For years, fishmeal has been the "gold standard" protein source in aquaculture. However, with prices continuously rising, farming costs are under increasing pressure. Recently, yeast hydrolysate has emerged as a functional protein alternative. It can partially replace fishmeal while offering unique "added value" that fishmeal doesn't provide!

1. What Are the Benefits of Yeast Hydrolysate?

✅ Supports Growth as Well as Fishmeal, at a Better Cost

      Studies show that replacing 5%-24% of fishmeal with yeast hydrolysate in shrimp feed does not negatively impact growth. In some cases, it even improves weight gain! Research on species like California perch and crayfish confirms that adding 1%-4% yeast hydrolysate maintains growth performance equal to, or better than, high-fishmeal diets.

✅ Boosts Immunity and Stress Resistance

Yeast hydrolysate is rich in nucleotides and β-glucan—"hidden skills" that fishmeal lacks:

• Significantly increases phenoloxidase and lysozyme activity in shrimp (stronger immune systems).

• Enhances antioxidant capacity in turbot, reducing cell damage.

• Improves stress resistance, leading to longer survival times under low-salinity conditions.

✅ Promotes Healthier Intestines for Better Absorption

      California perch fed yeast hydrolysate showed an increase in intestinal villus height by 77 micrometers—meaning a larger absorption area and better feed utilization. It also boosts digestive enzyme activity for more efficient protein breakdown.

2. Yeast Hydrolysate vs. Fishmeal: At a Glance

3. How to Use It for Best Results?

While yeast hydrolysate offers clear advantages, it's not a simple "more is better" ingredient:

? Replacement Ratio: Recommended 5%-24% for shrimp; around 2%-3% addition for fish.
? Balance is Key: When replacing fishmeal, ensure supplementation with lysine, methionine, and Omega-3.
? Synergy Works Best: Combining it with plant proteins or other fermented ingredients can yield even better results.

4. Conclusion

      Yeast hydrolysate is more than just a "budget-friendly" alternative to fishmeal; it's a functional "nutrition booster"—supporting growth while strengthening immunity and gut health. With fishmeal prices remaining high, it's a smart choice for reducing costs and improving efficiency!

【Pro Tip】When using it for the first time, start with a small inclusion rate, monitor feeding response and growth, and optimize the formula gradually.