09/19/2026
Skin Splitter is a high-stimulant pre-workout with ingredients for energy, focus, muscle pumps, and workout performance. Its strongest supported benefits are energy and exercise performance; appetite suppression and fat loss are less certain.
The amounts below are per one scoop, as shown on the label.
Ingredients
What they do
Focus
L-tyrosine 2,000 mg, caffeine 350 mg, L-theanine 250 mg, huperzia extract 20 mg
Caffeine improves alertness. Tyrosine supports production of brain chemicals involved in attention. Theanine may help smooth caffeine’s stimulation. Huperzia supplies huperzine A, marketed for memory and concentration, although workout benefits are not well established.
Energy
Caffeine 350 mg, theobromine 400 mg, alpha-yohimbine 3 mg
Caffeine can reduce perceived effort and help you feel more awake during training. Theobromine and alpha-yohimbine add stimulation, but feeling more stimulated does not necessarily mean better performance.
Thermogenic
Mainly caffeine and alpha-yohimbine
Caffeine can temporarily increase energy expenditure. That does not establish meaningful fat loss from this formula. Sweating more is not proof of burning more body fat.
Appetite suppressant
Mainly the stimulant ingredients
Some people may notice temporarily reduced hunger. This formula is not established as a reliable appetite suppressant, and responses vary.
Pump formula
L-citrulline 6,000 mg, glycerol powder/HydroPrime 1,500 mg, taurine 2,000 mg
Citrulline supports nitric oxide production, which helps blood vessels relax. Glycerol supports fluid retention, and taurine helps regulate fluid balance in cells. These are intended to support muscle fullness and pumps, though performance results vary.
Creatine added
Creatine hydrochloride 3,000 mg
Creatine supports rapid energy production during lifting and repeated hard efforts. Benefits build with consistent use. Creatine monohydrate has much stronger research support than the HCl form.
Caffeine and creatine have substantial performance evidence; research on citrulline and many other pre-workout ingredients is less consistent. NIH exercise supplement review
The remaining ingredients provide additional support:
* Beta-alanine — 4,000 mg: Helps build muscle carnosine, which buffers acidity during hard exercise. Benefits develop over weeks; the tingling sensation is a side effect, not a measure of effectiveness.
* Betaine anhydrous — 3,000 mg: Supports cellular fluid balance and may modestly help strength or power, but findings are mixed. NIH performance evidence
* CDP-choline — 500 mg: Supplies choline used in cell membranes and acetylcholine, a chemical involved in attention and muscle signaling. Its presence does not prove improved workout focus.
* Niacin — 10 mg and vitamin B12 — 6 mcg: Support normal metabolism and nerve function; they do not act like stimulants.
* Black pepper extract — 5 mg: Added to influence absorption of certain compounds; it can also affect medication handling.
The main caution is the stimulant combination: one scoop already contains 350 mg caffeine, plus theobromine and alpha-yohimbine. That can cause racing heart, anxiety, increased blood pressure, and sleep problems. Avoid combining it with other pre-workouts, energy drinks, or fat burners. Alpha-yohimbine is related to yohimbine but is a different compound with limited human safety evidence; yohimbine itself has significant cardiovascular safety concerns. NIH weight-loss supplement review, NCCIH yohimbe safety
