14 need refrigeration? While refrigeration extends shelf life, many La-14 supplements are freeze-dried and stable at room temperature for 12-24 months. Check manufacturer specifications, as some formulations require refrigeration to maintain potency. ### Can I take La-14 with antibiotics? La-14 can be taken during antibiotic treatment but should be spaced 2-3 hours apart from antibiotic doses. It's particularly beneficial for preventing antibiotic-associated diarrhea and restoring gut flora after treatment completion. ### What clinical research supports the effectiveness of Lactobacillus acidophilus La-14? La-14 has been studied in multiple clinical trials demonstrating its ability to reduce digestive discomfort by approximately 40% and lower LDL cholesterol by up to 10% through bile acid metabolism. Research also shows that La-14 stimulates IgA antibody production, enhancing immune defense against pathogens. These findings are based on peer-reviewed studies evaluating the strain's specific mechanisms in the human gut. ### Who should avoid taking Lactobacillus acidophilus La-14? Individuals with severe immunocompromise (such as those with advanced HIV/AIDS or on immunosuppressive therapy) should consult a healthcare provider before taking La-14, as probiotics can occasionally cause infections in this population. People with a documented allergy to any ingredient in the formulation should avoid it. Those with short bowel syndrome or central venous catheters should also seek medical guidance before use. ### How does Lactobacillus acidophilus La-14 compare to other common probiotic strains? La-14 is specifically selected for its acid-resistance and ability to survive stomach pH, making it more effective at colonization than some other Lactobacillus strains. Unlike general-purpose probiotics, La-14 is documented to reduce cholesterol through bile acid breakdown and enhance immune function via IgA production—benefits not equally demonstrated across all probiotic species. Its efficacy is strain-specific, meaning other acidophilus strains may have different potency or mechanisms of action. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*