VMI Sports | KXR Pre-Workout | 30 Servings

VMI Sports KXR Pre-workout is a low-stim, ketone-forward pre-workout built around a very different strategy than the usual category formula. Instead of chasing mega-caffeine, giant pump doses, or a kitchen-sink blend, this formula centers on 7.2 grams of goBHB® beta-hydroxybutyrate salts, clinically relevant magnesium support, and a restrained 100mg caffeine dose from Robusta coffee. The result is a product designed for smooth training energy, electrolyte support, and mental steadiness rather than a dramatic stimulant spike.

The foundation is the goBHB® complex: 2.4g calcium beta-hydroxybutyrate, 2.4g sodium beta-hydroxybutyrate, and 2.4g magnesium beta-hydroxybutyrate. BHB is the primary circulating ketone body used as an alternative fuel substrate, especially relevant in low-carb or fasted states. In practical terms, this can translate to a more even sense of energy and less reliance on a heavy stimulant load to feel ready to train. goBHB® matters because it is a branded raw material from Compound Solutions, giving the formula a higher-quality exogenous ketone source than generic label dressing.

Magnesium is another standout here. The label yields 295mg magnesium total, sourced from magnesium beta-hydroxybutyrate and TRAACS® magnesium bisglycinate chelate, which places it just under the 310-420mg daily clinical range commonly referenced in the literature. That is still a meaningful amount in a pre-workout context. Magnesium is a cofactor in over 300 enzyme systems, stabilizes ATP, supports neuromuscular function, and plays a central role in energy metabolism. Using Albion’s TRAACS® chelated form is a quality decision because bisglycinate chelates are known for strong tolerability and absorption compared with harsher mineral forms.

Chromium is included at 200mcg as TRAACS® chromium nicotinate glycinate chelate, which sits at the bottom of the researched 200-1000mcg range. Chromium works by enhancing insulin receptor signaling through chromodulin, helping support glucose uptake and glycemic control. In a formula that also contains BHB and a small amount of niacin, this makes physiological sense: it supports fuel handling rather than simply forcing stimulation. The niacin dose itself is tiny at 3.4mg, far below pharmacologic flush doses, so it functions here as part of the chromium chelate rather than as a meaningful standalone performance ingredient.

For mental performance, VMI added 300mg L-Tyrosine, 50mg Alpha-GPC, and 100mg caffeine. Caffeine is one of the most validated ergogenics in sports nutrition, but the research-backed performance range is generally 200-400mg or roughly 3-6 mg/kg bodyweight. At 100mg, this is intentionally light. You should expect alertness and motivation, not a full high-stim pre-workout kick. L-Tyrosine is the precursor to dopamine, norepinephrine, and epinephrine and is most useful under acute stress, but its studied range is dramatically higher at roughly 100-150mg/kg, making 300mg an underdosed support layer rather than a primary nootropic dose. The same applies to Alpha-GPC: 50mg is well below the doses commonly used for acute performance or power output, so it is best viewed as label support rather than a major driver of the experience.

The formula is fully disclosed, and that matters. There are no proprietary blends hiding weak inclusions. Compared with much of the pre-workout category, that transparency is a real strength, even when some ingredients are below ideal research ranges. Day 1, expect smooth energy, subtle focus, and a more hydrated, ready-to-train feel than a hard stimulant rush. Over 2-4 weeks, the benefits most likely to matter are consistency, mineral support, and a reliable low-stim pre-workout rhythm that does not beat up your nervous system the way heavy-stim formulas can.

How to Use VMI Sports | KXR Pre-workout