Does vitamin therapy help you age well? The question sits at the crossroads of nutrition science and gut health, two central pillars of aging and vitamin therapy. Science increasingly shows that keeping essential micronutrient levels in balance can support energy metabolism, immune resilience, and cognitive function as we get older. At the same time, more is not always better: high-dose supplements can backfire, and needs vary from person to person. Emerging research also highlights the gut microbiome as a key gateway to how we absorb and synthesize vitamins, linking aging and vitamin therapy to gut health in meaningful ways. A practical approach blends evidence-based guidelines with personalization, starting from a clear micronutrient baseline and a gut-health-informed plan. Science-backed tips for aging and vitamin therapy emphasize personalization and context. Start with a baseline assessment of nutrients such as vitamin D, B12, folate, and others, ideally guided by a clinician. Build your plan around a nutrient-dense diet as the foundation, using supplements only when indicated by test results. Prioritize nutrients with well-supported roles in aging, like vitamin D for bone and immune health and omega-3s for inflammation and brain health, but tailor doses to your needs. Pair vitamin timing and absorption tips with attention to gut health—since the gut microbiome influences nutrient metabolism, optimizing gut health can improve how your body uses vitamins. For hands-on personalization, you can begin by exploring tools that combine nutrient data with gut-health insights, such as a microbiome test that informs dietary and supplement decisions. To explore a tailored approach, see the InnerBuddies microbiome test. InnerBuddies offers a white-label Gut Health Operating System designed to power gut microbiome testing products for brands and consumers alike. Its platform features a Gut Microbiome Health Index (0–100) based on an exclusive IP deal with EAFIT University in Colombia, along with granular data on Bacteria abundances and how your composition compares to a healthy cohort. In addition, the platform categorizes Bacteria functions and shows how your functional pathways align with or diverge from a healthy reference. Target Group analysis, including Healthy Aging, lets providers drill into pathways relevant to aging and other focus areas. Personalized nutrition advice uses data from 3-day food diaries and stool samples to tailor recommendations, while personalized probiotics and prebiotics suggestions further refine your plan. Consumers can access these insights directly, and B2B teams can deploy the system to their own brands. If you’re interested in ongoing guidance and hands-on personalization, check out the InnerBuddies subscription for continuous updates and tailored plans, or learn more about partnership opportunities for brands through their B2B program. You can discover more about the consumer offering at InnerBuddies Gut Health Membership, and for direct consumer testing, the InnerBuddies microbiome test. For brands and companies looking to integrate this technology, see the InnerBuddies B2B partner page. Together, aging and vitamin therapy become a personalized, gut-informed journey toward healthier aging.