Sustained release technology allows the B-vitamins and vitamin C to be released slowly over an extended period rather than all at once. This provides consistent nutrient levels throughout the day, reduces the chance of stomach upset, and ensures your body has a steady supply of stress-supporting nutrients when you need them most.

During times of stress—whether physical (exercise, illness) or emotional (work pressure, life changes)—your body rapidly depletes B-vitamins and vitamin C. These nutrients are essential for producing stress hormones, supporting adrenal function, and maintaining nervous system health. Supplementation helps replenish what's lost and supports your body's ability to handle stress effectively.

The calming herbs (Valerian, Hops, Skullcap) are included in supportive amounts to help manage stress-related tension without causing significant drowsiness. However, individual responses vary. If you experience drowsiness, consider taking in the evening or reducing your dose. The primary focus is stress support, not sedation.

Super Stress Complex can be taken both ways! Use it daily during high-stress periods (work deadlines, major life changes, intense training) to replenish depleted nutrients, or take it long-term as part of your wellness routine to maintain optimal B-vitamin and vitamin C levels for ongoing stress resilience and overall health.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

*These statements have not been evaluated by The Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

What FZKL is known for


What Our Customers Say

"I feel like my skin looks more radiant and my joints feel more flexible since starting this collagen. Love that it's pure and unflavored — mixes perfectly into my morning coffee with no taste or texture."

-Janifer smith

"I feel more energized and less sluggish since adding this to my morning routine. Love that it's packed with organic greens and superfoods — no artificial anything, just pure plant-based nutrition."

Jason Smith

"I feel more energized throughout the day and less run down after workouts since starting this multivitamin. I love knowing it’s organic and clean — no junk fillers, just real nutrition."

- Mark S.

"I feel more energized throughout the day and my hair and nails look healthier since starting this multivitamin. Love knowing it's organic and from real food sources — no synthetic fillers, just clean nutrition tailored for women."

— Jessica M.

"I feel calmer and my digestion has improved since starting this probiotic. Love that it's clean, science-backed, and actually works for both gut and mood."

— Sarah M.

"I feel stronger in the gym and recover faster since adding this creatine to my routine. Love that it's pure, unflavored, and mixes easily — no fillers, just clean performance support."

— Jason R.

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Everything You Need to Know!

Frequently Asked Questions

FZKLfit provides science-backed sports nutrition supplements for performance, recovery, sleep support, and overall wellness.

Yes — all supplements are formulated with clean, clinically supported ingredients and made without harmful fillers or artificial additives.

Lay your performance-wellness foundation first with our Coenzymated Advanced Men’s or Women’s Multi, one of our Probiotics (We have quite a few. If not sure, start with our Advanced Synbiotic) and our Ultra Omega 3 Mini. You can build upon that with our Super Collagen and Ultra Greens which are amazing too!

Our muscle recovery products are designed to reduce inflammation, boost repair, and improve post-workout performance.

Yes — FZKLfit offers worldwide shipping, with costs and delivery times varying by location.

We offer a satisfaction guarantee — if you’re not happy with your order, you can return or exchange it within the specified timeframe