Nutrition Facts with Dr. Greger

Plant-Based Kids (Part 1)

November 20, 2025

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  • Well-balanced plant-based diets during pregnancy are associated with a significantly lower risk of developing gestational diabetes and a 20% lower risk of hypertensive disorders like preeclampsia. 
  • Professional nutrition associations globally hold varying stances on vegan diets for children, ranging from supportive (if well-designed) to cautious or dismissive, though the Academy of Nutrition and Dietetics supports them for all life stages when well-planned. 
  • Studies suggest vegetarian children may have higher IQs, though confounding factors exist, and population data indicates vegetarian diets are associated with a lower prevalence of obesity in children. 

Segments

Introduction and Guest Focus
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(00:00:14)
  • Key Takeaway: Dr. Christine Dennis, a plant-based parent and senior research scientist, is featured to discuss research on raising plant-based children.
  • Summary: The episode of Nutrition Facts with Dr. Greger introduces Dr. Christine Dennis, who will delve into research concerning plant-based children. The initial focus highlights how plant-based diets during pregnancy can reduce risks of gestational diabetes and preeclampsia. Scientific associations have issued varied position papers regarding vegan diets across crucial life stages, including pregnancy and childhood.
Professional Stance Variation
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(00:01:00)
  • Key Takeaway: Professional nutrition and pediatric associations show significant divergence in their official statements regarding the suitability of vegan diets for children and during pregnancy.
  • Summary: While some associations, like the American Dietetic Association, firmly support well-designed vegan diets for normal growth, others are more reserved or caution against them for children. Supportive opinions come from associations in Canada, Australia, and broader Europe, whereas dismissive positions have been issued by groups in countries like Slovenia, France, and Belgium.
Clinical Trial Data Gaps
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(00:01:43)
  • Key Takeaway: A lack of clinical trial data on pregnant women, often due to ethical concerns about fetal harm leading to exclusion from research, paradoxically results in less evidence to ensure safety.
  • Summary: Pregnant individuals are largely excluded from clinical trials due to fears of fetal harm, sometimes requiring reproductive-age women to commit to contraception. This exclusion leads to a deficit of clinical trial data, which some argue may not have made mothers or babies safer. This data gap is also cited as a concern when evaluating vegan diets for children, as existing studies often come from vegetarian children and vary in quality.
Defining Well-Planned Vegan Diets
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(00:02:45)
  • Key Takeaway: A well-planned vegan diet, deemed suitable by the Academy of Nutrition and Dietetics for all life stages, requires a wide variety of whole plant foods plus supplementation of B12, DHA, calcium, vitamin D, and iodine.
  • Summary: A well-planned vegan diet must be rich in grains, legumes, fruits, vegetables, nuts, and seeds, while limiting vegetable fats that displace nutrient-dense foods. Critical nutrients requiring attention include ensuring sufficient intake of calcium and vitamin D, taking a DHA supplement, and reliably sourcing vitamin B12. Iodine supplementation is also necessary during pregnancy and breastfeeding.
Maternal Health Benefits
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(00:03:54)
  • Key Takeaway: Adopting a healthy plant-based diet during pregnancy significantly lowers the risk of gestational diabetes and reduces the risk of hypertensive disorders like preeclampsia by 20%.
  • Summary: Gestational diabetes affects about 14% of pregnancies globally and is linked to adverse outcomes and long-term cardiometabolic risk for both mother and baby. Plant-based diets positively impact blood sugar control, leading to a lower incidence of gestational diabetes. Furthermore, reduced risk of hypertensive disorders during pregnancy is associated with a lower lifetime risk of stroke for the mother.
IQ and Vegetarian Children
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(00:05:07)
  • Key Takeaway: Vegetarian children tested about 16 IQ points higher than average, but longitudinal research suggests smarter children are more likely to adopt vegetarianism later in life.
  • Summary: Initial testing showed vegetarian children scored significantly higher on IQ tests, with their mental age exceeding their chronological age by about a year. Researchers controlled for confounding factors, noting that more educated parents might pass down both diet and intelligence. A UK study following 8,000 children over decades found that smarter children had an increased likelihood of becoming vegetarian as adults.
Growth and Obesity in Children
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(00:06:35)
  • Key Takeaway: While restrictive macrobiotic diets can cause stunting, well-managed vegan diets do not negatively impact height when age disparities in studies are accounted for, and vegetarian diets correlate with lower childhood obesity rates.
  • Summary: Some studies show children on restrictive macrobiotic diets suffer growth stunting, while others suggest plant-based children may be taller. A systematic review found that height disparities in vegan children disappeared once a study with a significant age difference between vegan and non-vegan groups was removed. Population studies consistently link vegetarian diets to a lower prevalence of obesity in children.
Closing Information
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(00:07:23)
  • Key Takeaway: All proceeds from Dr. Greger’s books support charity, and the NutritionFacts.org website offers free, non-commercial, science-based content.
  • Summary: Listeners can find links to podcast videos, sources, and notes at nutritionfacts.org/audio. Information on his books, including How Not to Die, is available at nutritionfacts.org/books, with all proceeds going to charity. The website provides free content without ads or corporate sponsorship as a public service.