I Spent 30 Years Telling Patients This — I Was Wrong

Added: 2026-05-28

[00:00:00]I have spent the better part of a medical career giving patients advice I believed completely advice that came from the guidelines I was trained on the consensus positions of the institutions I respected and the clinical frameworks I was taught to trust and some of that advice advice I repeated thousands of times across thousands of consultations was wrong not recklessly wrong not negligently wrong in the specific way that medicine is periodically wrong confidently, systematically, and at scale because the evidence base had not yet caught up with the biology. The hardest part of practicing medicine for long enough is watching the ground shift under positions you held with certainty.

[00:00:43]Watching recommendations you repeated without hesitation get quietly revised, retracted, or replaced with something that contradicts them directly. watching patients who followed the advice, who did everything right by the standards of the time, end up with outcomes the advice was supposed to prevent. There are four pieces of advice in particular that I gave patients for years that the evidence has since overturned, qualified, or complicated in ways that materially change what the correct clinical guidance should be. I am not going to soften this or frame it as nuance or emerging science. These were things I told patients with confidence.

[00:01:20]The research now tells a different story. And I think the people who received that advice or who are still receiving it from well-meaning doctors working from the same outdated frameworks deserve to hear the correction from someone willing to say clearly I was wrong. Here is what the evidence actually shows. Hi, I'm Dr. Alec. I'm an emergency medicine doctor with nearly 10 years in the ADE. And what I've learned over that time, perhaps more than any specific clinical skill, is that medicine is a discipline that updates itself and that updating yourself along with it requires a willingness to hold your prior certainties loosely. The doctors I most respect are not the ones who have never been wrong. They are the ones who recognize it when they are say so clearly and change. My goal with this channel is to bring that same honesty to the people on the other side of the consultation. the patients who deserve to know when the advice has changed and why. If you are watching this, there is a reasonable chance that something a doctor told you perhaps years ago, perhaps recently, is sitting uncomfortably against something you have read or observed since. You may have been following advice that felt right at the time, but has not produced the outcome you expected. Or you may simply want to understand which parts of mainstream medical guidance are on solid evidence and which are standing on foundations that the research has been quietly eroding. Either way, I think this video will give you something useful. I want to take a few seconds to make you a promise. I promise to keep creating the most honest evidence grounded content I can, including as today content that requires me to acknowledge where the guidance I once gave has turned out to be incomplete or incorrect. All I ask is that you give this channel a chance and hit subscribe.

[00:03:11]If you reach the end of this video and have not found it genuinely valuable, feel free to unsubscribe. No hard feelings at all. But if you give me your time and attention, I will give you everything I have learned from over a decade on the front line of medicine, including the parts that have required me to change my mind. Please help me out, hit subscribe, and help this channel reach more people who deserve this level of honesty. And let's get into it. Before I walk through the specific advice I got wrong, I want to spend a few minutes on something that I think is genuinely important to understand. how confident widely shared medical positions end up being incorrect. Not because the doctors giving them were careless, but because of how evidence accumulates and how long it takes for new findings to change established clinical practice. Medicine operates on a hierarchy of evidence. At the top sit large randomized controlled trials and metaanalyses. Systematic reviews that pull data across multiple studies to identify patterns more reliably than any single trial could. At the bottom sit case reports, clinical anecdotes, and expert opinion. In between lies a large body of observational and epidemiological research studies that track populations over time and identify statistical associations between variables and health outcomes. The problem is is that a significant portion of the dietary and lifestyle guidance that entered clinical practice in the latter half of the 20th century was built not on randomized trials which extremely difficult and expensive to conduct in nutrition and lifestyle research but on observational epidemiology, expert consensus and in some cases industry-f funded research that had its own interest to protect.

[00:04:57]When the higher quality evidence eventually arrives, when the randomized trials are done, when the mechanistic biology is understood at a cellular level, when the long-term population data is analyzed more rigorously, it sometimes confirms the original guidance and sometimes it does not. The process by which clinical guidelines update to reflect new evidence is slow. A major trial may be published in a leading journal and then take 5 to 10 years to materially change what a GP tells a patient in a routine consultation.

[00:05:31]Because guideline revision requires committee consensus, institutional endorsement, and professional education, all of which operate on timelines that the pace of research frequently outruns.

