A-Max® Research

Dairy Research – Vi-COR®

The Effects of A-Max® Yeast Culture and Diamond V Yeast Culture on Feedstuff Digestion and Ruminal Fermentation

Introduction: Yeast culture additives have been used in ruminant nutrition to manipulate rumen fermentation and, therefore, production response. Many commercial yeast based products are currently being used for this purpose. In this study two such products are compared.
Conclusion: Inclusion of A-Max led to beneficial changes in ruminal metabolism which may result in increased production efficiency in beef and dairy cattle. Particularly, simulation of the lactic acid utilizing bacteria by A-Max would be a significant benefit for the ruminants consuming diets with high levels of cereal grains to alleviate lactic acidosis.
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Dairy Research – West Virginia University

The Effect of A-Max Yeast Culture and Diamond V Yeast Culture on Microbial Metabolism in Continuous Culture

Introduction: Dietary inclusion of yeast culture has been shown to improve DMI and milk production in early-lactation dairy cattle. Although, these production responses are cited, the specific mode of action remains elusive. There are several yeast products on the market with nuances in their manufacturing process that may have an influence on performance; however, very few studies have been conducted to compare yeast culture in the same experimental environment.
Conclusion: A higher pH at critical times after feeding (i.e.2h) promotes a healthier rumen. The higher protein content in microbes fed A-Max indicates these bacteria would be of greater nutritional value to the host than those from Diamond V. In a lactating cow diet (DMI:54 lb/ d), A-Max supplemented diets would produce 256 g more microbial protein than Diamond V supplemented diets, which would be equivalent to approximately .7 lb of fishmeal/ cow/ d or $.32/ cow/ d assuming a $900/ ton value for fish meal.
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The Effect of A-Max Yeast Culture Concentrate (Two Ounce) vs A-Max Yeast Culture Xtra (One Ounce) on Microbial Metabolism in Continuous Culture of Rumen Contents

Introduction: A-Max Concentrate has shown to be efficacious in enhancing rumen metabolism and milk production in lactating-cow studies. Its inclusion rate is 2 oz./ h/ d. Cost savings can be incurred if the product is concentrated and fed at 1 oz./ h/ d, which includes the same active ingredients.
Conclusion: A-Max XTRA fed at 1 oz./ h/ d can replace A-Max Concentrate, fed at 2 oz./ h/ d with an equal effect on rumen microbial metabolism.
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The Effect of A-Max Yeast Culture Xtra (One Ounce) vs A-Max Yeast Culture Ultra (One-Half Ounce) on Rumen Microbial Metabolism in Continuous Culture

Introduction: The inclusion of smaller amounts of supplemental feeds is always a high priority. It also reduces inventory and shipping costs. There is a specific amount of A-Max fermentate that is needed to positively affect cow performance; however, the inclusion of smaller amounts of carrier may be possible to reduce the total quantity of product. A-Max has a unique carrier such that it is porous and it can adsorb a high proportion of the liquid fermentate. Thus widening the carrier to fermentate ratio may allow a reduction of product inclusion with similar efficacy. This was the case with A-Max Concentrate and A-Max XTRA (2 oz./ cow/ d vs. 1 oz./ cow/ d).
Conclusion: The carrier to liquid fermentate ratio used to manufacture A-Max can be widened such that a .5 oz./ cow/ d product (A-Max ULTRA) has the same efficacy in the rumen as a product fed at 1 oz./ h/ d (A-Max XTRA).
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Dairy Research – UC Davis / University of California

The Effect of Feeding A-Max Yeast Culture on Performance of High-Producing Dairy Cows in Summer Heat Stress

Introduction: Yeast and yeast culture additives have been used in ruminant nutrition to manipulate rumen fermentation and, therefore, production response. The response in milk production to yeast culture additives is usually in the 2 to 3 lb. range; however, very few studies have found this level of difference to be significant. In addition, it has been suggested that yeast culture may improve production and reproductive performance during hot weather.
Conclusion: Cows receiving A-Max yeast in hot ambient temperatures increased milk production by 1.2 kg (2.6 lb) with a .047/ cow/ day reduction in fat percentage but not yield. No other percentages were affected, however milk component yields were increased. The addition of A-Max had a positive affect on foot health.
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Dairy Research – Spruce Haven Research Farms

A Comparison of A-Max Yeast Culture Concentrate and Diamond V XP Yeast Culture on Milk Production in Dairy Cows

Introduction: Feeding yeast to dairy cattle has become common place. Yeast cultures: the media and nutrients produced after the yeast have been fermented on a specific substrate. It contains some live yeast cells, however, the counts are usually variable and not guaranteed. In addition, the degree to which the yeast itself has been fermented on the substraight will dictate the relative proportion of yeast cells and media (substrate) that will be present in the product. In addition, the type of drying process and/ or final product preparation (extrusion) can dictate the total count and viability of the yeast in the final product.
Conclusion: A-Max Concentrate performed equally and numerically better than Diamond V XP in milk production. Assuming a $13.00/ cwt of milk, feeding A-Max would result in $.22/ cow/ day more return than feeding Diamond V.
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The Effect of Custom-Blend Yeast Product (CBYP) vs Diamond V XP on Milk Production Performance in Lactating Dairy Cattle

Introduction: Yeast and yeast culture additives have been used in ruminant nutrition to manipulate rumen fermentation and, therefore, production response. Many commercial yeast based products are currently being used for this purpose. In this study, two such products are compared.
Conclusion: Cows supplemented with Diamond V XP and Vi-COR CBYP produced similar amounts of milk and milk components.
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The Effect of Yeast Culture (YC, A-Max) on Production Performance in Dairy Cattle

Introduction: Yeast and yeast products have been used in ruminant nutrition to manipulate rumen fermentation and, therefore, production response. Many artificial rumen fermentation studies have shown influence of yeast products on composition and metabolic activity of the intestinal microflora which could result in higher production response.
Conclusion: Cows supplemented with A-Max produced more milk, FCM and ECM than non supplemented cows. Fat, protein, and SNF yields were higher for A-Max supplemented cows compared to Control.
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