Two products can list the same ingredient on their label and deliver completely different results. The reason is almost always bioavailability — how much of an ingredient actually reaches the tissues where it needs to work.
Walk down any supplement aisle and you will find dozens of products listing magnesium, berberine, or melatonin on their labels. Two products can contain the same milligram dose of the same ingredient and produce completely different outcomes in the body. The reason is almost always bioavailability — the proportion of an administered substance that reaches systemic circulation in an active form and is available to exert its intended effect.
Bioavailability refers to the proportion of an administered substance that reaches systemic circulation in an active form. For oral supplements, this means surviving the gastrointestinal environment, being absorbed through the intestinal wall, surviving first-pass metabolism in the liver, and reaching target tissues in a biologically active form. Each of these steps represents a potential point of loss.
Published: 2025-03-28 • Last updated: 2025-07-01 • By SaBio Science Team • Category: Science & Research
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