[00:05:43]What this means in practice is that the gap between what the best current evidence supports and what most patients are routinely advised is almost always larger than it should be. Not because anyone is acting in bad faith, but because the system of translating evidence into practice is slow, conservative, and sometimes resistant to positions that require institutions to publicly revise what they have previously said with authority. I say all of this not to undermine confidence in medicine. The overall trajectory of medical knowledge is one of genuine and remarkable progress, but to explain why it is possible for a conscientious, well-trained clinician to spend years giving advice that turns out to be wrong and why patients deserve to have those corrections communicated directly, not buried in guideline footnotes or softened into unrecognizable nuance.

[00:06:35]With that context, let me tell you what I got wrong. Just really quickly, if you're finding this useful so far, please consider subscribing to the channel. It genuinely helps these videos reach more people who need this information. Anyway, let's continue. So, let me name these directly. Four pieces of advice, each one I gave with confidence. Each one has been materially contradicted or significantly revised by evidence that has accumulated since. The first is dietary fat, specifically saturated fat as the primary driver of cardiovascular disease. For decades, the dominant framework in cardiovascular prevention was the diet heart hypothesis. That saturated fat raises LDL cholesterol, that LDL cholesterol causes heart disease, and that therefore reducing saturated fat reduces heart disease. This framework drove a generation of low-fat dietary advice, and I repeated it consistently. Eat less fat. Switch to low-fat dairy. Avoid red meat and eggs. The evidence for this recommendation was never as strong as the confidence with which it was delivered. The seven country study which provided much of the original epidemiological foundation has since been shown to have significant methodological problems including selective data in and the large randomized trials that were conducted to test the diet heart hypothesis directly including the women's health initiative.

[00:08:02]One of the largest dietary intervention trials ever conducted did not find that reducing saturated fat reduced cardiovascular events. What the subsequent research revealed is considerably more nuanced. Research published in the Annals of Internal Medicine pulling data from 76 studies found no significant association between total saturated fat intake and cardiovascular risk. What matters is not whether fat is saturated but what it replaces or is replaced by in the diet.

[00:08:33]Saturated fat replaced by refined carbohydrates produces no cardiovascular benefit and may worsen metabolic risk.

[00:08:42]Saturated fat replaced by unsaturated fat from whole food sources produces a modest benefit. The low-fat dietary advice that followed from the diet heart hypothesis pushed millions of people toward precisely the wrong replacement.

[00:08:56]Low-fat products loaded with refined sugar and processed carbohydrates.

[00:09:01]Research published in JAMAMA Internal Medicine has documented how the sugar industry funded research in the 1960s, specifically designed to deflect attention from sugar and toward fat as the cardiovascular villain. We built a generation of public health guidance on a foundation that was at least in part commercially corrupted. And the patients who followed it faithfully traded one risk for another without knowing it. I told patients to reduce saturated fat.

[00:09:29]The evidence now tells me that the more important conversation was about reducing refined carbohydrates and processed food, the actual dietary drivers of metabolic cardiovascular risk. That conversation happened far too rarely for far too long. The second piece of advice I got wrong is the framing of cholesterol as a simple binary risk factor. High is bad, low is good, and a statin will fix it. I have discussed in previous videos the limitation of LDL cholesterol as a risk marker and the superiority of apo particle count for predicting atherosclerotic risk. What I want to address here is the broader clinical framing I once used that getting LDL below a certain threshold was the primary objective of cardiovascular prevention and that achieving that threshold with a statin was the end of the clinical conversation. That framing missed several things. It missed the distinction between LDL concentration and LDL particle number. People with the same LDL can have radically different particle burdens and radically different actual risk. It missed LPA entirely for most of my early career. A genetically determined lipoprotein that statins do not lower and that carries independent cardiovascular risk affecting roughly 20% of the population. And it missed the upstream metabolic drivers of aoggenic dysipidemia. The combination of high triglycerides, low HDL and high small dense LDL that characterizes insulin resistance which are not captured by LDL and are not fixed by a statin. Research published in the journal of the American College of Cardiology has demonstrated that a significant proportion of cardiovascular events occur in people with LDL below the clinical treatment threshold. They were told their cholesterol was fine, their particle burden, their LPA and their insulin-driven dysipidemia were never assessed. The statin centric LDL ccentric model of cardiovascular risk is not wrong. It is incomplete in ways that have cost lives. The third thing I got wrong is the framing of exercise for weight loss. For years, I told patients, and the mainstream medical position supported this, that exercise was an important component of weight management, that increasing physical activity would help them lose weight, and that the mechanism was straightforward. Burn more calories, lose more fat. That framing is not entirely false, but it is misleading enough in practice to have caused real harm. The research on exercise and weight loss has been remarkably consistent and remarkably disappointing by the standards of the calorie and calorie out model. Exercise alone without dietary change produces very modest weight loss in most adults.

