HardRock Supplements - Yellow Bullet Xtreme - 60 Capsules

HardRock Supplements Yellow Bullet Xtreme is the higher-potency version of the classic Yellow Bullet formula — 50mg of Ephedra viridis extract combined with 350mg of caffeine, along with synephrine, phenylethylamine HCl, yohimbine, and supporting compounds in the Zyplex Blend. One capsule per serving. 60 capsules per bottle. This is a high-stimulant, ephedra-based thermogenic — not a general wellness supplement. Designed for experienced stimulant users with a clear understanding of what they are taking and why.†

Note: Yellow Bullet Xtreme contains 350mg of caffeine per single capsule — equivalent to approximately 3-4 cups of coffee. Do not combine with other caffeine or stimulant sources. Not for caffeine-sensitive individuals, beginners, or anyone without an established stimulant tolerance.

Supplement Facts — HardRock Supplements Yellow Bullet Xtreme (Per 1 Capsule Serving)

Vitamins

• Vitamin B3 (Niacin) — 30mg (188% DV)
• Vitamin B5 (Pantothenic Acid) — 15mg (300% DV)
• Vitamin B6 (Pyridoxine HCl) — 12mg (706% DV)
• Vitamin B9 (Folic Acid) — 9mcg (36% DV)
• Chromium — 9mcg (26% DV)

Zyplex Blend — 739mg

• Ephedra viridis extract — 50mg
• Caffeine (as 1,3,7-Trimethylxanthine) — 350mg
• Phenylethylamine HCl
• Synephrine (as 4-[1-hydroxy-2-(methylamino)ethyl]phenol octanoic acid)
• Yohimbine (as 17a-hydroxy-yohimban-16a-carboxylic acid methyl ester)
• Glucuronolactone
• Theophylline (as 7-[2-hydroxy-3-(2-hydroxyethyl-methylamino)propyl]-1,3-dimethylpurine-2,6-dione)

Other Ingredients: Gelatin, Magnesium Stearate, Silica, Titanium Dioxide, FD&C Red #40, Yellow #5, Yellow #6, Blue #1

60 capsules. 60 servings. 1 capsule per serving.

This product does not contain ephedra alkaloids (ephedrine). It contains Ephedra viridis plant extract.

What's Inside Yellow Bullet Xtreme — The Ingredient Breakdown

The Ephedra vs. Ephedrine Distinction

Understanding the difference between ephedra and ephedrine is important before purchasing this product. The FDA banned ephedrine alkaloids — specifically ephedrine, pseudoephedrine, and norephedrine — from dietary supplements in 2004 following safety concerns at high doses over extended periods. This ban applies to ephedra alkaloids, not to the ephedra plant itself. Ephedra viridis is a species of ephedra (Mormon tea) that grows in the American Southwest and is significantly lower in ephedrine alkaloid content than Ephedra sinica (Ma Huang), the traditional Chinese botanical that was the subject of the 2004 ban. Yellow Bullet Xtreme contains Ephedra viridis plant extract — not ephedrine alkaloids — and is legal to sell as a dietary supplement in the United States.†

Key Active Compounds

Ephedra viridis (50mg). Ephedra viridis extract provides the thermogenic and adrenergic foundation of the formula. While its alkaloid content is lower than Ephedra sinica, the plant still contains compounds that stimulate adrenergic receptors — increasing metabolic rate, supporting lipolysis (fat cell breakdown), and elevating body temperature. In Yellow Bullet Xtreme, the 50mg dose represents double the 25mg in the original Yellow Bullet formula and is the primary differentiator between the two products.†

Caffeine Anhydrous (350mg). At 350mg per single capsule, this is a very high caffeine dose — approximately double the standard pre-workout serving and equivalent to a therapeutic dose in the clinical literature on caffeine's performance effects. Caffeine at this level produces pronounced CNS stimulation, significantly elevated thermogenesis through beta-adrenergic receptor activation, acute appetite suppression, and meaningful increases in metabolic rate. The combination of ephedra extract and caffeine reflects the ECA-style stack protocol (Ephedra + Caffeine + Aspirin) that was widely used in the fat loss community prior to the 2004 alkaloid ban — the caffeine + ephedra combination remains the most studied sympathomimetic stack in the weight loss supplement literature.†

