Our Verdict
The most rigorously tested option. Heart & Soil's Grass-Fed Colostrum passed all Informed Sport contamination and banned-substance testing — a rare distinction in this category. They didn't pursue final certification because many sporting bodies advise against colostrum for athletes due to IGF-1 content (this is a category-wide regulatory issue, not a product flaw). Premium price reflects the testing rigor. The closest thing to a Sport-certified colostrum on the US market.
Evident Ratings
Heart & Soil Heart & Soil Grass-Fed Colostrum
Scored across 5 dimensions on a 5-point scale
About Heart & Soil
Heart & Soil is a small ancestral-nutrition brand co-founded by Dr. Paul Saladino, focused on whole-food animal supplements including organ meats and colostrum.
See how Heart & Soil stacks up against every colostrum we tested
Our full colostrum comparison ranks every brand across the same scoring dimensions you saw above — formulation, testing, trust, value, and sourcing.
See Best Colostrum →Other top colostrum we tested
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