A new study indicates that daily prebiotic fiber supplements may improve cognitive function in adults aged 60 and older. Researchers say participants who took a prebiotic-enhanced protein powder showed better memory and learning performance after 12 weeks. The findings, reported in Nature Communications, offer a potentially accessible approach to healthier aging in Thailand’s growing senior population.
Thailand faces a rapid demographic shift. By 2030, about a quarter of the population is expected to be 60 or older, raising concerns about dementia and disability. Public health experts and families are watching closely for interventions that are affordable and practical for everyday life.
The study, conducted at King’s College London, followed 36 pairs of identical twins aged 60 or above. In each pair, one twin consumed a protein powder with inulin and fructo-oligosaccharides (FOS), while the other received the same protein powder with a placebo. After 12 weeks, the prebiotic group made fewer errors on visual memory and learning tasks, indicators that often precede cognitive decline.
Experts explain that prebiotics feed beneficial gut bacteria, potentially influencing the gut-brain axis—the communication pathway between the gut and the brain. The research team noted an increase in bifidobacteria among participants who received the prebiotic, a change researchers believe could affect brain function through gut-derived signaling, neural chemistry, and inflammation modulation. Still, the exact mechanism remains under study.
This trial focused on specific prebiotic fibers, particularly inulin and FOS, rather than psyllium, which is common in many fiber supplements. While these results are encouraging, scientists caution that more research is needed to determine whether other fiber sources yield similar cognitive benefits. Dietitians emphasize a broader range of prebiotic fibers can support digestive health, blood sugar regulation, and mineral absorption.
Many Thais fall short of daily fiber targets. Nutrition guidance generally recommends 25–35 grams of total daily fiber, with 10–20 grams as prebiotics. Natural food sources include bananas, garlic, onions, leeks, asparagus, and artichokes. For those struggling to meet targets, certified dietary supplements can help bridge the gap, according to discussions from global health experts and regulatory bodies.
Thailand’s aging society already faces increasing dementia and neurodegenerative concerns. While Thai cuisine—rich in vegetables, legumes, and fermented foods—provides natural prebiotics, shifts toward convenience foods may threaten these benefits. Still, traditional dishes such as tom yum with garlic and lemongrass, or som tam, contain ingredients that support prebiotic intake and can be leveraged in public health messaging.
From a policy standpoint, the findings align with Thailand’s focus on preventive care and healthy aging. Fiber supplements should complement, not replace, exercise, social engagement, and lifelong learning. Some hospitals and community health centers could pilot prebiotic programs, especially in areas with higher senior populations.
As with any intervention, individuals with sensitive digestion or irritable bowel syndrome should introduce prebiotics gradually, increasing intake by about 3–5 grams per day to minimize bloating or cramps.
The broader implications are significant. Ongoing microbiome research will help clarify which populations benefit most, optimize formulations, and determine long-term effects. Thailand’s robust medical research community is well-positioned to contribute to and benefit from this evolving field.
For now, older adults and their families are advised to prioritize diverse, fiber-rich diets—featuring a range of vegetables, herbs, and fruits—and consider reputable prebiotic supplements if needed, after consulting a healthcare professional. A thoughtful, culturally inspired approach to nutrition could support healthier, more independent aging across the country.