Vitamin D Synergy™

Why we vetted this for natural testosterone

• Combines maintenance-level vitamin D3 with both vitamin K1 and K2 (MK-4) plus geranylgeraniol (GG) for nutrient synergy
• Transparent formula with minimal additives and free from GMOs, gluten, dairy, and soy
• Practitioner-trusted brand with science-first backing and clean-ingredient alignment

What we look for on this product

• Synergistic pairing (D + K) supported by evidence, with added GG for conversion and balance
• Exact dosages listed, no hidden blends, accessible third-party listings
• Reputable vendor focused on hormone-conscious, clean-supplement design

Straight talk

• This adds a clean, science-grounded layer of nutrient synergy to your routine.

Transparency & Disclaimers

We independently select and vet products; if you buy via our link, we may earn a small commission at no extra cost to you. Ingredients, labels, and formulations can change—always check the packaging before use. This information is for educational purposes and isn’t medical advice; consult a qualified professional for personal guidance. If you have sensitive skin, patch-test first and discontinue if irritation occurs. Prices and availability may change without notice.

Last checked: September 3, 2025