https://lauraduffynutrition.com/

Laura Duffy Nutrition, 5525 Erindale Drive Suite 201A, Colorado Springs, CO (2026)

06/11/2026

🔥 What if insulin resistance starts with inflammation—not weight gain?

Most people are told that excess body fat causes insulin resistance, but research suggests the relationship may be more complicated. In fact, inflammation appears capable of driving insulin resistance even before substantial weight gain occurs.

Here's why:
When the immune system is chronically activated, it releases inflammatory molecules such as TNF-α and other cytokines. These inflammatory signals can:
⚠️ Interfere with insulin receptor signaling, making cells less responsive to insulin
⚡ Impair mitochondrial function, reducing the cell's ability to efficiently convert nutrients into energy
🩸 Disrupt microvascular blood flow, limiting delivery of insulin and glucose to muscle tissue

As cells become less responsive to insulin, the pancreas compensates by producing more insulin. Over time:
Inflammation → insulin resistance → higher insulin levels → greater fat storage → weight gain → more inflammation
In other words, for many people, weight gain may be one consequence of metabolic dysfunction rather than the original cause.

Research supports this concept.
Studies have found that inflammatory activity within muscle and adipose tissue is strongly associated with insulin resistance, independent of body size. Other research demonstrates that inflammation can impair insulin's actions at the level of blood vessels and tissues before obesity is fully established.

This may help explain why:
• Some lean individuals develop insulin resistance and type 2 diabetes
• Some people with obesity remain relatively insulin sensitive
• Weight loss alone does not always fully resolve metabolic dysfunction

From a functional nutrition perspective, improving metabolic health isn't just about weight loss.

It's also about reducing the sources of chronic inflammation:
🥩 Prioritize adequate protein to support blood sugar regulation and muscle health
🥬 Emphasize anti-inflammatory whole foods rich in polyphenols, fiber, magnesium, and omega-3 fats
🚶 Move regularly to improve insulin sensitivity and mitochondrial function
😴 Optimize sleep, since poor sleep increases inflammatory signaling and insulin resistance
🦠 Support gut health, as gut-derived inflammation can contribute to metabolic dysfunction

Treat the inflammation. Support the mitochondria. Improve insulin sensitivity.

The scale is only part of the story.

06/09/2026

Creatine and blood sugar, one of the most underrated connections in metabolic health.

Most people think of creatine as a muscle supplement. But emerging research suggests it may be one of the most overlooked tools for blood sugar regulation and metabolic health.

What the research shows:
- A systematic review and meta-analysis of randomized controlled trials found that creatine supplementation was effective in decreasing blood glucose and HbA1c levels compared to placebo
- The reduction in HbA1c was comparable to metformin and glibenclamide, two of the most commonly prescribed diabetes medications
- No major adverse effects were observed

How creatine supports blood sugar:
- Supports GLUT-4 transporter activity, the mechanism by which glucose is taken up into muscle cells
- When mitochondria function optimally (supported by creatine's phosphocreatine system), cells use glucose more efficiently
- Better glucose uptake = less glucose circulating in the blood = lower insulin demand = improved insulin sensitivity

Why this matters beyond blood sugar:

Metabolic health is the foundation of almost everything else:
🩸 Blood pressure: insulin resistance drives sodium retention and raises BP
🧠 Mood and cognition: blood sugar crashes impair neurotransmitter production and focus
❤️ Cholesterol: insulin resistance drives hepatic cholesterol synthesis
⚡ Energy: mitochondrial dysfunction = fatigue, brain fog, poor recovery
💪 Muscle: insulin resistance accelerates muscle loss with aging

Who may benefit from creatine for metabolic health:
- Adults managing prediabetes or type 2 diabetes
- Anyone with insulin resistance or metabolic syndrome
- People struggling with energy, brain fog, or blood sugar swings
- Older adults looking to preserve muscle and metabolic rate

Practical notes:
- Standard dose: 3–5 g/day of creatine monohydrate with food
- Discontinue 2 weeks before routine bloodwork (can falsely elevate serum creatinine)
- Always work with your clinician to personalize your approach

Read the full creatine blog:
https://www.lauraduffynutrition.com/post/creatine-monohydrate-more-than-a-gym-supplement

