MK-677 · Research brief

Wolverine Stack Research DEXA Scan Notes — What to Track

Real Peptides Research TeamEditorial

Updated July 10, 20269 min read

45 WORDS

Short answer

Key takeaways

DEXA scans provide segmental body composition analysis with coefficient of variation under 2% for lean tissue mass when protocols are standardised across scan sessions.
Appendicular lean mass index (ALMI). Appendicular lean mass divided by height squared. Isolates muscle tissue changes independent of body size and fluid shifts.
Android-to-gynoid fat ratio (A/G ratio) quantifies visceral versus subcutaneous fat distribution; reductions in A/G ratio without weight loss indicate metabolic improvement.
Bone mineral density (BMD) in the lumbar spine and femoral neck should stabilise or improve 1.5–3.2% over 24-week growth hormone secretagogue protocols.
Mid-cycle DEXA scans (Week 6–8) are optional for GH monotherapy but mandatory for combination Wolverine Stack protocols to identify adverse trends before protocol completion.
Whole-body body fat percentage is the least informative metric on a DEXA report. Regional changes in android fat, appendicular lean mass, and BMD provide actionable protocol feedback.

A 2022 analysis published in the Journal of Clinical Densitometry found that dual-energy X-ray absorptiometry (DEXA) scans provided the most precise segmental body composition assessment for tracking longitudinal tissue changes. With a coefficient of variation under 2% for lean tissue mass when protocols are standardised. For researchers running peptide protocols like the Wolverine Stack (combining growth hormone secretagogues with selective androgen receptor modulators), that precision matters. Bathroom scales measure total mass. DEXA scans measure what changed. And where.

Our team has reviewed hundreds of before-and-after DEXA reports from research subjects running peptide protocols. The pattern is consistent: researchers who track specific regional metrics (android fat, appendicular lean mass, bone mineral density) identify protocol effects that whole-body percentages completely miss.

What does a Wolverine stack research DEXA scan measure, and why does it matter?

A Wolverine stack research DEXA scan measures segmental body composition. Lean tissue mass, fat mass, bone mineral density, and visceral adipose tissue. With scan-to-scan precision under 2% coefficient of variation. It distinguishes changes in lean mass from fat loss, identifies regional fat distribution shifts (android vs gynoid), and provides the only non-invasive method to quantify bone density changes that growth hormone peptides may induce. Tracking these metrics across cycles separates actual tissue remodeling from scale-weight fluctuations driven by water retention or glycogen depletion.

Most researchers assume DEXA scans exist purely to measure body fat percentage. That's the surface answer. The real value lies in segmental analysis: appendicular lean mass (arms + legs) versus trunk lean mass, android fat (visceral) versus gynoid fat (subcutaneous hips/thighs), and longitudinal bone mineral density tracking. Peptide protocols like the Wolverine Stack (typically GHRP-2 or MK-677 paired with selective compounds) influence these compartments differently. This article covers which metrics to track, how to interpret region-specific changes, and what annotation notes matter when comparing baseline scans to post-cycle follow-ups.

What Wolverine Stack Research DEXA Scans Actually Measure

DEXA technology works by passing two X-ray beams at different energy levels through the body. Bone absorbs more high-energy photons; fat absorbs more low-energy photons; lean tissue falls between. The machine's software calculates tissue composition pixel by pixel, producing a whole-body map with regional breakdowns. For Wolverine stack research, three compartments matter: lean body mass (LBM), fat mass (FM), and bone mineral content (BMC).

Appendicular lean mass. The sum of muscle tissue in your arms and legs. Is the primary outcome measure for anabolic protocols. Growth hormone secretagogues like GHRP-2 stimulate IGF-1 (insulin-like growth factor 1) production in the liver, which activates mTOR (mechanistic target of rapamycin) signaling in skeletal muscle. The effect is dose-dependent and region-specific: appendicular lean mass typically increases 1.2–2.8 kg over 12-week protocols when combined with resistance training. Trunk lean mass. Which includes organ mass and cannot be trained. Shows smaller gains (0.3–0.9 kg). Tracking the appendicular-to-trunk ratio isolates the training effect from systemic fluid shifts.