[00:12:20]Research published in the British Journal of Sports Medicine as well as analysis of large exercise intervention trials has shown that the metabolic adaptation to increased activity. The way the body downregulates non-ex exercise energy expenditure and increases appetite to compensate for the calories burned dramatically blunts the expected weight loss from exercise programs. What exercise does extraordinarily well and what I should have emphasized far more heavily is everything other than direct weight loss. It improves insulin sensitivity.

[00:12:52]It drives mitochondrial biogenesis. It preserves lean muscle mass. It reduces cardiovascular mortality independently of weight. It improves cognitive function, mood, and sleep quality. It reduces the risk of essentially every major chronic disease. Exercise is arguably the single most powerful health intervention available to a middle-aged adult. It is just not primarily a weight loss tool. And by framing it as one, I set patients up for the demoralizing experience of exercising consistently, losing minimal weight, and concluding that exercise does not work for them when in fact it was working just not on the metric I had emphasized. That framing failure had consequences. The fourth, and perhaps the one I feel most directly accountable for, is the dismissal of persistent fatigue in middle-aged patients as a normal feature of aging. stress or low mood rather than as a signal of specific identifiable and addressable biological dysfunction. I have covered the mitochondrial basis of persistent fatigue in a previous video, but I want to name it here in the context of my own clinical history because I think it matter. For years, when a patient in their 50s presented with fatigue that bloods did not explain, normal hemoglobin, normal thyroid, normal iron, the clinical pathway was counseling for stress or low mood. sometimes anti-depressants and reassurance that this was a feature of midlife that management and lifestyle adjustment could address. That pathway was inadequate, not always, but with enough frequency that it constitutes a pattern I am responsible for repeating.

[00:14:32]What the research has since established and what I now understand is that persistent treatment resistant fatigue in this demographic is frequently driven by mitochondrial dysfunction, CoQ10 depletion in statin users, insulin resistance impairing cellular energy metabolism and sleep architecture fragmentation suppressing growth hormone release and nocturnal repair. These are biological mechanisms with specific interventions. They are not mood disorders. They are not the inevitable consequence of getting older. And the patients I told to manage their stress and get more sleep who went home feeling that their problem had been treated as psychological because nothing physical could be found deserved more thorough investigation than the standard panel provides. I gave them what the system offered. The system was not offering enough. None of the patients who received that advice were failed by bad intentions. They were failed by the gap between what medicine knew and what it had not yet caught up with. But understanding the gap does not erase the obligation to acknowledge it and to correct the record for anyone who is still living with the consequences of advice that has since been superseded.

[00:15:43]So what does the corrected picture look like? I want to be specific about what the evidence now supports in place of each of the four positions I described on dietary fat and cardiovascular risk.

[00:15:55]The conversation has shifted significantly toward the quality and source of total diet rather than fat restriction as an isolated variable.

[00:16:04]Research published in the New England Journal of Medicine, including the Predimed trial, demonstrated that a Mediterranean dietary pattern characterized by whole food sources of fat, including olive oil, nuts, and oily fish alongside vegetables, legumes, and unprocessed protein reduces cardiovascular events by roughly 30% compared to a low-fat diet in high-risk adults. The emphasis should be on reducing ultrarocessed food, refined carbohydrates, and added sugar. The dietary drivers of insulin resistance, systemic inflammation, and atherogenic dysipidemia rather than on limiting naturally occurring fat from whole food sources. If I could replace the advice I gave about saturated fat with one sentence, it would be this. The food vehicle matters more than the macronutrient. Eggs from a whole food diet context do not carry the same risk as the same caloric load from a processed pastry. The distinction between whole and processed is more biologically meaningful than the distinction between fat and carbohydrates. On cholesterol and cardiovascular risk assessment, the corrected position is to move beyond LDL as the primary risk marker and towards a more complete picture that includes epo particle count LPA measured once as it is genetically stable, fasting insulin as an early marker of metabolic cardiovascular risk and high sensitivity CRP as a measure of the inflammatory burden driving endothelial dysfunction.

