Built for the Body that Doesn't Stop
A daily botanical formula that supports cellular energy, clear focus, and recovery*
How Flex Works
Your Cells Work as a System
Energy production, stress response, and repair are connected. Supporting cellular vitality means looking at them together.
10 Ingredients. Multiple Pathways.
Flex combines targeted nutrients and botanicals selected to support complementary cellular processes, not just one.
Daily Support, Without Stimulants
Taken consistently, Flex supports steady energy, clear focus, and recovery, without relying on a temporary spike.
Explore the formula
Hover or tap a pathway to see featured ingredients.
Ingredient groupings reflect primary pathways and ingredient-level research. See the Science page for citations and dosage context.
Flex
$69.99
Energy — Supports normal cellular energy production without stimulants.
Focus — Supports clear focus and calm alertness.
Recovery — Supports cellular resilience and recovery from everyday stress and exertion.
- ✓ Third-party tested
- ✓ Stimulant-free
- ✓ 10 targeted ingredients
- ✓ Made in an NSF-Certified GMP facility
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Suggested Use
Take 2 capsules daily with water, preferably with a meal. For best results, take Flex consistently as part of your daily routine.
90-Day Money-Back Guarantee
Give Flex time to become part of your routine. If it isn’t right for you, email us at hello@guvahealth.com within 90 days of delivery for a refund on your first order.
Third-Party Testing
Flex is independently tested to verify that it meets established identity and quality specifications.
Supplement Facts
The Root Cause
You didn't get lazy.
NAD⁺ is the coenzyme your cells use to turn food into usable energy. Human tissue studies show it falls steadily from early adulthood onward, and the steepest part of that slide lands in the years most people first notice slower recovery and afternoon fog.
41%
of U.S. adults have insufficient vitamin D, a nutrient your body needs for normal muscle and immune function. It's one of the few things on this page you can confirm with a blood test.
NHANES 2001–2018, n=71,685. Frontiers in Nutrition, 2022
300 mg
of nicotinamide riboside per serving, the precursor your body converts into NAD⁺. Plus 50 mcg of vitamin D3, at the dose we'd want to see on a label rather than a trace amount.
See the full supplement facts panel above.
THE THINKING BEHIND FLEX
Why support only one pathway?
Read the Science →“Energy, focus, and recovery aren’t separate systems. They depend on interconnected cellular processes, so I formulated Flex to support them together.”
Flex is built for you if:
- You track your recovery and notice when it slips
- You’ve tried generic supplements and felt little to nothing
- You want to get ahead of cellular decline before it compounds
- You care about the mechanism, not just the marketing
- You want a formula with published research behind each ingredient
Common Questions
How long until I notice a difference?
We recommend giving it between 30 and 90 days. Cellular repair is cumulative. It doesn't produce an acute effect like caffeine does. Your body is rebuilding at the cellular level, and that process takes time to express itself in energy, recovery, and focus. If you track biometrics like HRV, sleep quality, or recovery scores, those tend to shift first.
What makes Flex different from other supplements?
Flex combines 10 targeted nutrients and botanicals selected to support complementary pathways involved in cellular energy, focus and recovery. It was formulated by molecular biologist Dr. Bryant Villeponteau.
Does Flex contain caffeine or stimulants?
No. Flex is formulated without caffeine or conventional stimulants. It is intended to support steady energy and calm focus without relying on a temporary stimulant effect.
Can I take Flex with medications or other supplements?
Flex contains natural herbs and vitamins. No stimulants, no synthetic compounds. Most people stack it alongside standard supplements without issue. If you take prescription medication, have a medical condition, or are pregnant or nursing, check with your doctor first.
How do I take Flex?
Take 2 capsules daily with water, preferably with a meal. Consistent daily use is recommended. Do not exceed the suggested use.