Rumen By Pass Vitamin AD3E - Time to Junk Plain Vitamins is NOW

~70 to 98.5% of Vitamins are degraded in Rumen, must switch to Rumen By Pass Vitamins

With the increasing milk productivity of our dairy animals and intensive management systems, role of vitamins in dairy animal productivity & metabolism can’t be overstated.

Advancements in genetic traits over the years, specifically for increased milk production have meant that dairy farmers are handling and managing cows and buffaloes which are increasingly susceptible to multiple metabolic disorders especially during transition phase or in early lactation phase.

Nutrition and especially proper vitamin supplementation helps overcome a number of metabolic diseases such as: Mastitis, Metritis, Retention of Placenta and Milk Fever etc.

Ruminal Degradation of Vitamins

Vitamins are the organic compounds regularly required in small amounts and must be absorbed from the gastro-intestinal tract for vitamins to be effective.

For good health of our precious dairy animals and desired high milk yields, dairy animals need to be fed proper amounts of available minerals and vitamins, however, majority of vitamins supplemented in dairy cows and buffaloes, end up getting destroyed / degraded in the rumen and hence don’t reach small intestine in appreciable quantity.

The purpose of this article is to highlight the fact that significant amounts of Vitamins are Degraded in the Rumen and this fact must be considered while selecting an appropriate vitamin brand for supplementation.

Interestingly, the ruminal destruction / degradation of Fat Soluble Vitamins increases with the increase in concentrate levels in the feed. Sample the following

Evidence of Ruminal Destruction of Vitamins

Ruminal destruction of vitamin A can be extensive. Approximately 60 percent of supplemental vitamin A was destroyed in the rumen of steers fed hay and corn grain diets (Warner et al., 1970).

Similar values have been obtained using in vitro rumen systems (Rode et al., 1990; Weiss et al., 1995). In vitro data suggest that ruminal destruction of vitamin A was approximately 20 percent when cattle were fed high forage diets, but it increased to about 70 percent when cattle were fed diets with 50 to 70 percent concentrate. (Reproduced from NRC 2001, 7th Ed, Chapter 7, Page No. 184)

Various studies* have highlighted that ruminal destruction of Fat Soluble Vitamins ranges from:

Vitamin A: 50 – 75%

Vitamin D: ~ 60%

Vitamin E: 50 – 70%

(* - details available upon request)

Its not that only Fat Soluble Vitamins get destroyed / degraded in the Rumen, even B-Complex Vitamins too get degraded, some at even higher rates than Vitamin A, D3 or E as highlighted below:

Disappearance rates of B-vitamins before the duodenal cannula following dietary supplementation in study 1**


Disappearance (%) SE

Thiamin 67.8 8.9

Riboflavin 99.3 1.7

Niacin (as nicotinamide) 98.5 1.8

Vitamin B6 (as pyridoxine) 41.0 8.9

Biotin 45.2 37.7

Folic acid 97.0 0.5

Vitamin B12 62.9 7.5

(** - Fate of Supplementary B-Vitamins in the Gastrointestinal Tract of Dairy Cows – D E Santschi, J. Dairy Sc. 88, 2043: 2054)

Stability, Interactions and Shelf Life of Plain Vitamins

If the ruminal destruction / degradation of Plain Vitamins being marketed in India wasn’t enough, the existing plain vitamins are severely impacted by temperature, humidity and storage conditions after opening the original pack and hence must be used immediately.

Yet another drawback with the existing plain Vitamins (Vit AD3E in particular and other vitamins in general) is the widely reported chemical interactions with the macro-minerals as well as trace minerals. This aspect is well documented and must be considered by feed formulators while choosing products.

The “not so reported / not mentioned” on pack – shelf life of a leading MNC’s Vitamin AD3 or Vitamin AD3E only lends credence to the fact that plain Vitamin AD3 or AD3E combo has very short shelf life owing to its environmental instability

Cost of Plain Vitamins

In view of the forgoing, it may only be sound scientific rationale to use, now available, Rumen By Pass Vitamin AD3E (Microtinic AD3E from VETAGRO) – which largely by passes the rumen and is absorbed from small intestine.

The last argument against Rumen By Pass Vitamins esp. Vit. AD3E or By Pass Niacin could only be the cost of inclusion considerations.

Here again, By Pass Vitamin AD3E (Microtinic AD3E – VETAGRO) as well as By Pass Niacin (Microtinic PP – VETAGRO) score handsomely over the existing plain, non-by pass vitamins since both Rumen By Pass Vitamins are available at slightly to significantly lower prices than plain, wasteful, short shelf life Vitamin AD3 or Vitamin AD3E

Uniform Mixing with Rumen By Pass Vitamins

By virtue of being micro-encapsulated so as to be Rumen By Pass – Microtinic AD3E as well as Microtinic PP further offer following additional advantages over plain vitamins:

  • No dustiness

  • Ensure uniform mixing as these products are not powders but free flowing small globules

  • Extreme ease of handling and no risk for any factory workers

  • Precise dosage is possible

  • No chemical interactions with any minerals or any other feed ingredients

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