--- product_id: 581838869 title: "Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout,403mg Caffeine, ..." brand: "underground bio labs" price: "15385 kr" currency: ISK in_stock: false url: https://www.desertcart.is/products/581838869-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg store_origin: IS region: Iceland --- # 403mg multi-source caffeine boost 8g L-Citrulline Malate for insane pumps 500mg Lion’s Mane for mental edge Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout,403mg Caffeine, ... **Brand:** underground bio labs **Price:** 15385 kr **Availability:** ❌ Out of Stock ## Summary > 💥 Unlock your inner beast with SKULL — where focus meets fury! ## Quick Answers - **What is this?** Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout,403mg Caffeine, ... by underground bio labs - **How much does it cost?** 15385 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/581838869-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg) ## Best For - underground bio labs enthusiasts ## Why This Product - Trusted underground bio labs brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Tunnel Vision Focus:** 600mg Alpha GPC blocks distractions so you stay locked in on your goals. - • **Massive Muscle Pumps:** 8g L-Citrulline Malate and 1000mg Agmatine Sulfate deliver vascularity that turns heads. - • **Sustained Energy Surge:** 403mg caffeine from 3 sources powers relentless endurance without the crash. - • **Elite Mental Performance:** 500mg Lion’s Mane sharpens focus and cognition for laser-like workout intensity. - • **Enhanced Absorption & Endurance:** 50mg AstraGin and 50mg Senactiv optimize nutrient uptake and prolong stamina. ## Overview Underground Bio Labs Skull Pre-Workout is a high-stimulant, nootropic-powered formula designed for professionals who demand peak mental clarity, explosive energy, and massive muscle pumps. Featuring 500mg Lion’s Mane for cognition, 403mg caffeine from three sources for sustained energy, and 8g L-Citrulline Malate for vascular pumps, this 40-serving powder delivers tunnel vision focus and endurance support with AstraGin and Senactiv. Perfect for crushing intense workouts while maintaining razor-sharp concentration. ## Description Buy Underground Bio Labs Skull Pre-Workout Dragonfruit Watermelon Candy 40sv | Panda Supps SKULL pre-workout combines elite focus, tunnel vision, huge pumps, and 403mg caffeine for relentless endurance! on desertcart.com ✓ FREE SHIPPING on qualified orders ## Features - MENTAL PERFORMANCE: 500 MG Lion’s Mane COGNITION: 100 Mg CognatiQ - PUMP: 1000 MG Agmatine Sulfate PUMP: 8G L-Citrulline Malate - ENERGY: 403MG Caffeine (3 Different Sources) ABSORBTION: 50 MG AstraGin ENDURANCE: 50 MG Senactiv - FOCUS: 3G L-Tyrosine TUNNEL VISION: 600 MG Alpha GPC ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CMJ8CS7R | | ASIN | B0CMJ8CS7R | | Age Range Description | Adult | | Best Sellers Rank | #99,630 in Health & Household ( See Top 100 in Health & Household ) #217 in Sports Nutrition Pre-Workout Powders | | Brand Name | Underground Bio Labs | | Customer Reviews | 4.2 4.2 out of 5 stars (32) | | Date First Available | November 4, 2023 | | Flavor | Skull Crusher | | Item Dimensions | 3.5 x 3.5 x 6 inches | | Item Form | Powder | | Item Highlight | Panda Supps SKULL pre-workout combines elite focus, tunnel vision, huge pumps, and 403mg caffeine for relentless endurance! | | Manufacturer | Underground Bio Labs | | Manufacturer | Underground Bio Labs | | Manufacturer Part Number | SkullPre | | Model Name | "SkullPre | | Number of Items | 1 | | Product Benefits | Energy Management | | Product Dimensions | 3.5 x 3.5 x 6 inches; 1.12 pounds | | Total Servings Per Container | 40 | | UPC | 051497423186 | | Unit Count | 14.81 Ounce | ## Product Details - **Age Range (Description):** Adult - **Brand:** Underground Bio Labs - **Flavor:** Skull Crusher - **Item Form:** Powder - **Item dimensions L x W x H:** 3.5 x 3.5 x 6 inches - **Model Name:** "SkullPre - **Number of Items:** 1 - **Product Benefits:** Energy Management - **Servings per Container:** 40 - **Unit Count:** 14.81 Ounce ## Images ![Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout,403mg Caffeine, ... - Image 1](https://m.media-amazon.com/images/I/81wDHp-Q6aL.jpg) ## Available Options This product comes in different **Flavor** options. ## Questions & Answers **Q: How much should I take if I'm new to high-stimulant pre-workouts?** A: Start with 1/2 to 1 scoop mixed in 8 oz of water. Assess tolerance before increasing. Do not exceed 2 scoops per serving. **Q: When should I take SKULL before my workout?** A: Consume SKULL 20 minutes before your workout or exercise session for best results. **Q: How do I mix SKULL properly?** A: Add 1 to 2 scoops to 8 oz of water and mix vigorously until fully dissolved. Adjust water amount to your taste preference. **Q: How much caffeine is in a full serving of SKULL?** A: A full 2 scoop serving contains 403 mg of caffeine sourced from 3 different sources. Start with a half scoop if you are sensitive to stimulants. ## Frequently Bought Together - Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout,403mg Caffeine, Tunnel Vision Focus,Pumps, Unparalled Energy (40 Scoops) (Dragonfruit Watermelon Candy) Skull Crusher - Underground Bio Labs Panda Supps Pump, Pre-Workout, No-Clump Formula w/10G L-Citrulline Malate, Alpha GPC, Lions Mane,CognatiQ™,VasoDrive-AP® 40 Scoops (Rainbow Dragonfruit) - Underground Bio Labs™ Panda Supps: Rampage, Extreme Pre-Workout, High Stim, Maximum Pump, Focus, and Energy,(50 Servings) (Kiwi-Lychee-Pinapple Flavor AKA Goblin Juice) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/581838869-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg](https://www.desertcart.is/products/581838869-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-10-30*