on August 27, 2026
White paper by Jennifer L. Greer, ND, MEd — August 2026 · 36 peer-reviewed references
Executive Summary
Even the best-researched nutraceutical ingredient is only as effective as the amount that reaches its target tissue. This white paper examines why so many supplements underperform — poor solubility, intestinal permeability barriers, first-pass metabolism, nutrient competition, and the cellular energy cost of absorption itself — and shows that these barriers rarely act alone. When bioavailability is limited at more than one physiological stage, addressing a single barrier is unlikely to resolve the limitation.
This principle defines the formulation philosophy behind Absorptix®: an anti-competitive formulation logic that targets three classes of nutrient utilization simultaneously. The Energy class supports the ATP-dependent transport that drives most nutrient uptake; the Bioactivity class prioritizes body-ready nutrient forms such as 5-MTHF, methylcobalamin, and P-5-P that bypass conversion bottlenecks; the Environment class supports the gut lining and microbiome on which absorption ultimately depends. Each ingredient is delivered by its own transport route, minimizing the competitive inhibition that undermines conventional multi-ingredient formulas — and absorption is achieved without reliance on bioenhancers such as piperine, whose long-term safety profile remains insufficiently studied.
The conclusion for formulators, brands, and practitioners is the same: in nutraceuticals, formulation strategy is absorption strategy.
