Why Feyv?


Because what you take every day should be effective, safe, and built for the long run.

The supplement aisle is crowded with creatine products, especially gummies. But many prioritize convenience over evidence, using under-dosed formulas or ingredients with unclear sourcing.

Feyv was created to raise that standard.

Clinically Supported. Not Overdone.

Creatine is one of the most researched supplements in the world, but dose matters.

Each serving of Feyv provides 3 grams of creatine monohydrate, the daily intake used in internationally recognized health claims and supported by decades of research. This dose has been shown to improve physical performance during high-intensity exercise and enhance strength gains when combined with resistance training.

We chose this amount deliberately: effective, sustainable, and appropriate for daily, long-term use.

Designed for Longevity: Muscle, Bone, Brain

Feyv isn’t just about short-term performance. It’s about staying capable as you age.

Beginning in adulthood, gradual muscle loss becomes part of normal aging and can contribute to reduced strength, mobility, and independence over time.

That’s why Feyv combines creatine with vitamin D3 (18.75 mcg / 750 IU):

  • Muscle: Creatine supports strength, power, and physical resilience

  • Bone: Vitamin D3 supports bone health and calcium metabolism

  • Brain: Creatine has been shown to support cognitive performance, particularly under stress

Together, they create a simple daily foundation for aging with strength and clarity.

German-Manufactured Purity You Can Trust

Not all creatine is the same.

Feyv uses Creavitalis® creatine monohydrate, a highly purified form of creatine manufactured in Germany by the same company behind Creapure®. It is produced under strict European quality standards and tested for contaminants, including heavy metals.

That means:

  • ≥99.9% creatine monohydrate

  • Verified limits on lead, cadmium, mercury, and arsenic

  • No unnecessary additives or fillers

We believe transparency matters, especially for something you take every day.

Designed by Doctors, Not Marketers

Feyv was created by physicians who saw a gap in the supplement world:
Adults focused on long-term health didn’t have a product they could trust to deliver clinically supported dosing, clean sourcing, and everyday convenience in one place.

So we built it ourselves.

Every jar reflects our belief that supplements should support your health today, and still make sense decades from now.

Strength for the Long Run

Feyv isn’t about hype or shortcuts.
It’s about supporting muscle, bone, and brain health so you can stay active, independent, and capable for years to come.



References

  1. Clean Label Project. Protein Powder Contaminant Testing. https://cleanlabelproject.org/protein-powder/

  2. Patrick L. Lead toxicity, a review of the literature. Part 1: exposure, evaluation, and treatment. Altern Med Rev. 2006;11(1):2-22.

  3. Järup L, Åkesson A. Current status of cadmium as an environmental health problem. Toxicol Appl Pharmacol. 2009;238(3):201-208.

  4. Cruz-Jentoft AJ, et al. Sarcopenia: revised European consensus on definition and diagnosis. Age Ageing. 2019;48(1):16-31.

  5. Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18.

  6. Holick MF. Vitamin D deficiency. N Engl J Med. 2007;357:266–281.