HSA | FSA CARDS ARE NOW ACCEPTED

Last reviewed: May 12, 2026 Last updated: May 12, 2026

Written by: Jay Hastings , CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

How ADRB2 Affects Muscle Mass and Weight Loss

Muscle mass supports metabolism, bone strength, balance, and energy. The ADRB2 gene plays a role in how your body regulates receptors involved in fat breakdown and energy use. Variations in this gene can change how efficiently your body burns fat. When fat burning is less efficient, especially during calorie restriction, the body may rely more on muscle tissue for energy. Understanding your ADRB2 genotype can help you tailor nutrition, training, and lifestyle strategies to protect muscle while pursuing weight loss or maintenance.

Key Concepts

  • Fat breakdown efficiency: ADRB2 affects receptors that help mobilize stored fat. Variants can reduce this ability.
  • Muscle preservation: If fat is harder to access, the body may catabolize muscle during calorie deficits unless countermeasures are used.
  • Actionable strategies: Protein intake, controlled calorie deficits, strength training, and targeted supplements can help preserve lean mass.

Practical Recommendations for Everyone

  • Protein: Aim for 0.7 to 1.0 grams per pound of body weight per day to support muscle repair and retention.
  • Calorie deficit: Use a moderate deficit of 300 to 500 calories per day to encourage fat loss while minimizing muscle loss. Target gradual weight loss of 1 to 2 pounds per week.
  • Strength training: Focus on regular resistance training at least 3 times per week, using compound movements such as squats, deadlifts, presses, and rows.
  • Cardio: Include moderate cardio but avoid excessive endurance work during aggressive dieting, which can increase muscle breakdown.
  • Recovery and sleep: Prioritize 7 to 9 hours of sleep and include rest days to support recovery and hormone balance.
  • Body composition tracking: Use body measurements or body composition testing to monitor lean mass rather than relying solely on scale weight.

Diet and Supplement Considerations

In addition to adequate protein and a moderate calorie deficit, consider these evidence-aligned options. Discuss any supplements with your healthcare provider before starting.

  • BCAAs and Leucine: Branched chain amino acids and supplemental leucine can support muscle protein synthesis around workouts, especially when dietary protein is insufficient.
  • Vitamin D: Adequate vitamin D supports muscle function and overall health. Consider testing and supplementing if levels are low.
  • Omega-3 fatty acids: EPA and DHA may support muscle protein synthesis and reduce inflammation that can impair recovery.
  • Creatine monohydrate: Can improve strength and help preserve muscle during calorie restriction when used alongside resistance training.
  • Protein timing: Prioritize protein across meals and include a protein-rich meal or shake after resistance sessions.

Genetic Interpretation for ADRB2 (rs1042714)

Below are friendly, clear interpretations of what your specific genotype may mean for muscle preservation during calorie restriction and practical steps you can take. Use these as educational guidance only. PlexusDx does not provide medical advice. Always consult your healthcare provider before making diet, supplement, or exercise changes.

2 effect alleles (GG) — Higher risk of muscle loss

What this means

If your genotype is GG, you carry two copies of the effect allele associated with reduced fat breakdown efficiency. During calorie restriction your body is more likely to rely on muscle tissue for energy if extra precautions are not taken.

Action plan

  • Protein target: 0.8 to 1.0 grams per pound of body weight per day to prioritize muscle maintenance.
  • Calorie strategy: Keep a moderate deficit of 300 to 500 calories per day. Avoid crash dieting and aim for 1 to 2 pounds of weight loss per week.
  • Training: Strength train at least 3 times per week using compound movements and progressive overload. Include heavier sets in the 4 to 8 rep range alongside higher-rep accessory work.
  • Supplements: Consider BCAAs or leucine around workouts, vitamin D if deficient, omega-3 fatty acids, and creatine to support strength and muscle retention.
  • Monitor: Track body composition and strength. If strength declines or lean mass drops, reduce deficit and increase protein and recovery.
1 effect allele (CG) — Moderate risk of muscle loss

What this means

If your genotype is CG, you carry one copy of the effect allele and have a moderate tendency for less efficient fat breakdown. You may be somewhat more likely to lose muscle during aggressive calorie restriction compared to people without the effect allele.

