Eating more plant protein may promote healthy aging in women

Evan Walker
Evan Walker TheMediTary.Com |
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A new study shows women who eat more plant protein are likely to age healthily and lower their risk of chronic conditions. Lumina/Stocksy
  • A new study found that women who include enough protein, particularly plant protein, in their diet are likely to remain healthy as they age.
  • Healthy aging is not just about adding years to the lifespan but living healthily without chronic conditions.
  • A diet high in minimally processed, whole foods is recommended for maintaining physical and mental health during older age.

An estimated 15% of the population in the United States is currently older than 65, but that percentage is expected to increase to almost 25% by 2060.

In 2018, around 27% of people over 65 had multiple chronic health conditions, and by 2050, research suggests the majority of people 50 and older will have one or more chronic health conditions.

The risk of chronic conditions, such as hypertension, diabetes mellitus, cancer, chronic obstructive pulmonary disease (COPD), and coronary heart disease, can be mitigated through diet and lifestyle changes.

A new study from Tufts University in Boston suggested that including more protein, particularly plant protein, in a dietary pattern during midlife is linked to healthier aging in females.

The study, led by researchers at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA), was published January 17 in The American Journal of Clinical Nutrition.

Kelsey Costa, a registered dietitian nutritionist and nutrition consultant for the National Coalition on Healthcare, not involved in the study, commented on the findings to Medical News Today:

“There is a strong connection between protein consumption during midlife and the probability of aging healthily. The research indicates that plant protein is the most effective in promoting healthy aging and maintaining a positive health status.”

Although eating protein in any form in midlife was associated with healthier aging, plant protein seemed to have a greater beneficial effect, as Andres Ardisson Korat, a scientist at the HNRCA and lead author of the study, explained to MNT.

“Those who consumed greater amounts of animal protein tended to have more chronic disease and didn’t manage to obtain the improved physical function that we normally associate with eating protein,” Korat said.

In 1984, plant-based protein was defined as protein from:

  • bread
  • vegetables
  • fruits
  • pizza
  • cereal
  • baked items
  • mashed potatoes
  • nuts
  • beans
  • peanut butter
  • pasta

The researchers found that women who got more protein from these items were 46% more likely to remain Healthy into older age.

By contrast, those who obtained most of their protein from animal sources — meat, milk, fish and other seafood, and cheese — were 6% less likely to be healthy as they got older.

Costa suggested how protein might affect health as we age.

“The impact of protein intake on Healthy aging is influenced by various intricate and interrelated factors that we have yet to fully comprehend,” she said.

“As suggested by the study authors, preliminary evidence indicates that dietary protein and physical activity stimulate the activation of the mammalian target of the rapamycin complex 1 (mTORC1) signaling pathway, which seems to decline with age, boosting muscle protein synthesis and improving physical function in older adults,” Costa noted.

The authors note that the study did have limitations — the cohort was predominantly white and female, so the findings may not apply to other populations. In addition, all the data was taken from self-reported questionnaires, with some time lag, so there may be some bias in the data.

They also acknowledge that they “cannot discount the contributions of other components of those foods that contributed to plant protein intake.”

However, it was a large cohort, and the participants were observed over a long time period.

Costa advised that everyone can benefit from increasing their intake of plant foods.

“For healthy aging, consider adopting a predominantly plant-based eating regimen, such as the Green Mediterranean diet or any other balanced, plant-focused diet. Minimize the intake of animal-based foods while emphasizing the consumption of wholesome, plant-derived foods.”

However,” she warned, “don’t rely on ultra-processed ‘plant-based’ food products that contain minimal whole foods and are high in sodium, refined oils, and added sugars.”

“Instead, opt for predominantly low-processed versions of whole grains, legumes, fruits, vegetables, nuts, and seeds, and include some healthy processed foods like tofu, precooked lentils, or chickpea pasta,” she advised.

“Include nutrient-rich berries and dark, leafy greens in your daily meals, along with omega-3-rich foods like flaxseeds and walnuts. These foods are associated with reduced inflammation and improved cognitive function, important aspects of healthy aging.”

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