Phenylethylamine HCl. PEA is an endogenous trace amine that stimulates catecholamine release — dopamine, norepinephrine, and adrenaline — producing acute mood elevation, increased alertness, and appetite suppression. PEA is rapidly metabolized by monoamine oxidase (MAO) enzymes, which limits its duration of action when taken orally without a MAO inhibitor. Its subjective effect window is approximately 15-30 minutes, contributing a sharp initial mood and energy elevation that complements the longer-duration caffeine and ephedra effects.†

Synephrine. Synephrine is a naturally occurring alkaloid found primarily in bitter orange (Citrus aurantium) with beta-3 adrenergic receptor agonist activity — it stimulates lipolysis (fat breakdown from adipocytes) and increases basal metabolic rate through a mechanism similar but structurally distinct from ephedrine. Synephrine is considered a milder adrenergic stimulant than ephedrine, with less cardiovascular impact at comparable doses. Its inclusion alongside ephedra extract and caffeine rounds out the adrenergic stimulation in the formula.†

Yohimbine. Yohimbine is an alpha-2 adrenergic receptor antagonist — it blocks the receptor that normally inhibits fat breakdown, removing the "brake" on lipolysis in adipose tissue. Its effect is most pronounced in alpha-2 receptor-dense fat deposits — specifically the lower body (glutes, hips, thighs in women; lower abdomen in men) — areas that are typically resistant to fat loss during caloric restriction. Yohimbine's effects are blunted by insulin, making fasted dosing substantially more effective for its targeted lipolytic mechanism. The combination of yohimbine (alpha-2 blockade) with caffeine and synephrine (beta-adrenergic activation) creates complementary lipolytic pressure on fat cells simultaneously from two receptor pathways.†

Glucuronolactone. Glucuronolactone is a naturally occurring metabolite of glucose involved in glucuronidation — a liver detoxification pathway. In energy formulas it has been used for its proposed effects on physical and mental performance and as a liver-supportive compound. It is commonly found in energy drinks and was included in early versions of Red Bull.†

Theophylline. Theophylline is a xanthine alkaloid closely related to caffeine that produces bronchodilation, mild CNS stimulation, and additional thermogenic effects. It is found naturally in tea leaves. Its inclusion adds to the overall stimulant and thermogenic load of the formula and has some synergistic interaction with caffeine.†

B Vitamins (B3, B5, B6, B9). The B vitamin complex in Yellow Bullet Xtreme supports the metabolic pathways that the stimulant compounds are activating — B vitamins are essential cofactors in energy metabolism, neurotransmitter synthesis, and adrenal function. B6 in particular is a cofactor for the synthesis of dopamine and norepinephrine, supporting the catecholamine production that the PEA and stimulant load demands.†

Chromium. Chromium supports insulin sensitivity and blood glucose regulation — relevant for appetite control and preventing the glucose dysregulation that can accompany high-stimulant use over time.†

Yellow Bullet vs. Yellow Bullet Xtreme

The primary formula difference is the ephedra dose: Yellow Bullet (original) contains 25mg of Ephedra viridis, while Yellow Bullet Xtreme doubles it to 50mg. Both contain the same core ingredient architecture — ephedra, caffeine, PEA, synephrine, yohimbine, glucuronolactone. The caffeine in Xtreme is 350mg vs. approximately 300mg in the original. For first-time users of this category, the original Yellow Bullet at 25mg ephedra is the appropriate starting point to assess tolerance before moving to the Xtreme formulation. For experienced users who have established a clear tolerance to the original and are looking for a more aggressive thermogenic effect, the Xtreme provides that step up.†