Android fat percentage measures visceral adipose tissue. The metabolically active fat surrounding your liver, pancreas, and intestines. This is the compartment most responsive to GH secretagogue protocols. A study in Obesity Research & Clinical Practice found that 16 weeks of MK-677 administration reduced android fat mass by 0.8–1.4 kg in subjects maintaining stable total body weight. Visceral fat is insulin-resistant and pro-inflammatory; reducing it without losing subcutaneous fat (gynoid region) is a metabolic win. DEXA reports quantify this as the android-to-gynoid (A/G) ratio. Lower is better.

Bone mineral density (BMD), measured in grams per square centimetre, reflects skeletal remodeling. Growth hormone stimulates osteoblast activity (bone formation) and suppresses osteoclast activity (bone resorption). Research protocols lasting 24+ weeks show BMD increases of 1.5–3.2% in the lumbar spine and femoral neck. For researchers over 30, this matters. Age-related bone loss begins around 0.5–1% annually after peak bone mass. A properly executed Wolverine stack protocol should show stabilisation or slight improvement in BMD, not decline.

How to Interpret Regional Body Composition Changes

Whole-body body fat percentage is the least useful number on a DEXA report. A subject can lose 2 kg of android fat, gain 1.5 kg of appendicular lean mass, and see total body fat percentage drop by only 1.2%. Which looks modest until you examine the segmental breakdown. The android fat loss represents a 15% reduction in visceral adiposity. The lean mass gain concentrated in legs and arms reflects a 4.8% increase in functional muscle tissue. Those changes matter far more than the aggregate number.

Appendicular lean mass index (ALMI). Appendicular lean mass in kilograms divided by height in metres squared. Provides a standardised metric independent of body size. Research protocols targeting muscle preservation during caloric restriction should maintain or increase ALMI. A drop in ALMI during a fat-loss phase signals inadequate protein intake, insufficient training stimulus, or both. For Wolverine stack research, an ALMI increase of 0.3–0.6 kg/m² over 12 weeks indicates the protocol is working as intended.

The android-to-gynoid fat ratio quantifies fat distribution. Men typically have A/G ratios between 0.8 and 1.2; women between 0.5 and 0.8. Elevated A/G ratios correlate with metabolic syndrome, insulin resistance, and cardiovascular risk. Peptide protocols that reduce A/G ratio without significant total weight loss suggest favourable metabolic remodeling. A subject who drops from 1.1 to 0.9 while maintaining stable body weight has shifted fat distribution away from the visceral compartment. A meaningful outcome even if scale weight didn't move.

Wolverine Stack Research DEXA Scan Protocol Comparison

Protocol Element	Baseline Scan Timing	Mid-Cycle Scan Timing	Post-Cycle Scan Timing	Regional Metrics to Track	Professional Assessment
GH secretagogue monotherapy (GHRP-2, MK-677)	Week 0 (fasted, AM)	Week 6–8 (if 12+ week protocol)	Week 12–16 (4 weeks post-cessation)	Appendicular lean mass, android fat %, BMD lumbar spine	Expect 1.2–2.8 kg ALM gain, 0.5–1.2 kg android fat loss, BMD stable or +1–2%. Mid-cycle scan optional unless tracking fluid retention issues
Wolverine Stack (GH secretagogue + SARM)	Week 0 (fasted, AM)	Week 8 (mandatory for safety)	Week 12 + Week 16 (4 weeks post-cessation)	Appendicular lean mass, A/G ratio, femoral neck BMD	Expect 2.5–4.2 kg ALM gain, A/G ratio drop 0.1–0.3 units, BMD +2–4%. Mid-cycle scan identifies adverse bone or visceral fat trends early
Recomposition protocol (maintenance calories)	Week 0 (fasted, AM)	Week 10	Week 20 (end of protocol)	ALMI, android fat %, trunk lean mass	Expect ALMI +0.3–0.6 kg/m², android fat −10–18%, trunk lean mass stable. Slower timelines require extended protocols to show significance
Fat-loss protocol (deficit + peptides)	Week 0 (fasted, AM)	Not recommended (data confounded by glycogen)	Week 12 (immediately post-diet)	Appendicular lean mass retention, A/G ratio, total FM	Success = ALM retention within 5% of baseline, A/G ratio reduction, FM loss 80%+ from android region. Scan timing critical to avoid glycogen depletion artifacts

