Lac-Shield™ (Heat-Killed Lactobacillus paracasei MCC1849) is a proprietary postbiotic ingredient from Japan that has been extensively researched and shown to help support the body's immune function. Clinical studies have demonstrated that Lac-Shield™ provides comprehensive support against the common cold by helping reduce the risk of catching a cold, alleviate cold symptoms, and shorten the duration of illness. [1], [2]
In Thailand, where the incidence of the common cold remains high throughout the year, particularly during periods of changing weather when immune function may be compromised, dietary supplements have become an increasingly popular self-care option. Lac-Shield™ offers targeted immune support, making it a suitable choice for those looking to strengthen their natural defenses.
| Common Name | Lactobacillus paracasei MCC1849 |
| Appearance | A white powder. |
| Source | Lactobacillus paracasei MCC1849 (Postbiotic) |
| Key Benefits | Supports immune function, helps reduce the risk of catching a cold, alleviates cold symptoms, and shortens the duration of illness |
| Recommended Product | Nectapharma Imuvatec |
TLDR
Lac-Shield™ is a postbiotic derived from Lactobacillus paracasei MCC1849, a proprietary Japanese strain that has been heat-killed while retaining its immune-supporting properties at the cellular level.
Clinical studies have shown that Lac-Shield™ helps reduce the risk of catching a cold, alleviate cold symptoms, and shorten the duration of illness in individuals who are prone to frequent colds.
The Science Behind Lac-Shield™ and Its Immune Benefits
What Is Lac-Shield™ Postbiotic?
Lac-Shield™ is a proprietary microbial strain from Japan (Lactobacillus paracasei MCC1849) that undergoes a heat-treatment process known as Heat-Killed Technology, resulting in an inactivated whole-cell postbiotic. Research and clinical studies have demonstrated that Lactobacillus paracasei MCC1849 stands out among other strains for its ability to support and enhance immune function.
How Does Lac-Shield™ Work?
Lac-Shield™ Postbiotic supports immune health at the cellular level by stimulating the production of Interleukin-12 (IL-12), which helps increase both the number and activity of Natural Killer (NK) Cells. As a key component of the body's innate immune system, NK cells help strengthen the body's natural defense against pathogens.
Benefits of Lac-Shield™ for Individuals Prone to Frequent Colds
Clinical studies involving individuals with a history of experiencing at least one cold per year found that supplementation with 10 billion cells of Lac-Shield™ Postbiotic—equivalent to one Imuvatec capsule daily—for 12 consecutive weeks resulted in significant benefits. Compared with those who did not receive supplementation, participants taking Lac-Shield™ experienced a 20.8% lower risk of catching a cold, a 27% reduction in cold symptoms, and a 26% shorter duration of illness. In addition, participants reported feeling less fatigued, more energetic, and more active during the study period. [1], [2]
Who Is Lac-Shield™ Suitable For?
Lac-Shield™ is a clinically studied immune-support postbiotic with evidence supporting its benefits against the common cold through the activation of natural immune responses at the cellular level. Clinical studies have shown that it helps reduce the risk of catching a cold, alleviate cold symptoms, and shorten the duration of illness. It is particularly suitable for individuals at risk of weakened immunity, including those who experience inadequate sleep, chronic stress, insufficient physical activity, or frequent illness.
