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The LiveNow Longevity Library

Evidence-based articles on peptide therapy, longevity medicine, NAD+, weight management, and regenerative care — written and reviewed by a board-certified physician.

65 articlesUpdated weeklyReviewed by Dr. Charles Kamen, MD
FeaturedRegenerative Medicine

Peptides for Tissue Repair: Mechanisms and Evidence

Receptor pathways, dosing approaches, and the published trials supporting tissue-repair peptides.

Apr 11, 20269 min readRead article
All articles, newest first
Longevity Medicine

What Does an Anti-Aging Doctor Do? A Physician's Guide

What an anti-aging physician actually does — evidence-based healthspan medicine, what an evaluation involves, how it differs from a med spa, and how to choose a real one.

Jun 20, 20268 min readRead
Longevity Medicine

How to Choose an Anti-Aging Clinic: A Physician's Checklist

Physician-led vs technician-led, lab-based vs one-size-fits-all, honest claims vs miracle promises — a physician's checklist for vetting any anti-aging clinic.

Jun 20, 20268 min readRead
Longevity Medicine

Anti-Aging Treatments That Are Actually Evidence-Based

A category-by-category look at anti-aging treatments — foundations, biomarkers, NAD+, peptides, weight management — with honest "what the evidence supports" framing.

Jun 20, 20269 min readRead
Peptide Therapy

Peptide Therapy in Las Vegas: 2026 Cost, Legality & Clinic Guide

A sourced reference on peptide therapy in Las Vegas — Nevada legality, 2026 FDA status by peptide, and real market cost ranges, so you can evaluate any clinic on the evidence.

Jun 11, 202611 min readRead
Peptide Therapy

Retatrutide Las Vegas: What Patients Should Know Before They Start

What retatrutide is, who it may be appropriate for, and how a Las Vegas physician evaluates patients before any triple-hormone peptide protocol.

Jun 2, 20269 min readRead
Peptide Therapy

Henderson Peptide Therapy Guide: How a Physician-Led Clinic Works

A complete guide to physician-led peptide therapy for Henderson, Green Valley, Anthem, and Seven Hills patients — from evaluation to protocol.

Jun 2, 20269 min readRead
Weight Management

Weight Loss Plateau After GLP-1: How a Las Vegas & Henderson Physician Can Help

Why GLP-1 plateaus happen, what labs and protocols to consider, and when to seek a physician-led evaluation in Las Vegas or Henderson.

Jun 2, 20268 min readRead
Peptide Therapy

Peptide Therapy Cost in Las Vegas: A Physician's Pricing Guide

What determines the cost of peptide therapy in Las Vegas — evaluation, sourcing, protocol design, and what a physician-led clinic charges in 2026.

Jun 2, 20268 min readRead
Weight Management

Tirzepatide vs Semaglutide: A Las Vegas Physician's Comparison

How tirzepatide and semaglutide differ, who each is right for, and how a Las Vegas physician evaluates patients before recommending either weight loss medication.

Jun 2, 20269 min readRead
Longevity Medicine

NAD+ IV Therapy Las Vegas: A Physician's Complete Guide

How NAD+ IV therapy works, what the research supports, and how a Las Vegas physician evaluates patients before adding NAD+ to a longevity protocol.

Jun 2, 20268 min readRead
Weight Management

GLP-1 Medications 2026: A Las Vegas & Henderson Physician's Guide

The full landscape of GLP-1 medications available in 2026 — semaglutide, tirzepatide, retatrutide — and how a Las Vegas physician chooses between them.

Jun 2, 20269 min readRead
Peptide Therapy

How to Find a Legitimate Peptide Doctor in Las Vegas

Red flags and green flags for evaluating any peptide clinic in Las Vegas — questions to ask, what a real evaluation looks like, and why physician-led care matters.

Jun 2, 20267 min readRead
Peptide Therapy

Peptides for Healthy Aging: A Physician's Overview

How peptides fit into a longevity plan — the aging pathways they touch, the evidence, and realistic expectations for healthspan.

May 24, 20269 min readRead
Peptide Therapy

Peptides for Recovery: What the Evidence Shows

The peptides studied for tissue repair and recovery, what the research supports, and why supervision and fundamentals still matter.

May 22, 20269 min readRead
Peptide Therapy

Physician-Led vs Telehealth Peptide Clinics: How to Choose

What "physician-led" and "telehealth" actually mean — and the questions that separate real peptide care from a quick online prescription.

May 20, 20268 min readRead
Peptide Therapy

Reproductive Peptide Therapy: A Physician’s Overview

An evidence-based look at peptides studied in reproductive and hormone health, and how they are evaluated within a supervised plan.

Apr 11, 20266 min readRead
Regenerative Medicine

Growth Factor Therapy in Regenerative Medicine

How growth factors signal repair, current clinical applications, and what the data supports today.