Sources
Gualano B et al. "Creatine supplementation in type 2 diabetic patients: a systematic review of randomized controlled trials." Nutrients. 2022. PMID: 34931982 https://pubmed.ncbi.nlm.nih.gov/34931982/
Jimenez-Gutierrez GE et al. "Role of Creatine Supplementation in Mitochondrial Dysfunction." J Clin Med. 2022. PMCID: PMC8838971 https://pmc.ncbi.nlm.nih.gov/articles/PMC8838971/
Speer T et al. "The Role of Insulin Resistance in the Pathogenesis of Hypertension." Biomedicines. 2022. https://www.mdpi.com/2227-9059/10/10/2374
Lastra G et al. "Insulin Resistance and Hypertension." Hypertension. 2018. https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.118.11728

06/04/2026

The longevity secret hiding in plain sight 🥩🥦💪

A landmark study of 3,659 older Americans followed for up to 16 years found that muscle mass, not weight, not BMI was one of the strongest independent predictors of survival. Adults with the highest muscle mass had a 19–20% lower risk of death, even after adjusting for heart disease, diabetes, inflammation, and obesity.

But muscle doesn't build itself. It requires:

🥩 Adequate protein (1.2–1.6 g/kg/day)
- Eggs, fish, poultry, grass-fed meat, Greek yogurt, cottage cheese, legumes
- Aim for 25–40 g per meal, distributed throughout the day

🥦 Anti-inflammatory whole foods
- Colorful vegetables and fruit for antioxidants and polyphenols
- Omega-3 rich foods (salmon, sardines, walnuts, chia) to reduce inflammation
- Fermented foods (yogurt, kefir, sauerkraut) for gut and immune health

⚡ Blood sugar balance
- Protein + fiber + healthy fats at every meal to steady glucose and insulin
- Stable insulin = better muscle preservation and metabolic health

💊 Key nutrients that support muscle and longevity
- Magnesium (300+ enzymatic reactions including energy production)
- Vitamin D (muscle function, immunity, bone health)
- Creatine monohydrate (supports ATP production and muscle preservation)
- Omega-3s (reduce muscle breakdown and inflammation)

🏋️ Movement matters too
- Resistance training 2–3x/week is the most powerful longevity tool available
- Daily walking supports cardiovascular fitness and metabolic health
- Even modest increases in muscle mass appear to meaningfully reduce mortality risk

👉 The bottom line: longevity isn't about eating less it's about nourishing your body with the right foods to preserve muscle, reduce inflammation, and support metabolic health as you age.

Sources:
Srikanthan P, Karlamangla AS. "Muscle Mass Index as a Predictor of Longevity in Older Adults." Am J Med. 2014. https://pmc.ncbi.nlm.nih.gov/articles/PMC4035379/
Bauer J et al. PROT-AGE Study Group.https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/

06/02/2026

Muscle mass predicts longevity better than BMI. Here's what the research shows
A landmark study using NHANES III data (3,659 older adults followed for 10–16 years) found that muscle mass index, not BMI, was a significant independent predictor of all-cause mortality.

👉 Key findings:
- Adults in the highest muscle mass quartile had a 19% lower mortality risk and 20% lower mortality rate than those in the lowest quartile after adjusting for cardiovascular risk factors, inflammation, insulin resistance, diabetes, and central obesity
- BMI showed no significant association with mortality in older adults
- Fat mass (non-muscle mass) also showed no significant association with survival
- The survival advantage appeared at the 3rd quartile and held steady suggesting there's a meaningful threshold of muscle mass worth protecting

👉 Why muscle mass matters beyond the gym:
- Muscle is a primary driver of insulin sensitivity and metabolic rate
- It serves as a protein reserve during illness and recovery
- Higher muscle mass is linked to better cardiorespiratory fitness a major predictor of longevity
- Muscle loss (sarcopenia) accelerates with age, inactivity, low protein intake, and chronic illness and increases the risk of falls and fractures

👉 What this means practically:
- Prioritize protein (1.2–1.6 g/kg/day) to preserve and build lean mass
- Resistance training 2–3x/week is one of the most powerful longevity interventions available
- Consider creatine monohydrate to support muscle preservation and metabolic health
- Ask your clinician about bioelectrical impedance (BIA) testing, like InBody. It's inexpensive, fast, and more informative than BMI for assessing metabolic health

Source: Srikanthan P, Karlamangla AS. "Muscle Mass Index as a Predictor of Longevity in Older Adults." Am J Med. 2014. PMCID: PMC4035379 https://pmc.ncbi.nlm.nih.gov/articles/PMC4035379/

05/28/2026

The Mitochondrial Connection

To understand why creatine matters beyond athletic performance, you need to understand mitochondria.

