Leading Nutritional Scientist: Seed Oils Are Not Bad For You! Eating This Twice A Day Will Help Menopause! The Alarming Link Between Chewing & Belly Fat!
The myth-busts, hot takes, explainers, and tools worth keeping.
⚡Myth Buster· 4
⚡Myth Buster35:00
Healthy Snacking Wasn't the Problem—Late-Night Timing Was
In Berry's observational cohort of about 1,000 people, eating frequency within the studied range was not associated with worse outcomes when snacks were healthy. By contrast, she says snacking after 9 p.m. was associated with less favorable measures including abdominal fat, inflammation, and blood lipids, even for healthy snacks; this was an association, not proof that the timing caused those outcomes.
The cohort compared eating habits with multiple health measures
Berry reports no adverse signal from three versus roughly six healthy eating events
About 30% of participants reportedly snacked after 9 p.m.
Late snacking was associated with less favorable health markers
The episode does not establish that 9 p.m. is a universal causal cutoff
“snacking per se wasn't a problem as long as they were healthy foods”
“that was associated with unfavorable Health outcomes”
#snacking#meal timing#chrononutrition#association
⚡Myth Buster1:02:00
Berry's Evidence-Based Rebuttal to Seed-Oil Toxicity Claims
Berry rejects viral claims that modern seed oils inherently cause inflammation, cancer, Alzheimer's disease, or obesity. She argues that rising seed-oil intake is confounded by many simultaneous lifestyle and dietary changes, that proposed omega-6 inflammatory pathways have not translated into harm in human trials, and that randomized-trial meta-analyses generally favor seed oils over saturated-fat comparators. These are Berry's evidence interpretations in the episode, not individualized medical advice.
Concurrent historical trends do not isolate seed oils as a cause
Berry says biochemical and test-tube mechanisms must be checked against human outcomes
She argues that omega-6 fats have not shown the predicted inflammatory harm in controlled human trials
She cites a meta-analysis of roughly 42 randomized trials comparing seed oils with other fats
Her conclusion depends partly on the comparator, especially saturated animal fats
“there is absolutely no evidence that is credible evidence when interpreted in the correct way to show seed oils are harmful”
Why Berry Says Cheese, Yogurt, and Butter Shouldn't Be Grouped Together
Berry argues that dairy is too diverse to receive one health label. She says randomized trials show that ordinary portions of cheese and unsweetened yogurt do not raise cholesterol as butter can, despite similar saturated-fat content, and attributes the contrast partly to fermentation and food structure. Her comments concern typical intakes and do not establish that unlimited cheese is harmless.
Dairy includes liquid, solid, fermented, and non-fermented foods
Fermentation changes the food matrix
Berry reports different cholesterol responses to cheese and butter in randomized trials
She explicitly limits the claim to ordinary portions rather than very high intake
Butter is the less favorable comparator in her account
“Dairy is a diverse food group”
“the butter will increase your cholesterol but the cheese will not”
#dairy#cheese#yogurt#butter#cholesterol
⚡Myth Buster1:21:00
Why High-Calorie Nuts Don't Automatically Cause Weight Gain
Berry says the totality of observational and clinical-trial evidence does not show weight gain when nuts are added to diets. She offers several possible explanations—including incomplete calorie absorption, satiety, microbiome effects, and a blunted blood-sugar response—while acknowledging that healthier overall habits can confound observational findings.
Nut consumers often have lower BMI in observational data, but may also have healthier diets
Berry says clinical trials do not show expected weight gain when nuts are included
She estimates that 20% to 30% of labelled nut calories may not be absorbed
Satiety and other metabolic effects may offset the nuts' high energy density
A package calorie value does not necessarily equal energy absorbed
“the evidence does not support that”
“you only absorb 130 calories”
#nuts#calories#weight#satiety
◆Hot Take· 1
◆Hot Take1:59:30
Berry's Case Against Dismissing Every Industry-Funded Study
Berry argues that industry funding should be disclosed and scrutinized but should not automatically invalidate nutrition research. Based on her university experience, she says funders have limited involvement in design, analysis, and publication, while acknowledging a separate concern: industry may influence which research questions receive funding. This is her account of the system, not proof that every funded study is independent or unbiased.
Government funding for nutrition trials is described as scarce and highly competitive
Berry says universities protect researcher control over analysis and publication
Funding disclosure remains necessary
Agenda-setting is a distinct concern from direct manipulation of results
Each study still requires scrutiny of contracts, methods, data access, and publication rights
“we need to be able to get funding to be able to run studies”
“there is discussion about are they setting the agenda of that research”
#research funding#food industry#conflicts of interest#nutrition science
✶Explainer· 7
✶Explainer26:00
Why Whole-Food Fiber and Added Fiber Are Not Quite the Same
Sarah Berry says UK adults are advised to consume at least 30 grams of fiber but average about 20 grams. She distinguishes soluble and insoluble fiber, argues that whole-food sources provide structural benefits, and still considers added fiber preferable to none.
Berry says most people in the UK do not reach the recommended fiber intake
She describes soluble fiber as relevant to cholesterol absorption and food metabolism
She describes insoluble plant fiber as supporting stool bulk and the gut microbiome
Her hierarchy is whole-food fiber first, while added fiber can still contribute
“we should be getting at least 30 grams of fiber in the UK”
“having any kind of fiber is going to improve our health”
#fiber#whole foods#gut health#microbiome
✶Explainer29:30
What Berry's Six-Week Almond Snack Study Actually Measured
Berry describes a randomized snack-swap study comparing almonds with a specially designed snack reflecting the UK's typical high-sugar, high-saturated-fat, low-fiber snack profile. She says the measured improvement in blood-vessel function was interpreted as equivalent to an estimated 30% reduction in cardiovascular-disease risk; the study did not observe a 30% fall in actual disease events. Berry also discloses Almond Board of California funding and says the funder did not control the study design, data, or pre-publication paper.
