About Us
At Optimal Function we create clean, science backed supplements designed to support your body's natural performance every day. Our mission is to make high quality nutrition accessible, transparent and genuinely effective without unnecessary fillers or gimmicks.
Scientifically Crafted by Experts
Only the Finest Ingredients for Superior Results.
Vitamin D3 + K2 MK-7 | High Strength 4000 IU
Why Choose Us
Why Our Clients Love Our Supplements
Enhanced Absorption
Our supplements are formulated for efficient use within the body. Each ingredient is selected for bioavailability so you get meaningful support from every dose.
Science-Backed Formulas
Every ingredient is chosen based on clinical research and human physiology. We make products that support real health with effective, well balanced formulations.
Clean & Natural Ingredients
We use high quality, non GMO ingredients with clear labelling and careful sourcing. No unnecessary fillers and no artificial colours or preservatives.
Quality You Can Trust
Optimal Function is built on transparency, integrity and product quality. We manufacture in GMP certified UK facilities and focus on honest formulas you can feel confident taking every day.
Vitamin D3 + K2 MK-7 | High Strength 4000 IU
High-strength Vitamin D3 + K2 designed for immunity, muscle function and bone health. Clean UK-made formula delivering 4000 IU D3 and bioactive MK-7 K2 in one smooth daily tablet.
FAQ's
What makes Optimal Function different from other supplement brands?
We prioritise science backed ingredients, clean formulas and effective dosages. Our focus is on real results and long term wellbeing rather than marketing trends or underdosed blends.
Are your supplements made in the UK?
Yes. All Optimal Function products are manufactured in the United Kingdom. This allows us to maintain consistent quality and full traceability from production to your doorstep.
Why did you start Optimal Function?
We created Optimal Function to make supplements people can trust. Our goal is to support everyday performance, energy and health with products that are enjoyable to take, transparent in formulation and designed with purpose.
What quality standards do you follow?
Our products are produced in state of the art UK facilities that operate to strict GMP manufacturing standards. Each batch is made with premium grade ingredients and undergoes quality checks to ensure purity and safety.
Why should I choose Optimal Function over cheaper alternatives?
We believe transparency matters. In the supplement market it is common to see products with unclear ingredient quality, incomplete label information or dosages that do not match what customers expect. We take the opposite approach. We use premium ingredients, honest labelling and formulations you can rely on. When you choose Optimal Function you know exactly what you are putting into your body.
