Health Journal Online

Tag: response

  • How Metabolic Flexibility and Fuel Switching Shape a Healthier Metabolism and Stronger Insulin Response

    How Metabolic Flexibility and Fuel Switching Shape a Healthier Metabolism and Stronger Insulin Response

    Metabolic flexibility is emerging as a key marker of how well a person’s metabolism adapts to changing demands and fuel availability. It describes how efficiently the body can perform fuel switching between carbohydrates (glucose) and fats in different states such as feeding, fasting, and exercise.

    When fuel switching works well, insulin, mitochondria, and cellular energy systems stay in better balance, supporting long‑term metabolic health.

    What Is Metabolic Flexibility?

    Metabolic flexibility is the capacity of the body to switch between burning glucose and fat depending on what fuels are available and what the body needs at that moment.

    In a flexible state, the body increases carbohydrate oxidation after a meal and then shifts to fat oxidation during fasting or when carbohydrate intake is lower. This adaptability helps maintain stable energy and efficient nutrient handling.

    Fuel switching operates across a 24‑hour cycle. After eating, glucose becomes the primary fuel, especially for the brain and working muscles. Between meals and overnight, when insulin levels drop, the body draws more heavily on stored fat.

    A flexible metabolism transitions smoothly between these states, while a less flexible one tends to rely excessively on glucose and store more energy as fat.

    How Insulin and Mitochondria Shape Fuel Switching

    Insulin and mitochondria are central to metabolic flexibility. After a carbohydrate‑rich meal, insulin rises and signals cells to take up glucose, using it immediately for energy or storing it as glycogen. At the same time, insulin temporarily suppresses the release of fatty acids from fat tissue, shifting the system toward glucose use.

    As time passes after a meal and insulin levels fall, fat cells begin releasing fatty acids, and tissues increase fat oxidation. In a flexible system, this transition happens smoothly. Chronic high insulin levels and insulin resistance disrupt this rhythm, keeping the body stuck in glucose‑dominant mode and making it harder to tap into fat stores for fuel.

    Mitochondria, the cell’s energy‑producing structures, are where both glucose and fatty acids are oxidized to generate ATP.

    Healthy mitochondria can handle different fuel mixes, ramping up fatty acid oxidation during fasting and managing carbohydrate surges after meals without excessive metabolic stress. When mitochondrial function or number declines, fuel switching becomes less efficient, and excess fuel is more likely to be stored in tissues such as liver and muscle, which can promote insulin resistance.

    Why Metabolic Flexibility Matters for Health

    Metabolic flexibility sits at the intersection of insulin sensitivity, mitochondrial function, and long‑term cardiometabolic health.

    When fuel switching is intact, the body handles post‑meal blood sugar more effectively, reducing sharp spikes and insulin surges. Over time, this can ease the burden on the pancreas and help maintain healthier glucose control.

    Research associates metabolic inflexibility with conditions like insulin resistance, type 2 diabetes, obesity, and cardiovascular disease, according to Cleveland Clinic.

    Inflexible systems often show persistent reliance on glucose, difficulty increasing fat oxidation, and signs of mitochondrial overload or dysfunction. These patterns contribute to chronic low‑grade inflammation and the accumulation of fat in the liver and muscles, all of which raise long‑term disease risk.

    Signs of Poor Metabolic Flexibility

    Metabolic flexibility is often measured in research settings, but everyday signs can provide clues.

    Frequent energy crashes between meals, strong dependence on snacks, and intense cravings for refined carbohydrates may indicate trouble transitioning from glucose to fat as a fuel source. Feeling shaky, irritable, or unusually fatigued when meals are delayed can suggest similar issues.

    Physical and laboratory markers also offer hints. Central weight gain, elevated fasting glucose or insulin, high triglycerides, and low HDL cholesterol often cluster with impaired metabolic flexibility. While none of these signs are diagnostic on their own, together they can point to a metabolism that struggles with effective fuel switching.

    What Undermines Metabolic Flexibility?

    Modern lifestyles can make metabolic flexibility harder to maintain. Highly processed diets rich in refined carbohydrates and fats, frequent snacking, and low physical activity keep a constant influx of energy coming in.

    Under these conditions, insulin may remain elevated for long periods, leaving fewer opportunities for the body to shift back into fat‑burning mode between meals.

    Chronic overnutrition and sedentary behavior can overload mitochondria and promote fat storage in tissues not designed to store large amounts of lipid.

    Aging, poor sleep, and ongoing psychological stress can further reduce insulin sensitivity and alter hormonal balance. Over time, these influences accumulate and make fuel switching less responsive, reinforcing a state of metabolic inflexibility.

    How to Improve Metabolic Flexibility Safely

    Improving metabolic flexibility involves gradual, sustainable changes rather than extreme interventions, as per Mayo Clinic.

    A dietary pattern centered on minimally processed foods, adequate protein, healthy fats, and moderate amounts of carbohydrates supports more stable insulin responses. Setting defined meal times and limiting constant snacking allows the body to cycle naturally between periods of glucose use and fat use.

