Supplement profile
Vitamin D3 + K2
The foundational hormone stack — critical for testosterone production, immune function, bone density, and GH receptor sensitivity.
Evidence Level
Dosage
Timing
Form
How it works
Vitamin D3 functions as a steroid hormone, binding nuclear receptors in virtually every cell type. Deficiency (extremely common in Australians despite high sun exposure due to indoor lifestyles and sunscreen use) directly impairs testosterone synthesis and GH signalling. K2 ensures calcium from D3 supplementation is directed to bone rather than arteries.
What to look for
Ensure D3 (cholecalciferol) not D2. K2 must be MK-7 form (menaquinone-7) not MK-4 — MK-7 has a much longer half-life. Test your 25(OH)D blood level before starting — many Australians are deficient even in summer.
Our recommendation
Buying Vitamin D3 + K2
No brand partner yet. Here's our independent guidance on what makes a quality product.
Look for third-party tested products with verified purity, correct form and dosage. Avoid proprietary blends and underdosed formulations.
When ProtocolHub establishes a verified partner for this supplement, a specific product recommendation will appear here. Our editorial recommendations are never influenced by commercial relationships.
Are you a supplier? Contact us to get listedPairs with these peptides
Vitamin D3 + K2 directly amplifies the effects of these peptide protocols.
Ipamorelin + CJC-1295
The gold standard GH-releasing combination for anti-ageing, body recomposition, and sleep quality.
Sermorelin
A gentler GH stimulator — the entry-level anti-ageing peptide for those new to growth hormone therapy.
Thymosin Alpha-1
The thymus-derived immune modulator — approved in 35+ countries for hepatitis, cancer support, and immune deficiency restoration.
Protocols using Vitamin D3 + K2
These clinician-reviewed protocol stacks include Vitamin D3 + K2 as part of their supplement plan.
Recovery & Repair Stack
The most effective peptide combination for injury recovery, tendon healing, and gut repair.
BPC-157 accelerated tendon-to-bone healing by 2x in published preclinical trials. TB-500 promotes systemic tissue repair.
Longevity & Anti-Ageing Stack
The core protocol for GH optimisation, cellular repair, and healthy ageing.
GHK-Cu increased collagen by 70% in skin studies. Ipamorelin restores youthful GH pulsatility without cortisol elevation.
Hormone Optimisation Stack
GH secretagogues for body recomposition, sleep quality, and hormonal balance.
Ipamorelin + CJC-1295 increased IGF-1 levels by 65% in clinical studies with no impact on cortisol or prolactin.
Beginner Muscle Building Stack
The safest entry point for peptide-assisted muscle growth — GH optimisation without the complexity of IGF-1.
MK-677 increased lean mass by 2.7 kg over 8 weeks in GH-deficient adults without exercise intervention.
See your complete supplement stack
Get Vitamin D3 + K2 plus every supplement matched to your specific protocol goal — with peptides, training, and nutrition all included.
Build my protocolRelated supplements
Creatine Monohydrate
The most evidence-backed performance supplement in existence — increases strength, power, and muscle recovery.
Whey Protein
The most bioavailable protein source — essential for hitting protein targets that support muscle growth and recovery.
Magnesium Glycinate
The most bioavailable form of magnesium — essential for sleep quality, muscle recovery, and hormone production.
Omega-3 (EPA/DHA)
Anti-inflammatory foundation — reduces exercise-induced inflammation, supports cardiovascular health, and enhances GH receptor sensitivity.
Medical disclaimer
The information on this page is for educational purposes only and does not constitute medical advice. All peptide and supplement therapies should be discussed with an AHPRA-registered medical practitioner before use. ProtocolHub does not prescribe, dispense, or supply any therapeutic goods. Always consult a qualified healthcare professional before starting any new health protocol.