Apr 10, 20268 min readRead
Weight Management

Triple-Hormone Agonist Peptides for Weight Loss

The next generation of weight-loss medications targets three hormone pathways at once. What that means, and how candidacy is assessed.

Apr 10, 20267 min readRead
Regenerative Medicine

Peptide Therapy for Joint Health and Repair

BPC-157, TB-500, and the peptides with the strongest evidence for connective tissue support.

Apr 9, 20269 min readRead
Peptide Therapy

Understanding Your Body’s Peptide Response

Why two people respond differently to the same peptide protocol, and how individual evaluation shapes dosing and expectations.

Apr 9, 20266 min readRead
Regenerative Medicine

PRP Therapy for Joint Health

Mechanism of action, ideal candidates, and where platelet-rich plasma fits into a regenerative protocol.

Apr 8, 20268 min readRead
IV Nutrition

IV Therapy for Athletic Recovery: What the Evidence Shows

Hydration, glutathione, NAD+, amino acids — what actually moves the needle on recovery markers.

Apr 7, 20268 min readRead
IV Nutrition

Custom IV Protocols: How Dr. Kamen Designs Your Infusion

A walk-through of how labs, symptoms, and goals translate into a personalized IV formulation.

Apr 6, 20267 min readRead
Peptide Therapy

GHRH vs. GHRP: Growth Hormone Peptides Compared

Two families of growth hormone peptides work in different ways. A physician’s comparison of GHRH and GHRP, and why they are often considered together.

Apr 6, 20267 min readRead
IV Nutrition

Zinc and Immune Function: The Case for IV Zinc

When oral zinc falls short, what serum and intracellular markers reveal, and IV protocol considerations.

Apr 5, 20266 min readRead
Peptide Therapy

Lipolytic Peptides for Fat Loss, Explained

The science behind lipolytic peptides studied for fat metabolism, what the evidence actually supports, and why supervision matters.

Apr 5, 20266 min readRead
IV Nutrition

Magnesium IV Therapy: Cellular Mineral for Energy and Calm

Magnesium’s role in 300+ enzymatic reactions, who is depleted, and the IV use case.

Apr 4, 20266 min readRead
Peptide Therapy

GHRH Peptides for Growth Hormone Optimization

How growth hormone-releasing hormone (GHRH) peptides support the body’s own growth hormone production, and where they fit in a physician-supervised protocol.

Apr 4, 20267 min readRead
IV Nutrition

IV Therapy vs Oral Supplements: What the Science Says

Bioavailability, indication, and where IV genuinely outperforms — separating evidence from marketing.

Apr 3, 20268 min readRead
Peptide Therapy

Melanocortin Peptides (Bremelanotide) for Wellness

How melanocortin peptides are used in sexual wellness, what the research shows, and how candidacy is determined after medical evaluation.

Apr 3, 20266 min readRead
IV Nutrition

B-Complex IV Therapy for Energy and Metabolism

Why B-vitamin status matters for mitochondrial output, and when IV delivery makes sense over oral.

Apr 2, 20266 min readRead
Regenerative Medicine

Gut Health and Peptide Therapy: BPC-157 and GI Protection

How a stable gastric pentadecapeptide may support GI lining, with current evidence and limitations.

Apr 2, 20268 min readRead
Peptide Therapy

GHRP: Growth Hormone Secretagogues Explained

What growth hormone secretagogue peptides (GHRP) are, how they signal the pituitary, and how protocols are evaluated and monitored.

Apr 2, 20267 min readRead
Longevity Medicine

Telomere Length and Biological Age

How telomere shortening drives cellular aging — and what current evidence says about slowing it.

Apr 1, 20267 min readRead
Regenerative Medicine

Peptides and Nerve Regeneration: What the Science Shows

Pre-clinical and emerging human evidence on peptides supporting peripheral nerve recovery.

Apr 1, 20269 min readRead
NAD+ Therapy

NAD+ and Aging: Science and Clinical Evidence

Cellular energy, sirtuin signaling, and the trial data on NAD+ precursors and IV NAD+.

Mar 28, 20269 min readRead
Peptide Therapy

Tissue Repair Peptides: What the Research Shows

A physician’s review of the preclinical and human evidence for tissue repair peptides, and how to think about them honestly.

Mar 28, 20268 min readRead
Longevity Medicine

Autophagy: Your Body’s Cellular Cleanup System

How autophagy clears damaged proteins, and the lifestyle and pharmacologic levers that support it.

Mar 25, 20268 min readRead
Weight Management

Metabolic Adaptation During Weight Loss: Why Results Slow Down

Adaptive thermogenesis, hormonal changes, and clinical strategies to break through plateaus.

Mar 20, 20268 min readRead
Weight Management

Dual-Action vs. Single-Hormone Weight-Loss Medications

Single- and dual-hormone weight-loss medications work through different mechanisms. A physician’s comparison of the options.