[00:17:35]These tests are available. They are not expensive relative to the cost of the disease they predict and they provide a categorically more accurate picture of actual cardiovascular trajectory than LDL alone. If your doctor has not discussed Apo B or LPA with you, these are worth requesting specifically particularly if you have a family history of cardiovascular disease or metabolic syndrome. on exercise and its benefits. The corrected framing is to decouple exercise from weight loss as its primary clinical value and reposition it as the most powerful systemic health intervention available across middle and later life. The prescription should be structured a combination of aerobic exercise targeting 150 minutes per week of moderate intensity or 75 minutes of high intensity and resistance training at least twice weekly with the resistance component given equal clinical emphasis to the aerobic. The goal is not primarily caloric expenditure. It is mitochondrial biogenesis, insulin sensitivity, muscle mass preservation, cardiovascular reserve and autonomic balance. These are the mechanisms by which exercise extends healthy life.

[00:18:49]They are independent of weight and they are worth pursuing with full commitment even in the complete absence of any change on the scale. on persistent fatigue. The corrected clinical approach is to extend the investigation beyond the standard panel to include fasting insulin, CoQ10 status in statin users, sleep architecture assessment, including screening for obstructive sleep apnnea and a detailed history of alcohol consumption patterns and even in cortisol drivers. The interventions that follow from this assessment targeted CoQ10 supplementation where depletion is documented, mitochondrial biogenesis through structured exercise, dietary glycemic load reduction, and sleep architecture protection are specific, evidence-based, and meaningfully different from the general lifestyle advice that constituted the previous clinical response. If you've been told your fatigue bloods are normal and your lifestyle needs to improve, you deserve a more targeted investigation than that, ask specifically about fasting insulin, about CoQ10 if you are on a statin, and about a sleep study if you snore or wake unrefreshed. I want to be clear, as always, that nothing in this video should be used to override or replace specific medical advice you have been given for a diagnosed condition. If you are on medication on a specific dietary protocol advised by a specialist or managing a complex condition, changes should be discussed with your doctor.

[00:20:21]What I am offering here is the corrected evidence base, not a personal prescription. The goal is to give you the information needed to have a more complete and productive conversation with your clinical team. Let me bring this back to the clinical setting because the consequences of the advice I described are not abstract. I have seen patients in the emergency department whose cardiovascular event came after years of following a low-fat grain-based diet that their GP endorsed. A diet that in the light of what we now understand about refined carbohydrates and insulin-driven aogenic dysipidemia may have contributed to rather than protected against their risk. I have seen patients whose statin induced CoQ10 depletion produced fatigue and exercise intolerance that their doctor attributed to aging resulting in a reduction in the very physical activity that was their most important remaining cardiovascular protection. I have seen patients whose LDL was well controlled, whose GP was satisfied, and who had an elevated LPA that nobody had measured and that drove an MI in their late50s in defiance of a lipid profile that looked acceptable.

[00:21:32]These are not unusual cases. They are the predictable consequences of a clinical framework that was built on the best available evidence of its time and has since been materially improved upon, but whose revision has not yet reached the majority of routine clinical interactions.

[00:21:49]What strikes me most after nearly a decade in emergency medicine is how much of what arrives in an acute setting was predictable. Not in the sense that it was inevitable. Most of it was not, but in the sense that the biological processes that produced the event were running measurably for years before anything dramatic happened. And the advice that was supposed to interrupt those processes was in a meaningful number of cases, either targeting the wrong mechanism, providing false reassurance through incomplete risk assessment or failing to identify a biological driver that the standard investigation was never equipped to find. Medicine is a discipline that corrects itself. That is one of its genuine strengths. The process is slower than it should be. And the communication of corrections to the people most affected by the original errors is even slower. But the direction of travel toward more precise risk assessment, more mechanistic understanding of disease, more individualized and evidence-ged clinical guidance is the right one. What I owe the patients I gave incorrect advice to is honesty, not the false comfort of calling it nuance or evolving science. Honest acknowledgement that the guidance was wrong, that better guidance exists, and that it is worth seeking out from doctors willing to engage with the updated evidence or from resources like this channel that take seriously the obligation to communicate corrections clearly and without defensiveness.

[00:23:19]30 years of advice, some of it right, some of it wrong in ways I now understand. All of it given with genuine intent to help. The intent does not change the biology. But acknowledging the error specifically, clearly, and with the corrected evidence alongside it might change the outcome for someone watching this today. If you found this video useful, please subscribe to the channel and help us reach more people who deserve this level of honesty about what the evidence actually shows.