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Red meat dietary research ‘skewed’, independent review finds!

Red meat dietary: We all know that our body needs protein and for a long time red meat has been introduced as a main source of protein for our body and a lot of research has been done in this field.

An independent review of evidence on the contribution of red meat to adult nutrition and health has highlighted that large amounts of research are “skewed towards observational studies” that do not provide a fair, or clear assessment of the benefits and risks of meat-containing diets.

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Red meat dietary research

Red meat dietary research

The review, published earlier this month in the International Journal of Animal Biosciences, says red meat is a nutrient-dense food that has been a critical part of human diets for millennia and contributed to the evolutionary development of the human brain.

Red meat dietary, However, in today’s “often polarised debate”, the nutritional value of red meat is often overlooked or forgotten.

Since the start of the new millennium red meat has become the main dietary target of climate campaigners aiming to minimize the impact of humankind on the environment by persuading millions to adopt plant-based or vegan diets.

Despite this, scientific evidence shows that red meat is a source of high-quality protein, micronutrients, and essential fatty acids.

“While individuals may benefit from avoiding excessive meat consumption or choosing less processed meats, embracing a diet devoid of animal foods is not risk-free from a nutrition or health perspective.”

Red meat dietary, The researchers also noted that the nutritional risks of meat-free diets were “rarely acknowledged” and said should be further studied.

They also concluded that as long as nutrient intakes remain adequate for health, it should be up to personal choice to determine whether or not red meat is included in the diet.

Evidence supporting red meat in healthy diets

The authors said the available evidence demonstrates that red meat is nutrient-dense and makes an important contribution to adults’ diets.

Raw red muscle meat typically contains 20-25g of protein per 100g.

However, cooking increases the protein density to 28-36g per 100g due to a water loss of around 30 percent.

The digestibility of the protein in meat is remarkably high at around 94 percent, significantly surpassing the digestibility of beans at 78pc and whole wheat at 86pc.

Additionally, meat protein supplies all nine essential amino acids.

Vitamin B12, of which red meat is a uniquely valuable nutritional source, plays vital metabolic roles throughout a person’s life, with special importance during pregnancy and early development (the initial 1,000 days of life).

Current evidence linked a deficiency in vitamin B12 to an increased susceptibility to a range of neurological, vascular, immune, and inflammatory disorders.

Studies also underscored the importance of red meat consumption in maintaining iron status, particularly for pre-menopausal women who have the highest daily iron requirements as a consequence of menstruation.

Research also highlighted the essential role of red meat consumption in bolstering both iron and zinc bioavailability, making it a valuable dietary choice for individuals seeking to optimize micronutrient absorption and maintain overall health.

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Nutrition and health claims

Strict guidelines govern the use of nutrition and health claims in commercial communications for foodstuffs in the UK and Europe, the study noted.

Within these strict parameters, authorized nutrition claims that can be made specifically for beef according to the scientific evidence is that it is rich in Niacin, vitamins B6 and B12, zinc; a source of Iron, potassium, phosphorus, riboflavin; while also being high in protein and naturally low in sodium.

Red meat dietary, Numerous authorized health claims that can be made for red meat include:

  • Growth and maintenance of muscle mass,
  • Maintenance of normal bones,
  • Immunity support,
  • Energy-yielding metabolism,
  • Reduction of tiredness and fatigue,
  • Normal mental function,
  • Maintenance of normal skin,
  • Maintenance of normal hair and nails,
  • Maintenance of normal vision
  • Supports the normal formation of red blood cells, and
  • Fertility and reproduction.

Red meat dietary research 2

Despite benefits, red meat consumption in UK declining

Despite the evidence supporting the role of red meat in healthy diets, the study noted that red meat consumption in the UK is declining.

According to the UK’s National Diet and Nutrition Survey (NDNS), since 2008, mean consumption of red meat has reduced by 13g/day, 23g/day, and 19g/day for those aged 11-18 years, 19-64 years and ≥65 years respectively, with women eating significantly less red and processed meat than men.

Research is also showing that adolescents and some adults in the UK have inadequate intakes of several nutrients found in red meat.

Red meat dietary research

The authors noted that the potential risks associated with high red meat consumption in relation to chronic diseases have garnered significant attention, but these were largely based on observational studies which were vulnerable to confounding from other diet and lifestyle factors that influence disease risk.

“For example, high red meat intakes are associated with low intakes of fruits, whole grains and nuts, and high oil intakes of oil which would be expected to influence disease risk.”

They also noted that while some recent systematic reviews and meta-analyses, based on observational data, had reported positive associations between higher red and processed meat consumption and cancer incidence, CVD, and type 2 diabetes, similar analyses had reported clinically insignificant associations with chronic disease risks or clear differences between the risks attributed to lean versus processed meats or between meat subtypes.

“In a systematic review and meta-regression, unprocessed red meat had a weak association with colorectal cancer, breast cancer, type 2 diabetes, and ischaemic heart disease, and no association with ischaemic stroke or hemorrhagic stroke.”

The review also noted that vegan diets may pose challenges for older adults in terms of muscle mass and strength preservation.

Animal-based proteins tend to have superior protein quality and anabolic potential, specifically for whole-body anabolic efficiency, compared with plant-based proteins.

Further study of meat-free diets needed

Red meat dietary, The review concluded that a wholesale shift to plant-based diets may not benefit adults who are vulnerable to sub-optimal nutrient intakes, such as women of childbearing age and the elderly, and called for further study.

“Future research should reduce confounding and bias by testing lean red meats within a balanced diet against meat-free diets to determine benefits and risks.”

Source: sheepcentral


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