Action plan

  • Protein target: 0.7 to 1.0 grams per pound of body weight per day.
  • Calorie strategy: Aim for a 300 to 500 calorie daily deficit with gradual weight loss of 1 to 2 pounds per week.
  • Training: Strength train at least 3 times per week with emphasis on compound lifts. Maintain progressive overload and include recovery days.
  • Supplements: Consider omega-3s and ensuring sufficient vitamin D. BCAAs or leucine can be helpful if dietary protein is inconsistent.
  • Monitor: Watch strength trends and body composition. Adjust calorie deficit or protein if lean mass loss is observed.
0 effect alleles (CC) — Lower risk of muscle loss

What this means

If your genotype is CC, you carry two copies of the non-effect allele. This profile is associated with better fat mobilization and a lower likelihood of using muscle as an energy source during calorie restriction. This provides a favorable starting point for preserving lean mass while losing fat.

Action plan

  • Protein target: 0.7 to 0.9 grams per pound of body weight per day to support maintenance and recovery.
  • Calorie strategy: A moderate deficit of 300 to 500 calories per day is still recommended for steady fat loss while protecting muscle.
  • Training: Maintain consistent resistance training 3 or more times per week, including compound movements to support strength and bone health.
  • Supplements: Ensure sufficient vitamin D and consider omega-3s. Creatine can further support strength and muscle quality if desired.
  • Monitor: Continue to track body composition and performance to ensure muscle mass and strength are preserved.

Additional Testing and Notes

  • Consider testing serum vitamin D if supplementation is being considered.
  • Body composition testing such as DXA or bioelectrical impedance can help track lean mass changes more accurately than scale weight alone.
  • Work with a qualified healthcare provider, registered dietitian, or certified trainer to personalize macronutrient targets and exercise programming.

Educational note: Genetic results describe tendencies and do not determine outcomes. Lifestyle, diet, exercise, and environment play major roles in your health. PlexusDx does not provide medical advice. Always consult with your healthcare provider before starting new diets, supplements, or exercise programs.

If this genetic variant is present in your PlexusDx results, the following tests and reports are commonly used to explore it further:

🧬 Genetic Tests:

🧪 Blood Tests:

📄 Genetic Report:

Frequently Asked Questions About Muscle Mass and ADRB2 rs1042714

How does the ADRB2 rs1042714 variant affect fat breakdown during weight loss?

The ADRB2 gene helps regulate receptors involved in mobilizing stored fat and using energy. Variations like rs1042714 can influence how efficiently your body burns fat—so during calorie restriction, people with the effect allele may have less efficient fat breakdown and may need additional strategies to support fat loss without compromising lean mass.

Why might I lose muscle during calorie restriction if I have the ADRB2 effect allele?

If fat is harder to access during a deficit, the body may be more likely to use muscle tissue for energy. For rs1042714, the risk increases with the number of effect alleles (GG highest risk, CG moderate risk, CC lower risk). This means protein, training, and recovery become especially important to preserve muscle while dieting.

What nutrition and training strategies help protect lean mass based on my ADRB2 genotype?

Across genotypes, the source recommends prioritizing protein (about 0.7–1.0 grams per pound per day), using a moderate calorie deficit (around 300–500 calories/day, aiming for ~1–2 pounds/week), and strength training at least 3 times per week with progressive overload. The more effect alleles you have, the more closely you may want to target protein at the higher end, monitor strength and body composition, and consider supportive options like creatine, omega-3s, vitamin D (if low), and leucine/BCAAs around workouts when needed.

What tests can help me learn more about Muscle Mass and ADRB2 rs1042714?

The Optimal Diet and Weight Loss Genetic Test delivers over 295 genetic insights related to nutrition response, body composition, metabolism, and fitness. The Weight and Body Fat Genetic Report translates your results into personalized, actionable guidance. Your healthcare provider can also recommend targeted blood tests based on your specific pathway results and health history to complement your genetic insights with current biomarker data.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.