5-HTP crosses the blood-brain barrier and converts to serotonin, a neurotransmitter that regulates mood, sleep, and emotional well-being. Our formula uses 98% standardized Griffonia bean extract for superior absorption and effectiveness compared to L-tryptophan.

St. John's Wort can interact with many medications including antidepressants, birth control, blood thinners, and others. Always consult your healthcare provider before taking this supplement, especially if you're on prescription medications or have existing health conditions.

Most people begin noticing mood improvements within 2-4 weeks of consistent daily use. For optimal neurotransmitter balance and sustained emotional well-being, we recommend taking Mood Support for at least 8-12 weeks.

Our comprehensive formula combines multiple synergistic ingredients: St. John's Wort for mood support, 5-HTP for serotonin production, L-tyrosine for neurotransmitter synthesis, Siberian Eleutherococcus for stress adaptation, and Inositol for brain messaging. This multi-targeted approach addresses mood from several pathways for more complete support.

*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.

LEARN MORE ABOUT OUR PRODUCTS

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