New findings show targeted supplements may lower inflammation, heart rate, and intestinal stress during workouts in high temperatures.
By yourNEWS Media Newsroom
Research unveiled at the 2026 American Physiology Summit indicates that specific dietary supplements may help reduce intestinal damage, inflammation, and physical strain associated with exercising in high temperatures.
Scientists reported that heat exposure during physical activity forces the body to redirect blood flow away from the digestive system to support cooling and muscle function. This shift weakens the intestinal lining, allowing harmful substances to enter circulation, a condition commonly referred to as increased intestinal permeability. The resulting effects include inflammation, elevated cardiovascular strain, and delayed recovery.
The research evaluated four compounds—probiotics, curcumin, berberine, and New Zealand blackcurrant extract—measuring their effects on core temperature, heart rate, gut barrier integrity, inflammation markers, and subjective exertion.
A probiotic formulation containing Bifidobacterium lactis HN019 and Lactobacillus rhamnosus HN001 demonstrated measurable physiological benefits. Participants who consumed the probiotic for four to six weeks prior to heat exposure experienced an average reduction of 14 beats per minute in heart rate during exercise. Reports of gastrointestinal discomfort, including bloating and stomach pain, declined, while several inflammatory markers decreased following exertion. Mood assessments also reflected lower fatigue levels.
Curcumin, a compound derived from turmeric, showed rapid effects within three days at a daily dose of 500 milligrams. Participants exhibited reduced core temperatures and lower heart rates compared to control groups. A biomarker used to assess intestinal cell damage increased less significantly in those taking curcumin than in those receiving a placebo. Inflammatory proteins remained stable among the curcumin group but rose in the control group following exercise.
New Zealand blackcurrant extract, administered at 600 milligrams daily for seven days, produced improvements in intestinal barrier function. Researchers observed a 40% reduction in markers associated with gut injury and a 12% improvement in permeability. Unlike curcumin, the extract did not significantly alter systemic inflammatory markers, suggesting its effects were localized to gut integrity.
Berberine, a plant-derived compound found in species such as goldenseal, was evaluated for its impact on thermoregulation. After one week of supplementation at 1.5 grams per day, participants recorded slightly lower body temperatures and heart rates during exercise. Respiratory efficiency improved, and participants consistently rated physical exertion as less intense. However, berberine did not significantly influence inflammation indicators.
Researchers noted that each supplement operates through distinct biological pathways. Probiotics appeared to support gut microbiota balance and reduce systemic stress responses. Curcumin demonstrated both anti-inflammatory and gut-protective properties. Blackcurrant extract primarily strengthened the intestinal barrier, while berberine influenced temperature regulation and perceived exertion.
The findings reflect growing scientific interest in non-pharmaceutical approaches to managing exercise-related stress, particularly in high-heat conditions. Several of the compounds studied have longstanding use in traditional health practices, including turmeric in Ayurvedic medicine and fermented foods as sources of beneficial bacteria.
The research also provided guidance on supplementation timing. Probiotics require several weeks of consistent use prior to exposure, while curcumin may offer benefits within days. Both berberine and blackcurrant extract showed effectiveness after approximately one week of intake.
Investigators emphasized that individuals should consult healthcare professionals before beginning supplementation, particularly due to potential interactions with medications.
The study underscores the role of intestinal health in overall physical performance, particularly under environmental stress. As global temperatures rise and outdoor activity remains common, maintaining gut integrity may become an increasingly important factor in managing exercise recovery and endurance.
Source: Natural News