Food-Grown® Zinc scientific study
Food-Grown® Zinc delivers 75% better absorption than standard zinc oxide, as proven in a clinical study—supporting immune health, cognitive function, and overall wellbeing with superior bioavailability.
Zinc plays a vital role in various bodily functions, including supporting skin health, aiding in wound healing, immune system support, and supporting growth and development. It is also an essential for taste and smell perception, reproductive health, and overall wellbeing.
However, not all Zinc supplements are created equal, and some are better for absorption and retention than others. A published independent study demonstrates that Food-Grown® Zinc is one of the best sources for absorption and retention, which means the body can utilise it more efficiently.
Read on to explore more…
How was it conducted?
Participants:
- Five healthy adults (3 men & 2 women) aged 21–44 participated in blood tests
- Four of those volunteers repeated the study for excretion measurements in urine samples
- Each participant received a 10mg dose of either Zinc Sulphate (inorganic), Zinc Gluconate (organic) or Food-Grown® Zinc yeast (also known as re-natured Zinc), one week apart, under fasting conditions.
What benefits were they seeking?
Assessments set out to understand the bioavailability of each kind of Zinc. Blood Zinc levels were measured over time to determine how much was absorbed. While urine Zinc levels were collected for 24 hours before and after to assess how much was excreted and therefore not retained by the body.
What did they find?
he study concluded that Food-Grown® Zinc is:
MORE BIOAVAILABLE
Zinc yeast (re-natured Zinc) is more bioavailable than both inorganic and Gluconate forms.
BETTER ABSORBED
Zinc grown in a yeast medium was 75% better absorbed than Zinc Sulphate and 58% better absorbed than Zinc Gluconate. Staying in the body longer, Food-Grown® Zinc was also absorbed at a slower rate, acting like a time-release formula.
BETTER RETAINED
Zinc in a base of yeast had the lowest excretion, suggesting better tissue retention.
Although it should be noted that the sample size was small, the study duration was short (single doses) and therefore did not assess long-term impact or clinical outcomes (e.g., immune markers), the study demonstrated that Food-Grown® Zinc yeast is a preferred form for supplementation.
Further reading
For further reading, the full study reference: Vinson, J.A. et al. (1989). Comparative human bioavailability of zinc from zinc sulfate, zinc gluconate and zinc incorporated yeast. Chemical and Biological Aspects, Royal Society of Chemistry, Food Group, Symposium on Trace Elements in the Food Chain:125-127.