Mitochondria are your cells' power plants producing ATP through a process called oxidative phosphorylation. Mitochondria also regulate calcium, hormone synthesis, immune signaling, and cell death.

When mitochondria are dysfunctional (from aging, inflammation, infection, toxins, hypoxia, or genetic mutations), energy production falters across every system that depends on it, which can result in:
- Fatigue and brain fog
- Metabolic dysfunction
- Hormonal imbalance
- Poor immune response
- Impaired healing

Where creatine comes in:
Research in the Journal of Clinical Medicine found that creatine supplementation "has been reported to improve high-energy phosphate availability as well as have antioxidative, neuroprotective, anti-lactatic, and calcium-homeostatic effects" and "may have a role in improving cellular bioenergetics in several mitochondrial dysfunction-related diseases."

In other words: creatine doesn't just fuel muscles it supports the body's fundamental energy infrastructure.

Conditions linked to mitochondrial dysfunction that creatine may support:
- Blood sugar dysregulation and type 2 diabetes
- Brain fog and cognitive decline
- Hormonal imbalance
- Chronic fatigue and poor recovery
- Immune dysfunction and chronic inflammation

Read the full breakdown:
https://www.lauraduffynutrition.com/post/creatine-monohydrate-more-than-a-gym-supplement

05/26/2026

What Is Creatine and How Does It Work?

Creatine isn't just for bodybuilders. Your body makes it every day and every high-energy tissue in your body depends on it.

What creatine actually is:
- A naturally occurring compound made from amino acids (arginine, glycine, methionine) in the liver, kidneys, and pancreas
- Also found in red meat and fish
- Stored in muscle as phosphocreatine your body's rapid ATP recycling system

Why ATP matters:
- ATP is the energy currency of every cell
- When demand spikes (intense exercise, mental stress, immune response), ATP can be depleted quickly
- Phosphocreatine rapidly donates a phosphate group to regenerate ATP keeping cells running

Who needs this energy system?
- Skeletal muscle
- The heart
- The brain
- Immune cells

Creatine monohydrate is the most studied, most bioavailable, and most affordable supplemental form with decades of safety data across diverse populations.

Read the full blog for the bigger picture on creatine beyond the gym:
https://www.lauraduffynutrition.com/post/creatine-monohydrate-more-than-a-gym-supplement

05/21/2026

The salt paradox, why sodium restriction alone may be missing the mark on blood pressure

The new cholesterol guidelines double down on the hypertension guidelines that say: eat less salt. But what if that advice is creating a bigger problem than it solves?

Here's what the research actually shows:
- Severe sodium restriction → bland whole foods → people abandon vegetables, nuts, and protein for ultra-processed "low-sodium" alternatives loaded with sugar and refined carbs
- More sugar/refined carbs → insulin spikes → kidneys retain MORE sodium → higher blood pressure
- You treated the symptom while amplifying the root cause

The potassium-sodium ratio matters more than sodium alone:
- A landmark Archives of Internal Medicine study (12,000+ adults) found the K:Na ratio was a stronger predictor of cardiovascular events than sodium intake alone
- Potassium-rich foods (leafy greens, avocados, beans, nuts) are the same foods that taste terrible without salt, so restriction backfires

The magnesium piece most people miss:
- 48% of Americans don't get enough magnesium
- Magnesium relaxes blood vessels, supports glucose metabolism, and reduces insulin-driven sodium retention
- The foods richest in magnesium are the same ones that need salt to taste good

The functional nutrition approach:
- Add potassium + magnesium-rich whole foods, seasoned to taste
- Balance blood sugar to reduce insulin's impact on BP
- Address root causes: insulin resistance, inflammation, poor sleep, stress

Read the full breakdown with sources:
https://www.lauraduffynutrition.com/post/the-salt-paradox-why-new-hypertension-guidelines-may-be-missing-the-mark

05/19/2026

Sodium restriction and cholesterol, the nuance the guidelines miss

A cross-sectional study in Medicine found that in hypertensive women with excess weight, blood cholesterol was inversely related to sodium intake, meaning lower sodium was associated with higher cholesterol. This aligns with multiple Cochrane meta-analyses showing that sodium restriction raises total cholesterol and triglycerides.