Mar 20, 20267 min readRead
Longevity Medicine

Mitochondrial Dysfunction and Aging

Mitochondrial decline as a hallmark of aging, with current strategies for supporting bioenergetics.

Mar 18, 20269 min readRead
Telehealth

Telemedicine Peptide Therapy in Nevada: What the Law Allows

How Nevada regulations shape telehealth peptide care, and what to expect from a compliant visit.

Mar 15, 20266 min readRead
Weight Management

Weight-Loss Medications vs. Peptides for Weight Loss

How prescription weight-loss medications and peptide protocols differ, and how a physician decides which tool fits which patient.

Mar 15, 20267 min readRead
Longevity Medicine

Insulin Sensitivity and Longevity Medicine

Insulin signaling as a pace-of-aging lever — markers, targets, and lifestyle plus pharmacologic options.

Mar 12, 20268 min readRead
Weight Management

Sleep and Weight Loss: The Metabolic Connection

How sleep architecture affects appetite hormones, energy balance, and weight-loss success.

Mar 10, 20267 min readRead
Weight Management

Managing Weight-Loss Medication Side Effects

Nausea, appetite changes, and dosing strategy — a physician’s guide to managing common side effects of weight-loss medications safely.

Mar 10, 20267 min readRead
Longevity Medicine

Epigenetic Age Testing: Measuring Biological Age

DNA methylation clocks, what the labs really tell you, and where the science still has gaps.

Mar 8, 20268 min readRead
Weight Management

Leptin Resistance and Weight Loss: What It Means

How leptin signaling breaks down, why hunger persists despite higher body fat, and the clinical work-up.

Mar 5, 20267 min readRead
Longevity Medicine

Exercise and Longevity: What the Research Shows

Strength, zone 2, VO2 max — the dose-response data on exercise as the most powerful longevity input.

Mar 2, 20269 min readRead
Diagnostics

Longevity Lab Guide: Key Biomarkers Explained

A practical reference for the biomarkers that actually inform a longevity protocol — and how to read them.

Feb 28, 202611 min readRead
Weight Management

Maintaining Weight After GLP-1 Therapy

Off-ramp strategies, body composition preservation, and the data on relapse prevention.

Feb 25, 20267 min readRead
Peptide Therapy

Subcutaneous Peptide Injection Guide

Technique, site rotation, sterility, and the practical details Dr. Kamen reviews with every patient.

Feb 22, 20266 min readRead
Weight Management

Cortisol and Weight Loss Resistance: The Stress Connection

How chronic cortisol elevation drives belly fat, insulin resistance, and weight-loss plateaus.

Feb 20, 20267 min readRead
Peptide Therapy

Stacking Peptides: Combining Protocols Safely

When peptide stacks make clinical sense, common combinations, and how to monitor for interactions.

Feb 16, 20268 min readRead
Weight Management

Thyroid Function and Metabolic Health

Why TSH alone can miss thyroid issues, and the full panel that better reflects metabolic status.

Feb 15, 20267 min readRead
IV Nutrition

Glutathione IV Therapy: The Master Antioxidant Explained

Glutathione’s role in detoxification, depletion in disease, and what IV delivery accomplishes.

Feb 10, 20267 min readRead
Education

Peptide Therapy Legality in Nevada: A Physician’s View

How federal compounding rules and state law intersect for peptide prescribing in Nevada.

Feb 10, 20268 min readRead
Longevity Medicine

Key Biomarkers Every Adult Should Track

A short list of the most informative annual labs to monitor longevity-relevant health.

Feb 8, 20268 min readRead
IV Nutrition

Vitamin D Deficiency in Adults: The Longevity Connection

Optimal serum 25(OH)D ranges, sun vs. supplementation, and IV vitamin D in clinical practice.

Feb 5, 20267 min readRead
Longevity Medicine

hs-CRP and Chronic Inflammation: The Silent Driver of Aging

What high-sensitivity CRP reveals, target ranges for longevity, and lifestyle plus targeted interventions.

Feb 1, 20268 min readRead
Longevity Medicine

HbA1c and Metabolic Health: What Your Blood Sugar Marker Means

HbA1c target ranges for longevity (not just diabetes), and what to do when yours is creeping up.

Jan 28, 20267 min readRead
Weight Management

Nutrition While on GLP-1 Therapy

Protein targets, micronutrient strategy, and the eating patterns that complement GLP-1 medications.

Jan 25, 20267 min readRead
Longevity Medicine

Hormone Panels for Longevity: What to Test

The full hormone work-up for longevity-focused care — sex hormones, adrenal, thyroid, and growth axis.

Jan 22, 20269 min readRead
Weight Management

Muscle Preservation During Weight Loss: Science and Strategy

Why losing weight without losing muscle is non-negotiable for longevity — protein, training, and labs.

Jan 12, 20268 min readRead