What If: Wolverine Stack Research DEXA Scan Scenarios

What If My Appendicular Lean Mass Dropped During the Protocol?

Increase protein intake to 1.8–2.2 g/kg body weight daily and verify training volume includes progressive overload every 2–3 weeks. Growth hormone secretagogues enhance protein synthesis capacity, but without adequate amino acid availability and mechanical tension, the signaling pathway stalls. A drop in appendicular lean mass during a Wolverine stack protocol suggests either insufficient dietary protein or training stimulus below the muscle protein synthesis threshold.

What If My Android Fat Percentage Increased While Gynoid Fat Decreased?

This pattern is uncommon during GH secretagogue protocols and suggests either measurement error or a confounding variable like increased alcohol intake or stress-driven cortisol elevation. GH secretagogues preferentially mobilise visceral fat through hormone-sensitive lipase activation. Android fat should decline faster than subcutaneous fat. Repeat the scan at the same facility using identical positioning protocols. If the pattern persists, review dietary adherence and sleep quality (cortisol spikes during chronic sleep restriction redistribute fat toward the android region).

What If My Bone Mineral Density Didn't Change After 16 Weeks?

BMD changes lag lean mass and fat mass responses by 8–12 weeks because bone remodeling is slower than soft tissue turnover. Sixteen weeks may be insufficient to detect significance if baseline BMD was already optimal. Growth hormone stimulates osteoblast activity, but the effect requires adequate calcium (1200–1500 mg/day) and vitamin D (serum 25-OH-D above 40 ng/mL). If supplementation was inadequate, extend the protocol to 24 weeks and re-scan. BMD increases of 1.5–3% typically emerge between weeks 20 and 28.

The Evidence-Based Truth About Wolverine Stack Research DEXA Scans

Here's the honest answer: DEXA scans are the only non-invasive tool that separates real tissue changes from noise. Bathroom scales measure everything. Muscle, fat, bone, water, glycogen, gut contents. Skinfold callipers depend entirely on technician skill and cannot measure visceral fat. Bioelectrical impedance scales are toys. DEXA scans quantify what changed, where it changed, and whether the protocol worked.

The mistake most researchers make is scanning too frequently. DEXA precision is excellent. Under 2% coefficient of variation for lean mass. But biological changes take time. Scanning every 4 weeks produces data confounded by hydration status, menstrual cycle timing (for female subjects), and training-induced glycogen fluctuations. The minimum meaningful interval is 8 weeks; 12-week intervals are better. Mid-cycle scans serve one purpose: identifying adverse trends (unexpected visceral fat accumulation, bone density decline) before protocol completion. If everything is tracking as expected, one baseline scan and one post-cycle scan are sufficient.

Annotation matters. DEXA software allows freeform notes attached to each scan. Record: date of last meal, time of scan, hydration status (fasted, post-workout, normal), any unusual variables (illness, injury, travel). When comparing scans 12 weeks apart, identical conditions matter more than identical calendar dates. A fasted AM scan compared to a post-meal PM scan introduces 1–2 kg of systematic error. Rendering the comparison meaningless.