    Physical activity is one of the most effective tools for enhancing metabolic flexibility. Regular aerobic exercise, resistance training, and some higher‑intensity efforts increase mitochondrial density and capacity in muscles.

    As these adaptations build, muscles become better at using both fat and glucose, even at rest. Alongside movement, quality sleep, stress management, and limiting alcohol and tobacco use help maintain insulin sensitivity and healthier fuel switching.

    People with existing metabolic conditions or taking medications should consult a healthcare professional before major shifts in diet or fasting patterns. The aim is to train the metabolism toward greater metabolic flexibility through consistent routines that are realistic to maintain over the long term.

    Metabolic Flexibility: Training Metabolism for Better Fuel Switching

    Metabolic flexibility captures how well the body’s metabolism can shift between glucose and fat, under the guidance of insulin and powered by mitochondria.

    When this fuel switching works smoothly, the system handles meals, fasting periods, and physical activity with less strain, supporting steadier energy, healthier body composition, and lower long‑term disease risk.

    By focusing on nutrient‑dense foods, regular movement, structured meal timing, and restorative lifestyle habits, individuals can gradually nudge their metabolism toward better metabolic flexibility and more resilient fuel switching over time.

    Frequently Asked Questions

    1. Can someone be metabolically flexible and still have extra body fat?

    Yes. A person can carry extra body fat yet still show good metabolic flexibility, especially if they have good insulin sensitivity, move regularly, and maintain stable blood sugar.

    2. Does drinking coffee affect metabolic flexibility?

    Caffeine can temporarily increase fat oxidation and alertness, but its impact on long‑term metabolic flexibility depends more on overall diet, sleep, and activity than coffee itself.

    3. Is metabolic flexibility permanent once it improves?

    No. Metabolic flexibility is dynamic and can improve or decline over time, depending on ongoing habits like nutrition, physical activity, sleep, and stress management.

    4. Can someone have normal lab tests but still be metabolically inflexible?

    Yes. Standard lab tests may look normal while early signs of metabolic inflexibility, like energy crashes, cravings, or difficulty fasting, are already present, especially in the early stages.



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  • The “About To” Moment: Teaching and Modeling Response vs. Reaction

    The “About To” Moment: Teaching and Modeling Response vs. Reaction

    Children learn largely by example. Susan Kaiser Greenland explains how the “about to” moment can foster awareness and compassion.

    Have you ever noticed a funny feeling in your body the split-second before doing something you later regret? Maybe the funny feeling is a tightening in your chest, or a flush of heat rushing to your face, or a sinking feeling in the pit of your stomach. These funny feelings can take place in what Western meditation teacher Joseph Goldstein calls the “about to” moment. This moment is the split-second before you speak or act.

    We can train ourselves to identify when the “about to” moment is occurring in our lives, and notice the internal signals that accompany it. By paying attention to the physical sensations that sometimes accompany an “about to” moment, we have an opportunity to pause before acting and reflect on what we’re about to do or say. This is a chance to ask ourselves critical questions, like:

    • “Why choose to act in this way?”
    • “How does it make me feel?”
    • “Will what I’m about to do or say lead me and my family closer to, or further away from, genuine happiness?”

    Parenting in the “About To” Moment

    The “about to” moment has special relevance to parenting because it is also the place and time where we choose (whether consciously or not) what we teach our children by example. It is a chance to shift direction if we recognize that our automatic reaction to a stressful situation is not consistent with our image of the parent we hope to be, or the adults we hope our children will become. Character development is a life-long process, happening through repeated actions both large and small. One place it happens is during the countless “about to” moments in our lives.

    In 2018, several prestigious universities published a study about the effect of spanking on three-year-old children. They reported that three-year-olds who had been spanked by their mothers more than twice in the month prior to the time they were assessed by researchers had an increased risk for higher levels of child aggression at age five than children who had not been spanked.

    Even though this finding is consistent with a well-established body of academic literature on the topic, and the American Academy of Pediatrics recommends that parents refrain from spanking entirely, the reporting of this study has been somewhat controversial. In the comment section of several blogs about the research, some people have taken offense. Perhaps because many parents continue to spank their kids, even those as young as three. According to the American Academy of Pediatrics, more than 90 per cent of families report having used spanking as a form of discipline.

    The “about to” moment, when a parent chooses to spank a child, is an opportunity for the parent to ask what he or she is trying to accomplish. Spanking is, at the very least, a stressful life experience for both parent and child, and it is well known that stressful life events can have a profound impact on brain development, especially in young children.

    In their book Born for Love: Why Empathy is Essential, Dr. Bruce Perry and Maia Szalavitz explain that when early childhood experiences are nurturing and empathetic, a child’s nervous system will wire up one way. If early childhood experiences are stressful, harsh and frightening, the same child’s brain wires up in a different way. “About to” moments can make learning and later relationships easier or more challenging. I doubt that any parent, upon reflection, hopes that his or her actions will make it more difficult for kids to learn and get along with others at school or home.

