---
product_id: 590415146
title: "Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane)"
brand: "underground bio labs"
price: "AR$191168"
currency: ARS
in_stock: true
reviews_count: 8
category: "Underground Bio Labs"
url: https://www.desertcart.com.ar/products/590415146-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg
store_origin: AR
region: Argentina
---

# 403mg Caffeine for sustained energy 8g L-Citrulline Malate for insane muscle pump 600mg Alpha GPC for tunnel vision focus Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane)

**Brand:** underground bio labs
**Price:** AR$191168
**Availability:** ✅ In Stock

## Summary

> 💥 Skull Pre-Workout: Dominate your day with focus, pump, and relentless energy!

## Quick Answers

- **What is this?** Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane) by underground bio labs
- **How much does it cost?** AR$191168 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/590415146-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

- • **Laser-Sharp Focus:** 600mg Alpha GPC and 3g L-Tyrosine dial in tunnel vision for peak mental clarity
- • **Endurance to Outlast:** 50mg Senactiv boosts stamina so you push harder, longer
- • **Nootropic Powerhouse:** 500mg Lion’s Mane and 100mg CognatiQP enhance cognition and mood for total mind-body synergy
- • **Explosive Muscle Pumps:** 8g L-Citrulline Malate + 1000mg Agmatine Sulfate deliver vascularity that turns heads
- • **Unmatched Energy Surge:** 403mg caffeine from 3 sources powers your grind without the crash

## Overview

Underground Bio Labs’ Skull Pre-Workout is a cutting-edge nootropic formula combining 403mg caffeine, 600mg Alpha GPC, and 8g L-Citrulline Malate to deliver unparalleled energy, tunnel vision focus, and muscle pumps. Enhanced with Lion’s Mane and CognatiQP for cognitive support, plus endurance-boosting Senactiv, this 40-serving powder fuels intense workouts with sustained energy and mental sharpness, making it the go-to choice for professionals who demand peak performance without the crash.

## Description

PANDA SUPPS - SKULL Pre-Workout Behold SKULL, our all new High Stimulant Nootropic Pre-Workout the newest addition to our growing pre-workout lineup! Forged with utmost precision over an arduous span, this pre-workout transcends the boundaries of focus and nootropic pre-workouts, ascending to the realm of the extraordinary. SKULL combines pump, focus, tunnel vision, and endurance all in one pre-workout! A new chapter has been opened in the Panda Supps pre-workout lineup. SKULL Pre is a testament to the unyielding dedication of Panda Supps, forever etched in the hearts of those who seek unparalleled excellence. Skull pre-workout, with its powerful ingredients, promotes muscle endurance, helping you push through those intense training sessions with ease. Not only does it aid in energy production, giving you the sustainable fuel you need to power through your workouts, but most importantly, it supports focus and mental sharpness, allowing you to stay fully engaged and in the zone. Additionally, Skull pre-workout provides mood elevation, helping you feel motivated and ready to tackle your fitness goals. Its tunnel vision effect enables you to block out distractions and maintain unwavering concentration. What sets this pre-workout apart is its ability to reduce the perception of effort. With the added benefit of delivering amazing pumps, Skull pre-workout is undoubtedly destined to become your new favorite pre-workout supplement. Directions: SKULL should be consumed 20 minutes prior to any workout or exercise session. Depending on tolerance, start with 1/2 - 1 scoops and mix vigorously in 8 Oz of water until dissolved fully. Do NOT exceed 2 scoops.

Review: My favorite daily! - One of my favorite go to pre workouts! You don’t feel cracked but the energy keeps you going without a massive crash. I keep trying different pres but keep coming back to this as my daily.
Review: Good choice - Great pre workout not that much an energy boost but it definitely didn’t make me crash after. The taste is great too I’d drink it all day

## 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 | B0CMJBD76R |
| Age Range Description | Adult |
| Best Sellers Rank | #113,051 in Health & Household ( See Top 100 in Health & Household ) #254 in Sports Nutrition Pre-Workout Powders |
| Brand | Underground Bio Labs |
| Brand Name | Underground Bio Labs |
| Customer Reviews | 3.8 out of 5 stars 21 Reviews |
| Dosage Form | Powder |
| Flavor | Insane In The Membrane |
| Item Dimensions | 3.5 x 3.5 x 6 inches |
| Item Form | Powder |
| Item Weight | 1.2 pounds |
| Item dimensions L x W x H | 3.5 x 3.5 x 6 inches |
| Manufacturer | Underground Bio Labs |
| Manufacturer Part Number | SkullPre |
| Model Name | "SkullPre |
| Number of Items | 1 |
| Product Benefits | Energy Management |
| Total Servings Per Container | 40 |
| UPC | 051497423179 |
| Unit Count | 14.81 Ounce |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Underground Bio Labs
- **Flavor:** Insane In The Membrane
- **Item Form:** Powder
- **Item Weight:** 1.2 pounds
- **Item dimensions L x W x H:** 3.5 x 3.5 x 6 inches
- **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 for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane) - Image 1](https://m.media-amazon.com/images/I/81ZoFLKluyL.jpg)
![Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane) - Image 2](https://m.media-amazon.com/images/I/61SPAE92VlL.jpg)
![Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane) - Image 3](https://m.media-amazon.com/images/I/81kcwUqr3fL.jpg)
![Underground Bio Labs/Panda Supps Skull Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane) - Image 4](https://m.media-amazon.com/images/I/81pvTeWstbL.jpg)

## Available Options

This product comes in different **Flavor** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ My favorite daily!
*by I***C on July 1, 2025*

One of my favorite go to pre workouts! You don’t feel cracked but the energy keeps you going without a massive crash. I keep trying different pres but keep coming back to this as my daily.

### ⭐⭐⭐⭐⭐ Good choice
*by A***Y on March 21, 2025*

Great pre workout not that much an energy boost but it definitely didn’t make me crash after. The taste is great too I’d drink it all day

### ⭐ Not good
*by J***L on February 25, 2025*

Probably the worst tasting pre I've had so far. Doesn't work well for a pre workout either. Felt very little from it.

## Frequently Bought Together

- Underground Bio Labs/Panda Supps Skull:Nootropic Pre-Workout, 403mg Caffeine for Tunnel Vision Focus,Pump, Unparalled Energy (40 Scoops) (Lemon Blueberry Pineapple)(Insane in The Membrane)
- 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)
- 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)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-09-06*