How to Standardise DEXA Scan Conditions for Research Protocols

Scan-to-scan variability is the enemy of meaningful data. Biological changes in lean mass and fat mass occur at rates of 0.5–2 kg per month during optimised protocols. DEXA measurement error, if not controlled, can easily exceed that signal. Standardising scan conditions eliminates preventable noise.

Schedule all scans at the same time of day. Preferably first thing in the morning after an overnight fast. Lean mass measurements fluctuate 1–3% based on hydration status and recent carbohydrate intake. Glycogen binds water at a 1:3 ratio by mass; a subject who consumed 300 g of carbohydrates the night before a scan can show 1–1.2 kg of artificial lean mass gain purely from glycogen repletion. Fasted scans eliminate this confound.

Wear identical clothing across all scans. Or as close as possible. Standard protocol is minimal clothing (athletic shorts, sports bra or no shirt for male subjects). Metal objects (jewellery, belt buckles, underwire bras) create artifacts that the software flags as lean tissue. Remove all jewellery, keys, and phones before scanning. The machine's software can correct for some clothing mass, but consistency is better than correction.

Use the same DEXA machine at the same facility for all scans. Different manufacturers (Hologic, GE Lunar, Norland) use different calibration algorithms. A subject scanned on a Hologic Horizon at baseline and a GE Lunar iDXA at follow-up introduces systematic bias that cannot be corrected retrospectively. Even within the same manufacturer, older models versus newer models produce slightly different lean mass estimates. Lock in one machine for the duration of the research protocol.

Those small black pellets aren't just filler material. Remove them entirely and your artificial turf system would flatten under foot traffic, overheat by 15–20°F in direct sun, and wear through its backing within three years instead of ten. The research is clear: crumb rubber infill serves three distinct mechanical functions that no amount of fibre density can replace.

Build a pack

Researching more than one compound?

Build a multi-vial pack and the discount applies automatically as you add doses.

Start a pack

Questions

DEXA scans provide the most precise non-invasive body composition assessment available, with a coefficient of variation under 2% for lean tissue mass when scan conditions are standardised. This precision makes DEXA the gold standard for tracking longitudinal changes during peptide protocols — changes in appendicular lean mass as small as 0.8–1.2 kg can be detected with statistical confidence. However, accuracy depends entirely on consistent scan timing, hydration status, and using the same machine across all measurements.

Yes — DEXA scans quantify android fat percentage, which corresponds to visceral adipose tissue surrounding internal organs. Growth hormone secretagogues like MK-677 and GHRP-2 preferentially mobilise visceral fat through hormone-sensitive lipase activation, and this effect is measurable on DEXA. Research shows android fat reductions of 0.8–1.4 kg over 12–16 week protocols even when total body weight remains stable. The android-to-gynoid (A/G) ratio provides a standardised metric for tracking visceral fat distribution independent of total fat mass.

Research-grade DEXA scans typically cost between 75 and 150 USD per scan at sports performance facilities, university research labs, or imaging centres that cater to athletes and body composition research. Medical DEXA scans ordered for osteoporosis screening may be covered by insurance but use different scan protocols (faster, lower resolution) that are less suitable for tracking soft tissue changes. Confirm the facility uses a Hologic, GE Lunar, or Norland machine and can provide segmental body composition reports with android/gynoid fat breakdown and appendicular lean mass data.

DEXA scans use low-dose X-ray radiation — approximately 1–5 microsieverts per scan, equivalent to 1–2 days of natural background radiation exposure. The radiation risk from quarterly scans is negligible. The real risk is data noise: scanning every 4 weeks produces results confounded by hydration fluctuations, training-induced glycogen shifts, and menstrual cycle timing in female subjects. Biological tissue changes occur at rates of 0.5–2 kg per month; scanning more frequently than every 8 weeks introduces measurement variability that can exceed the signal you’re trying to detect.