    Self-Reflection, Compassion, and Modeling

    The “about to” moment is also an opportunity to reflect on the quality that one is reinforcing within oneself and modeling for one’s kids. For example, is striking out in response to behavior that we disagree with/disapprove of a quality that we want to strengthen in ourselves? Is it one we want to model for our child? Will teaching children that it’s OK to hit other people help them become their best selves? Help them have an easier time on the playground? Lead them toward genuine happiness?

    The choices that we make in our “about to” moments determine who we are and who we will become. They also let our kids know loud and clear what’s important to us. Making the choice to exercise restraint, empathy, compassion and even-handedness time and time again is how these qualities become habitual in both parent and child. For example, when our kids see us being kind to others, we’re both practicing kindness ourselves and modeling it for them. When they watch us exercise patience while waiting our turn in the grocery line or when stuck in traffic, we’re both modeling patience to our kids and practicing it ourselves. When we find nonviolent ways to address inappropriate behavior we’re both modeling nonviolence and practicing it ourselves.

    To borrow from Ralph Waldo Emerson, “Character is higher than intellect.” It is the choices we make in the “about to” moments—choices we make over and over again all day every day—that determine our character and set an example for our children to follow.

    For more, watch Susan Kaiser Greenland’s video, Teach your kids awareness with an apple!



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  • Robin Avalos on Shaping a Public Health Response to Substance Risks

    Robin Avalos on Shaping a Public Health Response to Substance Risks

    The United States faces a pervasive crisis too often overlooked. Addiction, unintentional exposure, and gaps in education and access quietly undermine families and communities. Beneath everyday life lies a problem demanding clearer attention. In response, Robin Avalos, MMS, PA-C, brings clinical expertise and advocacy to advance practical, evidence-informed solutions.

    Avalos brings training and on-the-ground experience to conversations many find difficult. She began her career as an EMT, studied neuroscience and biology, and completed graduate work focused on correctional healthcare. Working in jails, emergency departments, and group homes exposed her to how fragmented responses and missed screenings can leave people unprotected. Personal tragedy, family members lost to overdose, sharpened her commitment to change and to compassionate, evidence-informed care.

    Her insights stem from years of clinical practice and a refusal to simplify a complex problem. Avalos has reconnected people to treatment through telehealth, coordinated medication access, and trauma-informed follow-up. She has stood in school offices and staff rooms asking practical questions about prevention and screening and pushed for policies that treat safety as routine rather than punitive. “We can approach this like public health: small steps that keep people alive and ready to get help,” she says, urging a steady, human-centered response.

    The broader landscape helps explain why that steadiness matters. National data show overdose counts have been tragically high and that illicit synthetic opioids such as fentanyl are central drivers of the crisis. Laboratory testing and law enforcement data also document how lethal contamination of counterfeit pills and other supplies has worsened risk.

    Within that reality, Avalos highlights an important mismatch. The tools to obtain dangerous substances are often easy to reach, while practical testing and reliable, nonjudgmental information aren’t always in place. Fentanyl test strips, low-cost, rapid screening tools that detect fentanyl in a variety of drug forms, are endorsed as a harm-reduction option by health agencies and can be paired with naloxone distribution and counseling to lower risk.

    Avalos frames these steps as practical prevention rather than punishment. “A simple test can change a decision in a moment, and that moment can be life-saving,” she says. For instance, a study shows that people who use fentanyl test strips are more likely to engage in risk-reduction behaviors. “When testing is paired with clear information and access to rescue medication, those benefits can increase,” Avalos adds.

    Yet distribution and adoption remain uneven due to different policies and varying views about harm reduction across communities. Avalos sees two linked priorities. First, improve screening and immediate safeguards in places where young people and families spend time, such as schools, community centers, and primary care clinics, without turning every conversation into a punitive exam.

    Second, invest in education so parents, teachers, and clinicians can recognize subtle signs of exposure and respond with curiosity and care rather than blame. Avalos urges school leaders and health officials to make sensible, age-appropriate changes so safety becomes part of routine care rather than an emergency-only reaction. It’s worth noting that some jurisdictions have begun to pilot such approaches and policy changes in schools.

    Her approach is intentionally practical. Streamline access to lifesaving interventions, ensure continuity of care after acute events, and remove barriers that make follow-up treatment difficult. Screening should complement, not replace, clinical judgment and therapeutic support. After all, it’s an entry point to care rather than an end. “We’re not trying to shame anyone,” Avalos says. “We want a simple way for people to look after one another and then walk together toward recovery.”

    Addressing this crisis will not be quick, but Avalos’s advocacy models a steady pathway. It asks for more listening, better training for adults who care for young people, and small structural adjustments that reduce harm and create clear pathways back to treatment. For policymakers, clinicians, educators, and parents, her work points to pragmatic actions. Normalize harm reduction where appropriate, expand screening and naloxone access, and commit to honest, nonpunitive education that keeps communities safer. She remarks, “Start with safety, keep doors open to care, and treat one another with the decency we all deserve.”

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  • Daily Turmeric – Dietary Supplement | Supports Healthly Inflammatory Response

    Daily Turmeric – Dietary Supplement | Supports Healthly Inflammatory Response

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