Who benefits most from swapping meat for plant-based alternatives?
The clearest health benefits appear in adults without existing heart disease who replace meat with plant-based meat alternatives. A 2024 meta-analysis of 7 randomized controlled trials (369 adults, 60% female, ages 24–61) found that substituting meat with plant-based alternatives for up to 8 weeks lowered LDL cholesterol by 0.25 mmol/L (about 12%) and total cholesterol by 0.29 mmol/L (about 6%), and reduced body weight by 0.72 kg (about 1.5 lbs) [1]. These effects were strongest with mycoprotein-based alternatives, which cut LDL by 0.37 mmol/L (about 18%) [1]. So if you're an adult with elevated cholesterol or weight concerns, swapping meat for these products could help — but the studies were short-term, so long-term effects are unknown.
However, the benefits may not extend to everyone. A 2024 study using UK Biobank data compared vegetarians who ate plant-based meat alternatives to vegetarians who didn't, and found that consumers had higher blood pressure (130/79 vs. 129/78 mmHg) and higher C-reactive protein (CRP, a marker of inflammation: 1.76 vs. 1.57 mg/L) [4]. They also had a 42% higher risk of depression and a 40% lower risk of irritable bowel syndrome [4]. This suggests that for people already on a plant-based diet, adding these processed substitutes may carry some inflammatory risks — a caution worth noting if you have a history of depression or inflammatory conditions.
Does age or sex change the effect?
Age and sex influence how likely you are to try plant-based meat substitutes, but the evidence on whether they change the actual health outcomes is thin. A 2023 survey of 376 Dutch and Finnish consumers found that willingness to buy meat substitutes was influenced by age, gender, and diet — with younger people and women more open to them [2]. But this is about attitudes, not health effects. The clinical trials in the meta-analysis included both men and women (60% female) and a wide age range (24–61), but none of the studies specifically tested whether the cholesterol or weight benefits differed by age or sex [1]. So while it's plausible that younger people or women might adopt these products more readily, we don't have data showing they get more or less health benefit from them.
One interesting sex-specific finding comes from an economic study: present-biased (i.e., impulsive) female participants were willing to pay less for sustainably produced beef after receiving environmental information, while future-biased participants were more likely to pay a premium for plant-based substitutes [5]. This suggests that how you respond to information about these products may vary by sex and your personal time preferences, but again, this is about purchasing behavior, not physiological effects.
What about baseline health — does it matter if you already have health issues?
Yes, your starting health matters. The meta-analysis showing cholesterol and weight benefits specifically excluded people with cardiovascular disease [1], so if you already have heart disease, we simply don't know if the same benefits apply. On the other hand, a large Finnish cohort study (43,788 adults, 79% men, followed for 29 years) found that even small substitutions of red or processed meat with plant-based foods like whole grains, vegetables, or fruits reduced colorectal cancer risk by about 3% per substitution [3]. This effect was strongest in people who ate below-average amounts of whole grains to begin with — for them, swapping red meat for whole grains cut cancer risk by 8% [3]. So if your baseline diet is low in fiber-rich plant foods, you may get more benefit from making these swaps.
The UK Biobank study adds a caution for people with inflammatory conditions or depression: vegetarians who ate plant-based meat alternatives had higher CRP and a 42% higher depression risk [4]. This doesn't prove cause and effect — it could be that people already prone to depression choose these foods — but it's a red flag worth considering if you have a history of inflammation or mood disorders. The same study found no differences in sodium, sugar, or saturated fat intake between consumers and non-consumers [4], so the risks aren't simply due to worse overall diet quality.
About These Sources
This answer is built on 5 peer-reviewed studies — published from 2022 to 2024, 3 from 2024 or later, 5 in Q1 journals, collectively cited 158 times — selected as the most relevant from 6 studies that passed quality screening, drawn from 59 papers retrieved from a database of over 500 million.
Sources used in this answer
Plant-based meat alternatives and cardiometabolic health: a systematic review and meta-analysis
In a meta-analysis of 7 randomized controlled trials (369 adults, 60% female, ages 24–61), substituting plant-based meat alternatives for meat for up to 8 weeks lowered LDL cholesterol by 0.25 mmol/L (12%), total cholesterol by 0.29 mmol/L (6%), and body weight by 0.72 kg (1%), with stronger effects from mycoprotein-based alternatives.
No meat, lab meat, or half meat? Dutch and Finnish consumers’ attitudes toward meat substitutes, cultured meat, and hybrid meat products
A survey of 376 Dutch and Finnish consumers found that willingness to buy meat substitutes was influenced by country, diet, age, gender, familiarity, food sustainability knowledge, food neophobia, and meat attachment, with flexitarians being a key target group.
Partial substitution of red meat or processed meat with plant-based foods and the risk of colorectal cancer
A pooled cohort study of 43,788 Finnish adults (79% men, 29-year follow-up) found that substituting red meat with vegetables, fruits, or whole grains reduced colorectal cancer risk by about 3% per substitution, with stronger effects (8% risk reduction) in people with low baseline whole grain intake.
Plant‐Based Meat Alternatives Intake and Its Association With Health Status Among Vegetarians of the UK Biobank Volunteer Population
In UK Biobank vegetarians, plant-based meat alternative consumers had higher blood pressure (130/79 vs. 129/78 mmHg), higher C-reactive protein (1.76 vs. 1.57 mg/L), a 42% increased risk of depression, and a 40% reduced risk of irritable bowel syndrome compared to non-consumers, with no differences in sodium or sugar intake.
Consumer willingness to pay for environmentally sustainable meat and a plant‐based meat substitute
An experimental auction study found that present-biased female participants were willing to pay less for sustainably produced beef after information nudges, while future-biased participants were more likely to pay a premium for plant-based meat substitutes.