NuBest Doctor Plus
What This Product Is Actually For
Like NuBest's other 10+ formulas, Doctor Plus is a nutritional-gap filler built around calcium and vitamin D3 for bone mineralization. What sets it apart is a longer ingredient list: collagen hydrolysate (the protein bones are partly built from), vitamin K2 as MK-7 (which helps direct calcium into bone rather than soft tissue), and Eucommia bark extract, a traditional Chinese herb historically used for bone and joint support.
NuBest's own disclaimer is unusually specific here, and worth reading in full: the product page states it is not effective for growth-related conditions such as dwarfism, Turner syndrome, inflammatory bowel disease, or celiac disease — and recommends seeing a doctor if there's no change in height after 6 months. That's a meaningful, honest boundary: this is a nutrition-gap supplement, not a treatment for an underlying medical cause of short stature.
What's Actually Inside
| Ingredient | Form | Role |
|---|---|---|
| Calcium | Tricalcium Phosphate | Primary structural mineral for bone mass |
| Vitamin D3 | Cholecalciferol | Enables calcium and phosphorus absorption |
| Vitamin K2 | Menaquinone-7 (MK-7) | Helps activate osteocalcin, the protein that binds calcium into bone |
| Magnesium | Magnesium Amino Acid Chelate + Magnesium Gluconate | Supports bone matrix formation and muscle function |
| Phosphorus | Tricalcium Phosphate | Works alongside calcium in bone mineral structure |
| Collagen Hydrolysate | Bovine-derived | Supplies the protein framework bone mineral is built onto |
| Eucommia Bark Extract | Botanical extract | Traditional bone/joint support herb; see evidence note below |
| DHA | Algae-derived powder | Vegan omega-3 for brain and eye development |
| GABA | Gamma-Aminobutyric Acid | Included for relaxation support; see evidence note below |
| Other ingredients | Capsule shell, Cassia Bark Extract | Capsule structure and minor flavor addition |
A real labeling contradiction worth knowing about: NuBest's own ingredient panel lists the capsule shell simply as "Vegetarian Capsule." But the site's own FAQ says the opposite: "No, it is not [vegetarian] since the capsules contain collagen and are made from gelatin." Gelatin capsules are typically animal-derived (often bovine or porcine). If a vegetarian or vegan diet matters for your family, don't rely on the ingredient list label here — contact NuBest directly to confirm the current capsule material, since this is a genuine inconsistency on their own product page.
How Strong Is the Evidence, Ingredient by Ingredient?
This is the section most product pages skip. Doctor Plus combines nutrients with very different levels of scientific support — some backed by decades of research in exactly this context, others borrowed from adult or animal research that hasn't been tested in growing kids. Here's an honest breakdown.
What this means in practice: the calcium, vitamin D3, and vitamin K2 in this formula rest on genuinely solid ground for supporting bone mineralization. Collagen and Eucommia bark are reasonable, low-risk additions, but the "extra bone support" claims tied to them lean more on adult, animal, or preclinical research than on pediatric evidence — worth knowing rather than assuming they're equally proven.
How to Use It
Ages 10+
Take 1 capsule twice daily, during or after meals.
Can't swallow capsules?
NuBest suggests opening the capsule and mixing the contents into liquid food or a drink.
Give it 6 months
NuBest's own guidance says to reassess with a doctor if there's no noticeable change after 6 months of consistent use.
Who Should Check With a Doctor First
Frequently Asked Questions
How is this different from NuBest Grow Power?
Doctor Plus adds collagen hydrolysate, vitamin K2, and Eucommia bark extract on top of the same calcium/D3/magnesium/phosphorus base — a more elaborate formula, at a higher price, with a mix of well-established and less-proven additions.
Is it actually vegetarian?
NuBest's ingredient list says "Vegetarian Capsule," but their own FAQ says the capsules are gelatin-based and not vegetarian. This is a direct contradiction on their page — check with NuBest directly if this matters for your family.
Can I combine it with a regular multivitamin?
NuBest specifically advises against pairing it with other supplements containing vitamin D3, K2, or calcium, since Doctor Plus is designed to already cover daily needs for those nutrients on its own.
Will the collagen or Eucommia bark actually help my child grow?
The evidence for collagen's bone benefits comes from postmenopausal women, and Eucommia bark's evidence comes from animal studies — neither has been tested specifically in growing children, so it's reasonable to view these as lower-confidence additions layered onto the well-established calcium/D3/K2 base.