The mechanism:
- Low sodium → reduced blood volume → activates renin, angiotensin, epinephrine
- Angiotensin I → Angiotensin II → increases insulin resistance
- Insulin resistance → increased hepatic cholesterol synthesis → higher blood cholesterol
- In people with excess weight/obesity, this effect is amplified due to existing insulin resistance and high adipose tissue lipolytic activity

What this means practically:
- Blanket sodium restriction intended to lower blood pressure may simultaneously raise cholesterol and triglycerides, a trade-off that deserves more clinical attention
- The potassium-to-sodium ratio and overall diet quality may matter more than sodium restriction alone
- People with insulin resistance or metabolic syndrome may be especially vulnerable to the cholesterol-raising effects of severe sodium restriction
- Eating nutrient-dense whole foods seasoned to taste, rather than ultra-processed low-sodium alternatives, is a more sustainable and metabolically sound approach

As one researcher noted: "Not one randomized clinical trial or observational study has supported a sodium intake below 2,645 mg, and an intake above 4,945 mg is related to higher cardiovascular morbidity", suggesting there's an optimal range, not a "lower is always better" rule.

Source: Padilha BM et al. "Association between blood cholesterol and sodium intake in hypertensive women with excess weight." Medicine. 2018. PMCID: PMC5908596 https://pmc.ncbi.nlm.nih.gov/articles/PMC5908596/

05/14/2026

Big news! 🎉

I’m officially onboarding with Berry Street.

This means:
- I can see insurance clients virtually across multiple states
- Local, in‑person visits will be available with Aetna, Cigna, and UnitedHealthcare
- More consistent care for patients who’ve been waiting to use their insurance

I’m especially excited about the in‑person option!

Read more on my website: https://www.lauraduffynutrition.com/berrystreet

Click HERE 👉 http://visit.berrystreet.co/providers/Laura-Duffy to get started and check your insurance benefits with Berry Street!

05/12/2026

Lp(a) and lifestyle — what the research actually shows

The new 2026 ACC/AHA guidelines recommend a one-time Lp(a) screening for all adults and state that Lp(a) doesn't respond to lifestyle changes. But a peer-reviewed review in the Journal of Clinical Medicine tells a more nuanced story.

What the research found may reduce Lp(a):
- Whole food diet rich in plant foods like vegetables and legumes that minimizes sugar and refined carbohydrates
- Low-carb/ketogenic diet: ~15% reduction in one large trial; 26–39% in a case report
- Higher saturated fat intake (from whole foods): mild but significant reduction in some studies
- Significant weight loss (especially bariatric surgery): up to 48% reduction
- Red wine (moderate): reduced Lp(a) in small trials (overall alcohol risks must be weighed)
- Intense physical exercise: associated with lower Lp(a) in some populations
- CoQ10 supplementation: ~3.5 mg/dL reduction (meta-analysis of 7 RCTs)
- L-Carnitine supplementation: ~8–9 mg/dL reduction (meta-analysis of 7 RCTs)
- Flaxseed supplementation: mild but significant reduction (meta-analysis of 6 RCTs)
- Curcumin: mild reduction in diabetic patients with CAD

What raises Lp(a):
- Trans-fatty acids (industrial/hydrogenated fats)
- Ultra-processed foods
- Low-energy diets without significant weight loss

Important caveats: Most trials are small and short-term. Evidence is not yet strong enough for firm clinical recommendations. But it directly challenges the blanket statement that Lp(a) is completely unresponsive to lifestyle.

Bottom line: If you have elevated Lp(a), lifestyle and targeted supplementation may help move the needle, even modestly. Work with your clinician to personalize your approach.

Source: Fogacci F et al. "Lifestyle and Lipoprotein(a) Levels: Does a Specific Counseling Make Sense?" J Clin Med. 2024. PMCID: PMC10856708 https://pmc.ncbi.nlm.nih.gov/articles/PMC10856708/

Laura Duffy Nutrition

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