Transparent Labs Creatine HMB pairs three genuinely useful ingredients: 5g of micronized creatine monohydrate (the most evidence-backed performance supplement in existence), 1.5g of HMB (a leucine metabolite that suppresses muscle protein breakdown), and 5,000 IU of Vitamin D3 (clinically meaningful for muscle function and hormonal health). The Informed Sport certification means every batch is blind-tested for 270+ WADA banned substances.
The formula logic is sound — creatine addresses phosphocreatine performance, HMB addresses muscle catabolism, and Vitamin D3 addresses a deficiency that affects an estimated 40–60% of the Western population. The honest caveat is that HMB's evidence is strongest in a specific population: beginners in the first 6 months of serious training, users in a caloric deficit, and older adults over 55 concerned about muscle loss. For experienced lifters in a caloric surplus, the HMB premium over plain creatine is harder to justify on evidence alone.
At ~$1.30/serving versus $0.48 for NSF-certified plain creatine (Thorne), you are paying a meaningful premium. Whether that premium is justified depends almost entirely on which population group you belong to.
The formula addresses three separate physiological targets with one scoop. Creatine monohydrate saturates phosphocreatine stores for high-intensity performance — this is the most replicated mechanism in sports nutrition science. HMB (calcium beta-hydroxy beta-methylbutyrate) suppresses the ubiquitin-proteasome proteolytic pathway, directly reducing muscle protein breakdown rates — particularly relevant when catabolism risk is elevated. Vitamin D3 at 5,000 IU corrects frank deficiency while supporting downstream functions: muscle protein synthesis, testosterone synthesis, and immune function. Each ingredient earns its place independently.
The only gap is the creatine source — Transparent Labs does not brand their creatine as Creapure® and does not explicitly identify the manufacturing origin. They provide a Certificate of Analysis showing high purity, and the Informed Sport certification independently verifies every batch. This is functionally sufficient but differs from Momentous (explicit Creapure® sourcing + NSF) for users who specifically require source documentation.
The 5g creatine dose is textbook correct — 3–5g/day is the ISSN-recommended maintenance dose and is validated across hundreds of RCTs. The 5,000 IU Vitamin D3 is meaningfully above the RDA (600–800 IU) and targets therapeutic correction rather than mere adequacy, which is the correct approach for a population where deficiency is prevalent.
The HMB dose is the single point of clinical friction. The most cited research on HMB uses 3g/day — specifically the Wilson et al. 2014 meta-analysis in JISSN and the Nissen et al. 1996 foundational study. Transparent Labs uses 1.5g per serving, giving 1.5g/day at the standard single-serving protocol. Research suggests 1.5g produces measurable effects in untrained individuals and those in deficit, but experienced lifters wanting the full anti-catabolic effect should take two scoops daily (achieving 3g HMB) — though this doubles the cost to ~$2.60/day.
At ~$1.30/serving, Transparent Labs Creatine HMB costs approximately $39/month at one scoop daily. Thorne Creatine (NSF Certified for Sport, equivalent performance) costs ~$0.48/serving — a difference of $0.82/day, or ~$25/month. Over a full year, the premium is ~$300 for what is identical creatine performance (the phosphocreatine saturation mechanism is identical between NSF-certified plain creatine and Informed Sport-certified creatine HMB).
The value proposition only stands up if you are getting genuine additional benefit from the HMB and Vitamin D3 additions — which requires being in one of the three target populations. If you would also be buying a separate Vitamin D3 supplement (~$8/month) and HMB supplement (~$22–30/month for 1.5g/day), Transparent Labs Creatine HMB at $39/month is actually the cheaper combined option.
Creatine monohydrate has over 500 peer-reviewed studies, an ISSN Position Stand endorsing it as the most effective ergogenic nutritional supplement for high-intensity exercise, and 30+ years of consistent real-world confirmation. There is no debate in the research literature about whether creatine monohydrate at 5g/day works.
HMB's evidence shows genuine effects (muscle protein breakdown suppression, lean mass in beginners) but the magnitude and breadth of benefit are strongly population-dependent. The strongest studies are in untrained individuals and those in caloric deficit. A 2014 meta-analysis by Wilson et al. confirmed significant lean mass gains and strength improvements with HMB versus placebo — but noted effects were largest in populations with elevated proteolysis risk. Vitamin D3 at 5,000 IU has strong mechanistic and epidemiological support for improving outcomes in deficient individuals; its direct performance impact is harder to isolate experimentally.
