Start with hydration
Hydrate supplies sodium, potassium, magnesium, and calcium alongside taurine and coconut water powder. Make hydration a habit before reaching for more caffeine.
THE COMPLETE STACK4 full-size products
Made for your routine
Adult dads balancing work, family, and training. Built for men who want a simple routine they can repeat, with a caffeinated pre-workout reserved for selected sessions.
Explore every product
BUILT AROUND YOUR GOALS
Give every part of the day a clear role.
Bring your attention to training
Berserker Focus is the caffeinated, focus-first formula for selected workouts. A purposeful pre-workout choice for the time you have set aside to train.
Build beyond the workout
Magnesium+ gives magnesium glycinate and L-theanine a place in your evening routine. Omega D3/K2 adds its omega ingredient blend, vitamin D3, and K2 to your daily nutritional plan.
EVERY PRODUCT HAS A JOB
Here’s what arrives.
One full-size container of every product below. Explore the individual pages for complete formulas, labels, and directions.
01CAFFEINATED FOCUS FORMULA
Berserker Focus
20 full-scoop workoutsA focus-first pre-workout for the sessions that demand your attention as much as your effort.
- 1 full-size tub
- Standalone price: $39.99
- Supply at the stated serving
- 20 full scoops or 40 half scoops
How and when to use it
Experienced users: 1 scoop in 10–12 oz of water before training. New users: start with ½ scoop as directed on the label. Avoid close to bedtime and do not combine with other caffeine or stimulants.
02ELECTROLYTE REPLACEMENT
Hydrate
1,000mg sodium per scoopPink Himalayan salt, magnesium glycinate, taurine, and coconut water powder for a deliberate hydration routine.
- 1 full-size tub
- Standalone price: $49.99
- Supply at the stated serving
- 30 days at 2 scoops daily
How and when to use it
Hollow suggests 1 scoop first thing in the morning before coffee, pre-workout, or a meal, and 1 scoop during training. Mix each scoop into 24 oz of water. Match intake to your activity and sodium needs.
03EVENING ROUTINE SUPPORT
Magnesium+
200mg elemental magnesiumMagnesium glycinate with 200mg L-theanine per serving, plus the other nutrients listed on the full label.
- 1 full-size bottle
- Standalone price: $25.99
- Supply at the stated serving
- 30 days at 4 capsules daily
How and when to use it
Take 4 capsules daily with water, following the label. Evening is a convenient time to build the habit. Account for magnesium in your other supplements.
04OMEGA BLEND + D3 + K2
Omega D3/K2
180mcg K2 as MK-7An omega ingredient blend, vitamin D3, and MK-7 vitamin K2 in one four-capsule serving.
- 1 full-size bottle
- Standalone price: $24.99
- Supply at the stated serving
- 30 labeled servings
How and when to use it
The label serving is 4 capsules daily with water. It provides 5,000 IU vitamin D3, a high dose that needs healthcare-professional guidance. Review your total vitamin D and K before combining formulas.
MAKE YOUR CHOICE COUNT
Full-size formulas. One clear plan.
This stack brings training focus and everyday support together. You get the same full-size products sold individually, your choice of available flavors, and 10% built-in savings.
FROM PEOPLE WHO USE THE PRODUCTS
The products. Their experience.
Selected excerpts from customer reviews of products included in this stack. These are product reviews, not reviews of the complete bundle.
Review of Berserker Focus
Read the full product reviews10/10 for workouts and for study/deep work.
Review of Hydrate
Read the full product reviewsThe salted tangerine flavor is unbelievable. Definitely recommend this flavor and this product.
Selected customer reviews. Individual experiences and results vary.
When to use it
Make it part of your day.
FIRST THING
Hydrate before the day takes over
Use 1 scoop of Hydrate first thing in the morning, before coffee, pre-workout, or a meal. Follow the Omega D3/K2 label and account for vitamin D from other supplements.
TRAINING
Focus on the session
Use Berserker Focus before selected workouts, following its label. Do not combine it with coffee or other stimulants. Take your second Hydrate scoop during training.
EVENING
Give recovery room
Keep Magnesium+ at a consistent daily time; evening is convenient. Follow the labeled serving and review the magnesium across your routine. Protect your bedtime and keep caffeinated pre-workout well away from it.
These steps organize the products by role. Follow each label and your individual guidance; buying a bundle is not an instruction to take all products together.
FOUNDER LED. PERSONALLY ACCOUNTABLE.
Built by someone who knows both sides.
Before building Hollow Labs, Allen Collins owned supplement stores. The questions customers asked then still shape the brand: what’s in it, how much do I take, and why is it worth buying?
We put the formulas where you can inspect them, explain where each product fits, and stay reachable when you need an answer.
What Hollow stands forHOLLOW LABSSEEK ADVERSITY.Ask the Hollow team
What exactly will I receive?
You receive one full-size retail container of every product shown in “What’s included.” Choose from the flavor options available above before adding the stack to your cart.
Will the whole stack last the same amount of time?
Not necessarily. Containers have different serving counts, and daily products can run out sooner than products used only for selected workouts. Each product card shows its supply at the stated serving.
Can I choose my flavors or swap products?
Choose the available flavor options in the selectors above. The products in each stack are fixed; open an individual product page if you prefer to build a different order.
Is this a replacement for sleep?
No. This stack supports a planned routine, not pushing through chronic sleep loss. Berserker Focus contains caffeine and belongs before selected workouts, not as an all-day substitute for rest.
Does every product contain caffeine?
No. Berserker Focus is the caffeinated product. Hydrate, Magnesium+, and Omega D3/K2 do not list added caffeine. Read the complete labels and use the products at the times that suit their roles.
What makes this different from the other stacks?
This bundle centers on hydration, training focus, and daily support. For creatine, essential aminos, and a broader training routine, explore Hybrid Athlete Stack. For a capsule-only foundation, explore Health Stack.
How do shipping and returns work?
Free shipping applies to orders of $75+ after discounts, with eligibility confirmed at checkout. See our return policy for the 30-day return process and terms.
MATCH THE ROUTINE TO YOUR GOAL
Choose the stack that fits.
Training across disciplines?
Hybrid Athlete Stack
Five formulas for strength, endurance, and the routine around training.
WORK. FAMILY. TRAINING.
Make your routine work for your life.
Choose your stack optionsFull-size products. Current bundle price. One order.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
