Health‑Promoting Phytonutrients Are Higher in Grass‑Fed Meat and Milk

Summary

This narrative review synthesises evidence on the phytochemical composition of meat and milk derived from pasture-fed ruminants, arguing that the botanical diversity of grassland diets transfers bioactive compounds — including carotenoids, tocopherols, and polyphenols — into animal products at higher concentrations than grain-based feeding systems. The authors situate these findings within a soil–plant–animal–human health continuum, suggesting that grazing management practices which support plant diversity may indirectly benefit consumer health. The review draws on a broad international literature, though primary data are largely from North American and European contexts.

UK applicability

The findings are broadly applicable to UK pasture-based livestock systems, where grass-fed and mixed grazing are common production models; the evidence supports policy and marketing arguments for high-welfare, extensive grazing systems as a means of enhancing the nutritional profile of UK beef and dairy.

Key measures

Phytonutrient concentrations (terpenoids, carotenoids, polyphenols, tocopherols, omega-3 fatty acids) in meat and milk (mg/kg or µg/100g); comparison of grass-fed vs. grain-fed systems

Outcomes reported

The paper examines concentrations of health-promoting phytonutrients — including terpenoids, polyphenols, and carotenoids — in meat and milk from grass-fed compared with grain-fed ruminants, reporting that pasture-based diets are associated with higher levels of these bioactive compounds in animal products.

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