Ruminant

Goal: TG ® 3 FA + glycerol (propionate - absorbed)

In rumen FFA attach to fiber particles

Block cellulase from attacking b -1,4 bonds

Increase TG in diet decreases fiber digestion

Process:

1. TG released from fiber particles in acid (HCl) of abomasum

2. bile in duodenum

3. formation of micelle

4. absorbed

5. chylomicron - to lymph (most absorbed FA to adipose)

**Most FFA content of adipose does NOT represent dietary FA.

Redox State in Rumen:

Rumen is highly reduced

Unsaturated FA ® saturated (reduction) in rumen environment

60% of unsat. ® sat.

2/3 of FA in beef fat = stearic acid (C18:0) = saturated

linoleic ® stearic ® reduction