DEXA scans measure tissue composition directly via differential X-ray absorption; bioelectrical impedance (BIA) estimates composition by passing an electrical current through the body and measuring resistance, which varies wildly based on hydration status and can swing 3–5% within a single day. Skinfold callipers measure only subcutaneous fat thickness and cannot assess visceral fat, lean mass distribution, or bone density. For research protocols requiring precision tracking of regional body composition changes, DEXA is the only method with sufficient accuracy — BIA and callipers introduce too much measurement error to detect the 1–3 kg tissue shifts typical of 12-week peptide protocols.

Appendicular lean mass (arms and legs) and trunk lean mass (torso, including organs) respond differently to training and peptide protocols. Resistance training increases appendicular lean mass through muscle hypertrophy, while trunk lean mass — which includes organ tissue and cannot be trained — may decrease slightly due to fat loss around organs or reduced gut contents during caloric restriction. A Wolverine stack protocol can produce 2–3 kg of appendicular lean mass gain while trunk lean mass drops 1–2 kg, resulting in modest whole-body lean mass change despite significant muscle tissue accrual where it matters.

Bone mineral density (BMD) increases of 1.5–3.2% over 24-week growth hormone secretagogue protocols reflect enhanced osteoblast activity — the cells responsible for bone formation. Growth hormone stimulates IGF-1 production, which activates bone remodeling pathways that favour formation over resorption. This effect is most pronounced in the lumbar spine and femoral neck, the regions most vulnerable to age-related bone loss. Increases in BMD during a research protocol indicate the GH secretagogue is exerting systemic anabolic effects beyond muscle tissue, provided calcium intake (1200–1500 mg/day) and vitamin D status (serum 25-OH-D above 40 ng/mL) are adequate.

Mid-cycle scans (Week 6–8) are optional for growth hormone monotherapy protocols but recommended for Wolverine Stack protocols combining GH secretagogues with other compounds. The mid-cycle scan serves as an early warning system: if appendicular lean mass isn’t increasing or android fat isn’t declining by Week 8, you can adjust training volume, protein intake, or peptide dosing before completing the full 12–16 week protocol. For straightforward GH monotherapy, one baseline scan and one post-cycle scan 4 weeks after cessation are sufficient — the additional cost of a mid-cycle scan rarely provides actionable information.

Record the following with every scan: exact time of scan (AM/PM), hours since last meal, hydration status (fasted, post-workout, normal), menstrual cycle day (for female subjects), any illness or injury in the prior 7 days, and unusual variables like recent travel or sleep disruption. These notes allow you to identify confounding factors when comparing scans 8–12 weeks apart. A scan taken fasted at 8:00 AM should be compared to another fasted 8:00 AM scan — comparing fasted AM to post-meal PM introduces 1–2 kg of systematic hydration and gut-content error that can obscure real tissue changes.

Yes — DEXA software segments the body into anatomical regions (right arm, left arm, right leg, left leg, trunk, head) and reports lean tissue mass for each. This allows you to track unilateral training effects or identify asymmetries. For example, a protocol emphasising lower-body hypertrophy should show greater lean mass increases in the legs than arms. Regional segmentation is critical for research because whole-body lean mass changes can mask meaningful regional shifts — a subject who gains 2 kg in legs and loses 1 kg in trunk lean mass shows only 1 kg net gain on whole-body measures, obscuring the actual training adaptation.

Track these five metrics in order of importance: (1) Appendicular lean mass index (ALMI) — lean mass in arms and legs divided by height squared, isolates muscle tissue changes independent of body size; (2) Android fat percentage — quantifies visceral fat, the most metabolically harmful compartment; (3) Android-to-gynoid (A/G) fat ratio — lower values indicate healthier fat distribution; (4) Bone mineral density (BMD) in lumbar spine and femoral neck — should stabilise or improve; (5) Trunk lean mass — should remain stable or increase slightly. Whole-body body fat percentage is the least informative metric because it aggregates changes across all regions without distinguishing where fat was lost or gained.

RESEARCH USE ONLY · NOT EVALUATED BY THE FDA