Participants obtained 20% of their energy from one of the assigned snack patterns for six weeks
The measured endpoint was flow-mediated dilation, a marker of vascular function
The cardiovascular-risk figure was an interpretation of the marker, not a count of prevented heart attacks
Berry says similar snack-substitution findings have appeared with other nuts
She explicitly discloses the study's industry funding
“can we improve People's Health”
“I have actually had funding from the alma board of California”
How Poor Sleep Can Stack Hunger, Food Choice, and Glucose Response
Berry connects evidence suggesting that short or poor sleep can increase hunger, shift food choices, and worsen the same person's post-breakfast glucose response. She cites the Slumber study, in which short sleepers given sleep-hygiene advice who extended their sleep reduced free-sugar intake without dietary instructions, while carefully noting that some sleep findings are outside her own research.
Sleep duration, efficiency, and timing may affect hunger and fullness signals
Berry says the Slumber study gave sleep advice rather than dietary advice
Participants who extended sleep reportedly reduced free-sugar intake by about 10 grams
ZOE research found a higher post-meal glucose response after a poor night's sleep within the same person
The combined pattern can create what Berry calls a perfect storm rather than one isolated effect
“if you've had a poor night's sleep You Reach For Less healthy food”
“those who were able to extend their sleep actually made healthier choices”
#sleep#hunger#food choice#glucose
✶Explainer1:08:30
The Trans-Fat Detail Behind a Famous Anti–Seed Oil Study
Berry explains why she believes the 1970s Sydney study is often used misleadingly in modern seed-oil debates. The intervention relied on partially hydrogenated products that contained trans fats, so she argues that its worse outcomes cannot be cleanly applied to the non-hydrogenated seed oils commonly consumed today.
The trial involved men who had already experienced a cardiac event
The intervention increased omega-6 intake through products available at that time
Berry says partial hydrogenation generated harmful trans fats
Modern relevance depends on whether the historical product matches today's oil
The segment illustrates how cherry-picking can omit a decisive formulation detail
“the majority of seed oils underwent an industrial process called partial hydrogenation”
Dietary Cholesterol Is Not the Same as Circulating LDL
Berry separates cholesterol eaten in food from cholesterol produced and transported by the body. She says typical dietary cholesterol intake—such as one or two eggs a day for most people—has little effect on circulating LDL, whereas saturated fat can increase liver production and reduce clearance of cholesterol. Her egg example is explicitly bounded and should not be read as universal advice.
LDL and HDL are transport particles carrying cholesterol to different destinations
Berry describes higher circulating LDL as an important cardiovascular-risk factor
She distinguishes food cholesterol from liver production of cholesterol
She says typical egg intake has minimal LDL impact for most people
Saturated fat and highly refined carbohydrate can affect liver cholesterol production
“there are two ways that we can look at cholesterol”
“dietary cholesterol does not impact our circula cholesterol”
#cholesterol#ldl#hdl#eggs#saturated fat
✶Explainer1:38:00
The Menopause Symptom Burden Hidden Behind Hot Flushes
Berry describes perimenopause as a fluctuating hormonal transition that can affect sleep, mood, cognition, body composition, and metabolic measures, not only temperature regulation. In ZOE survey data, she reports that brain fog and other brain-related symptoms were much more common than hot flushes, while emphasizing the broad burden women experience rather than reducing menopause to one symptom.
Berry defines menopause as one year after the last menstrual cycle
She says the transition commonly begins years earlier and can last from two to ten years
In ZOE data, 99% of surveyed perimenopausal women reported at least one symptom
She reports brain-related symptoms in roughly 85% and hot flushes in about 40%
Survey prevalence describes the studied respondents and does not diagnose an individual
“99% of per menopause or women experience at least one menopausal symptom”
“hot flushers are the one of the least common symptoms”
#menopause#perimenopause#brain fog#women's health
✶Explainer1:51:00
Diet and Menopause Symptoms: Promising Results, Important Limits
Berry says a healthier, Mediterranean-style pattern emphasizing plant diversity and fiber may reduce menopause symptoms, but she clearly distinguishes stronger and weaker evidence. Her ZOE subgroup reported a 35% symptom reduction over 12 to 18 weeks without a control group, while other randomized studies reportedly found a similar reduction near 30%; neither result makes diet a universal replacement for HRT or clinical care.
Berry says HRT can help many symptoms but is not suitable or preferred for everyone
The ZOE analysis followed dietary change without a randomized control arm
She explicitly says the 35% estimate needs controlled replication
She cites randomized Mediterranean-diet studies with a similar approximate effect
Evidence for most marketed menopause supplements is described as weak
“there isn't a one siiz fix it's all there isn't a silver bullet”
Why Caring for Her Mother Outranked Becoming a Professor
Berry says four years caring for her mother through a degenerative neurological condition changed her perspective on ambition and achievement. Although proud of becoming a professor and being the first in her family to attend university, she identifies caregiving as her greatest achievement and now places more weight on relationships, joy, and being a kind person.
Berry took a career break and shared full-time care with her family
Watching her mother lose basic abilities changed what Berry values
She remains proud of her academic achievement without treating it as the highest form of success
Her closing principle is to enjoy the present and avoid overcomplicating life
“all that matters is that you have good relationships that you're finding joy in life”
“what I'm most proud of is the four years that I cared for my mom”