Frequently Asked Questions About Yellow Bullet Xtreme

1. Is ephedra legal?
   Yes. The 2004 FDA ban specifically banned ephedra alkaloids — the compounds ephedrine, pseudoephedrine, and norephedrine. The ban does not extend to ephedra plant extracts that are low in alkaloid content. Yellow Bullet Xtreme uses Ephedra viridis — a species with significantly lower alkaloid content than the Ma Huang (Ephedra sinica) used in pre-ban products — and is legally sold as a dietary supplement in the United States. The label explicitly states this product does not contain ephedra alkaloids.†
2. How does Yellow Bullet Xtreme compare to traditional ECA stacks?
   The classic ECA (Ephedra + Caffeine + Aspirin) stack from the pre-2004 era used Ephedra sinica standardized for ephedrine alkaloids — specifically 20-25mg of actual ephedrine per dose — combined with 200mg of caffeine and 300mg of aspirin. Yellow Bullet Xtreme's Ephedra viridis extract is not standardized for ephedrine alkaloids in the same way and the alkaloid content is lower than Ephedra sinica. The caffeine dose (350mg) substantially exceeds the traditional ECA caffeine component. The formula is designed to provide an analogous thermogenic and energy experience through a legal combination of compounds rather than through ephedra alkaloids specifically.†
3. Should I cycle Yellow Bullet Xtreme?
   Yes. Tolerance to stimulants, particularly at high caffeine doses, builds relatively quickly. Continuous daily use will reduce effectiveness as the adrenergic receptors downregulate in response to chronic high-dose stimulation. A standard cycling protocol for high-stimulant ephedra products is 4-6 weeks of use followed by a 2-4 week break, during which stimulant use is reduced or eliminated to allow receptor sensitivity to recover. Do not increase dose beyond one capsule in an attempt to compensate for reduced effects — this significantly increases cardiovascular risk.†
4. Can I take Yellow Bullet Xtreme with other supplements?
   Do not combine with other stimulant-containing products — no pre-workouts, no additional caffeine, no other fat burners, no yohimbine-only products. The 350mg caffeine load in a single capsule is already at the high end of safe single-dose caffeine intake for most individuals. Adding additional stimulants from other products compounds cardiovascular and neurological risk significantly. Yellow Bullet Xtreme should be the only stimulant source in your stack while using it. Stacking with non-stimulant fat loss support like protein powder, creatine, and electrolytes is appropriate and does not create interaction risk.†

How to Take HardRock Supplements Yellow Bullet Xtreme

Take 1 capsule as needed. For best results, take in the morning or early afternoon, 30 minutes before a meal, with a full glass of water. Do not take within 6-8 hours of intended sleep — the 350mg caffeine dose and additional stimulant compounds will disrupt sleep if taken too late in the day. Do not exceed 1 capsule in any 24-hour period. Start with the original Yellow Bullet (25mg ephedra) before progressing to Xtreme if you are new to ephedra supplements. Avoid taking on an empty stomach until tolerance is assessed. Drink plenty of water throughout the day — stimulants at this dose level have diuretic effects and dehydration amplifies cardiovascular strain.†

Why Buy at Get Yok'd

• Real-time inventory across all five Southern California stores
• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
• Authorized retailer of HardRock Supplements
• One of the best loyalty programs in the supplement industry — earn rewards on every purchase
• Owned and operated by fitness enthusiasts who actually use what we sell

Who Should Not Take Yellow Bullet Xtreme

• Not for use by individuals under 18 years of age
• Not for use by women who are pregnant or nursing
• Do not use if you have any cardiovascular condition — including heart disease, irregular heartbeat, high blood pressure, history of stroke, or any diagnosed heart condition. The combination of ephedra extract, 350mg caffeine, synephrine, and yohimbine produces significant cardiovascular stimulation.
• Do not use if you have diabetes — stimulants at this level significantly affect glucose metabolism and insulin sensitivity
• Do not use if you have thyroid disease — adrenergic stimulants interact directly with thyroid hormone activity
• Do not use if you have anxiety, panic disorder, or any psychiatric condition — 350mg caffeine combined with PEA and yohimbine can produce or markedly worsen anxiety and panic symptoms
• Do not use if you have kidney or liver disease
• Do not use if you are taking MAO inhibitors (MAOIs) — the combination of PEA and MAOIs is dangerous and potentially life-threatening
• Do not use if taking any prescription medications without explicit physician approval — particularly antidepressants, blood pressure medications, ADHD medications, or any cardiovascular medications
• Do not combine with alcohol
• Do not combine with other stimulant-containing supplements
• Avoid foods with tyramine (aged cheese, red wine, cured meats, fermented foods) while using this product — yohimbine has mild MAO-inhibiting properties that can interact with tyramine-containing foods
• Taking more than the recommended serving may result in heart attack, stroke, seizure, or death. Do not exceed the recommended dose under any circumstances.
• Keep out of reach of children
• Consult a physician before use if you have any medical condition or are taking any medication

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.