



CASTA® LIQUID
CASTA LIQUID® enhances blood calcium, supports smoother calving transitions, and optimizes phosphorus balance — by binding dietary phosphorus and activating bone mineral release.

Safe and approved for dairy cows

Liquid form is easy to integrate into close-up rations

Binds dietary phosphorus to support calcium mobilization
Product Description
Casta® Liquid is a precision liquid phosphorus binder for pre-fresh dairy cows, built on Protekta’s patented CaRT® system — the same proven technology behind X-Zelit®. It is designed for the critical final 14–21 days before calving to help cows transition smoothly into lactation.
By reducing available dietary phosphorus in the rumen, Casta® Liquid triggers a controlled drop in blood phosphorus. This reduces secretion of the bone hormone FGF23, encouraging the natural release of calcium and phosphorus from bone reserves before calving. The result is more stable blood calcium levels at calving, helping to lower the risk of milk fever and subclinical hypocalcemia, while supporting fresh cow performance and health.
Application
- Close-up (pre-fresh) dairy rations
- Daily during the final 14–21 days before calving
- As part of a consistent transition cow program
- 2.1–4.0 lbs per cow per day (as-fed, based on dry matter intake and diet phosphorus level)
- Casta Liquid® provides the proven benefits of CaRT® in a convenient liquid format — no bags to handle, and even distribution across the TMR.



Want to Use STALOSAN® F on Your Farm?
Talk to the Protekta team to locate a local dealer or get usage advice.