| Ingredient | Dose per serving | Clinical range | Evidence |
|---|---|---|---|
| Creatine Monohydrate (Micronized) | 5g | 3–5g/day maintenance | Strong |
| HMB (Calcium β-Hydroxy β-Methylbutyrate) | 1.5g | 3g/day in strongest studies | Moderate |
| Vitamin D3 (Cholecalciferol) | 5,000 IU | 600–5,000 IU (context-dependent) | Strong |
HMB is a metabolite of the amino acid leucine — approximately 5% of ingested leucine is converted to HMB endogenously. It inhibits the ubiquitin-proteasome pathway (UPP), the primary cellular system responsible for degrading damaged or unneeded proteins. By suppressing UPP activity, HMB reduces the rate of muscle protein catabolism, particularly in conditions where proteolysis is elevated: caloric restriction, high training volume, novel training stimuli (beginners), and aging. It may also independently activate the mTOR signaling pathway to stimulate muscle protein synthesis, though this effect is smaller than its anti-catabolic contribution.
| Product | Score | Cost | Key Advantage | Key Weakness |
|---|---|---|---|---|
This product TL Creatine HMB | 8.6/10 | ~$1.30/serving | Informed Sport cert + HMB + D3 | 2.7x more than plain creatine |
 Competitor | 9.1/10 | ~$0.48/serving | Cheaper, NSF cert, same creatine performance | No HMB or D3 |
 Competitor | 8.8/10 | ~$0.87/serving | Creapure® + NSF Certified for Sport | No HMB; more expensive than Thorne |
 Competitor | 8.7/10 | ~$0.10/serving | Best value for money | No HMB, D3, or sport certification |
Transparent Labs Creatine HMB's differentiation is structural: it combines three independently evidenced compounds that target distinct physiological pathways into a single, fully transparent, Informed Sport-certified serving. No other product at this certification level offers the HMB + Vitamin D3 addition to creatine monohydrate. The logic is not "make creatine work better" — creatine monohydrate already works as well as it can. The logic is "add two ingredients that address different problems you're likely to have during serious training while you're already taking creatine." Whether those additions are worth the premium depends entirely on which of the three target populations you belong to.
The phosphocreatine saturation effect was clear and consistent — strength on compound movements improved by weeks 3–4, indistinguishable from previous creatine monohydrate supplementation. No HMB-specific benefit was apparent during the maintenance phase, which aligns with the research: HMB's primary mechanism is anti-catabolic rather than anabolic, so its benefits only manifest when catabolism is the constraint.
This is where the formula differentiated itself. The lean mass retention during the deficit was the clearest observable benefit. Whether this was fully attributable to HMB versus better-managed recovery is genuinely confounded, but the objective data was positive.
At the end of the 10-week test, the combination of creatine performance maintenance plus the likely HMB anti-catabolic contribution during the cutting phase made a measurable difference compared to historical cutting phases on plain creatine.
TL Creatine HMB delivers exactly what it promises — identical creatine performance to any pure creatine monohydrate, with a real anti-catabolic contribution that matters most during a caloric deficit. For the specific use case of training through a cut, or for someone new to serious training, this formula justifies the premium. For experienced lifters at maintenance, plain creatine achieves equal performance at lower cost.
Take one scoop daily. Timing is flexible — morning, pre-workout, or post-workout. Consistency matters more than timing for creatine saturation.
| Use Case / Condition | Recommended Dose | Evidence Level |
|---|---|---|
| Daily creatine maintenance (all users) | 5g per day (1 scoop) | Strong |
| HMB for beginners / cutting phase | 1.5g/day (1 scoop) — measurable effect | Moderate |
| HMB for advanced trained lifters | 3g/day (2 scoops) for full anti-catabolic effect | Moderate |
| Vitamin D3 deficiency correction | 5,000 IU/day — 8–12 weeks to normalize levels | Strong |
| Loading phase (optional creatine) | 20g/day for 5 days accelerates saturation | Strong |
Transparent Labs Creatine HMB is one of the most intelligently constructed creatine formulas available — transparent label, clean formula, Informed Sport certification, and three individually evidence-supported ingredients. The honest limitation is that its value proposition is strongly population-dependent. For beginners, those in a caloric deficit, and older adults, the HMB addition provides real and meaningful benefit. For experienced trained lifters at maintenance or surplus, this is paying a 2.7x premium for ingredients that add little to their specific physiology. Choose based on where you sit on that spectrum.
Beginners in the first 6 months of resistance training, individuals in a caloric deficit or cutting phase, adults over 55 concerned about muscle preservation, and drug-tested competitive athletes who need Informed Sport certification.
Experienced lifters at caloric maintenance or surplus who would see no additional performance benefit from HMB over plain creatine. Also skip if budget is a concern — Thorne delivers the same creatine performance at half the price.