Influence of β-carotene supplementation on carotene content of ovaries of heifers

Kirsche, Brigitta; Schlenzig, M.; Ochrimenko, W. I.; Flachowsky, Gerhard

doi:10.1080/17450398709428265

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The yellowish color of the corpus luteum has always been associated with the high presence of β-carotene (Bruggemann and Niesar, 1957;Kirsche et al, 1987) and represents a target of this molecule and its derivatives (Schweigert and Zucker, 1988).…”

Section: Corpus Luteummentioning

confidence: 99%

Carotenoids in female and male reproduction

et al. 2022

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Section: Corpus Luteummentioning

confidence: 99%

Carotenoids in female and male reproduction

et al. 2022

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“…The main sites of beta-carotene deposition and accumulation are the adipose tissue in humans and the liver in most animal species; however, substantial amounts can also be found in the corpus luteum of reproducing animals (e.g. Chew et al, 1984;Kirsche et al, 1987;Rodway, 2000, 2001;Weng et al, 2000;Schweigert, 2003). Table 2 summarises the beta-carotene concentrations in different species in a range of tissues.…”

Section: Tissue Concentrationsmentioning

confidence: 99%

Scientific Opinion on the safety and efficacy of beta‐carotene as a feed additive for all animal species and categories

2012

EFS2

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The use of beta‐carotene is safe for the target animals. Setting a maximum content in feed legislation is not considered necessary. However, this conclusion assumes that triphenylphosphine oxide does not exceed 100 mg/kg additive. In all food‐producing animals (except veal calves) and laboratory rodents, beta‐carotene is almost fully metabolised. In contrast, humans, non‐human primates and ferrets absorb relatively high quantities of beta‐carotene unchanged. Investigations with ferrets and hamsters as well as intervention studies in humans may indicate a certain dose‐dependent potential of beta‐carotene to promote lung carcinoma, particularly in smokers. A systematic literature review and meta‐analysis of nine randomised controlled trials demonstrated an increased risk of lung and stomach cancers in smokers and asbestos workers at dose levels ≥ 20 mg/day. However, increased risk of lung cancer at such doses could be observed only if plasma levels of beta‐carotene exceeded 3 µmol/L. The FEEDAP Panel considers it prudent, in the absence of an acceptable daily intake, that supplemental beta‐carotene in animal feed should not significantly add to consumer exposure from other sources. The use of supplemental beta‐carotene in feeds of food‐producing animals, except veal calves, would not result in a significant additional exposure of consumers to beta‐carotene; however, consumption of liver from veal calves could lead to additional exposure. Beta‐carotene is not an irritant to eyes or skin and is not a skin sensitiser. Respiratory exposure from handling beta‐carotene‐containing additives is considered potentially hazardous. Taking the widespread occurrence of beta‐carotene in nature and its oxidative susceptibility into account, the FEEDAP Panel considered it unlikely that the use of beta‐carotene in animal nutrition at the recommended feed concentrations would pose a risk to the environment. Beta‐carotene is utilised for the synthesis of retinol in almost all animal species except the cat. Effects on reproduction and immunity were not sufficiently demonstrated.

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Untersuchungen zum Energiebedarf bei Holstein-Frisian-Färsen während der Aufzucht und Trächtigkeit unter den tropischen Bedingungen Cubas

Zarragoitia¹,

Gabel

Poppe

1990

Archiv für Tierernaehrung

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In an individual feeding experiment with 48 Holstein-Friesian heifers divided into 3 groups, the effect of various energy levels on live weight development and energy expenditure in the age bracket of 97 days (78 kg live weight) to conception (350 kg LW) and from conception to calving (500 kg LW) was investigated. Rations with differing concentrate--roughage ratios were used. The differentiation of energy intake per day between groups 1 and 2 and group 3 amounted to 7.5% in the 1st development period and to 20% between group 1 and groups 2 and 3 in the 2nd development period. There were significant differences in the live weight gain of 95 g/animal and day in the first development period (up to conception) and of 81 g/animal and day in the second period of development (from conception to calving). Under the tropical climatic conditions the energy expenditure in these studies was approximately 10% under the energy expenditure recommended by the NRC (1978). While there was a clear reciprocal relation between energy expenditure and live weight gain in the first period of development, this relation was less distinct in the second period of development.

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Influence of β-carotene supplementation on carotene content of ovaries of heifers

Cited by 5 publications

References 4 publications

Carotenoids in female and male reproduction

Carotenoids in female and male reproduction

Scientific Opinion on the safety and efficacy of beta‐carotene as a feed additive for all animal species and categories

Untersuchungen zum Energiebedarf bei Holstein-Frisian-Färsen während der Aufzucht und Trächtigkeit unter den tropischen Bedingungen Cubas

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