---
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: "381.71 DT"
currency: TND
in_stock: true
reviews_count: 8
url: https://www.desertcart.tn/products/590415146-underground-bio-labs-panda-supps-skull-nootropic-pre-workout-403mg
store_origin: TN
region: Tunisia
---

# 403mg caffeine for explosive energy 8g L-Citrulline Malate for insane muscle pumps 600mg Alpha GPC for razor-sharp tunnel vision 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:** 381.71 DT
**Availability:** ✅ In Stock

## Summary

> 💥 Skull Pre-Workout: Dominate your workout, own your focus, and never settle for less!

## 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?** 381.71 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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

- • **Epic Muscle Pumps:** 8g L-Citrulline Malate + 1000mg Agmatine Sulfate deliver vascularity that turns heads
- • **Nootropic Powerhouse:** 500mg Lion’s Mane and 100mg CognatiQ elevate cognition and mood for peak performance
- • **Endurance That Outlasts:** 50mg Senactiv boosts stamina so you push harder, longer
- • **Unstoppable Energy Surge:** 403mg caffeine from 3 sources powers your grind without the crash
- • **Laser-Focused Mental Clarity:** 600mg Alpha GPC and 3g L-Tyrosine lock your mind in tunnel vision mode

## Overview

Underground Bio Labs’ Skull Nootropic Pre-Workout combines 403mg of multi-source caffeine with potent nootropics like 600mg Alpha GPC and 500mg Lion’s Mane to deliver unparalleled energy, tunnel vision focus, and muscle pumps. Designed for professionals who demand mental sharpness and physical endurance, this 40-serving powder fuels intense workouts with sustained energy, enhanced cognition, and mood elevation—all without the dreaded 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: Skull...... - I don't like to review supps... Not everything works for everybody. I mean I have a high tolerance for stims 🤷🏾‍♂️ anyway.... THIS RIGHT HERE!!!!!! Taste great, dragonfruit is sweet not sour 👏🏾 here's the protocol PB & Rice cake first with Skull Wait for 30mins.... Tunnel vision, great energy, good pump. No crash!!!
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.

## 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 |
| ASIN  | B0CMJBD76R |
| Age Range Description | Adult |
| Best Sellers Rank | #112,902 in Health & Household ( See Top 100 in Health & Household ) #262 in Sports Nutrition Pre-Workout Powders |
| Brand Name | Underground Bio Labs |
| Customer Reviews | 4.1 4.1 out of 5 stars (52) |
| Date First Available  | November 4, 2023 |
| Dosage Form | Powder |
| Flavor | Insane In The Membrane |
| Item Dimensions | 3.5 x 3.5 x 6 inches |
| Item Form | Powder |
| Item Weight | 1.15 Pounds |
| Manufacturer | Underground Bio Labs |
| Manufacturer  | Underground Bio Labs |
| Number of Items | 1 |
| Product Benefits | Energy Management |
| Product Dimensions  | 3.5 x 3.5 x 6 inches; 1.15 Pounds |
| 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:** 1.15 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)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Skull......
*by A***N on August 18, 2025*

I don't like to review supps... Not everything works for everybody. I mean I have a high tolerance for stims 🤷🏾‍♂️ anyway.... THIS RIGHT HERE!!!!!! Taste great, dragonfruit is sweet not sour 👏🏾 here's the protocol PB & Rice cake first with Skull Wait for 30mins.... Tunnel vision, great energy, good pump. No crash!!!

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐ Stopped using.
*by S***2 on October 9, 2025*

When I first tried this stuff, the focus was so intense, and it wasn't like most pre-work outs that hit right away, this stuff came on nice and gently, also you need to have the mind set of not waiting for a sudden surge of motivation to go exercise. It's down the hatch and get to it, once your in the start of your routine is when you'll notice it, the intensity, focus and energy that followed was incredible, however the last two I got ended up with the same sentation heavy in my gut and killing any motivation what so ever, turning my workouts into a complete struggle, not sure if the formula got tweaked or what, so I moved on, giving it three stars to be fair, people change, building up a tolerances, or change in diets. I'm not saying I'll never get it again but for the price and the amount of servings you get, it didn't make it viable for something that stopped having a positive effect on me.

## 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-05-30*