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01Scientific approach
We start with the nutrient forms that human research has actually tested, then set a purposeful daily amount you can read line by line on the label. Where a formula uses a blend, we say so, and we keep evidence about an ingredient separate from claims about a product.
02Bioavailability & nutrient synergy
A milligram on a label only counts if your body can absorb it and use it. These three principles shape our formulas, and each one comes with a real example from the range.
2.1 · Form
D3 over D2
Cholecalciferol · 125 mcg
Both forms of vitamin D raise blood levels, but most studies find D3 raises them further and keeps them up longer. Creatine works the same way: monohydrate is the form behind most of the research, so it's the form both of our creatine powders use.
2.2 · Pairing
D3 + K2
Absorb calcium · then direct it
Vitamin D helps you absorb calcium from food. Vitamin K2 activates proteins, like osteocalcin, that bind that calcium into bone. The same idea is behind turmeric with BioPerine: piperine slows how fast the body breaks curcumin down.
2.3 · Count
20B CFU
13 strains · at manufacture
Probiotic effects belong to specific strains at specific counts, so the number matters. Our label states 20 billion live cultures per capsule, counted at the time of manufacture. Live counts naturally fall over shelf life, so store it as the label directs.
03Active ingredient & formula index
Each dose below is copied from the product's Supplement Facts panel. The ratings summarize published research on the ingredient, not on our product.
Strongconsistent human trials Moderatereal but modest or mixed Emergingearly or limited
Vitamin D3 as cholecalciferol · vitamin K as K2
Dose per serving
125 mcg / 200 mcg
5,000 IU D3 · 1 capsule · 30 servings
One clear job
Absorb calcium, then put it to use
Key research context
D3 · StrongK2 · Emerging
Supplemental D3 reliably raises blood vitamin D levels. K2 activates calcium-handling proteins, but trials on bone and heart outcomes are mixed. 5,000 IU is above the 4,000 IU adult upper limit, so test your levels with a clinician first. Vitamin K interacts with warfarin.
NIH ODS, Vitamin D (opens in a new tab) NIH ODS, Vitamin K (opens in a new tab)
View Formula & Supplement Facts for Vitamin D3 + K2Creatine monohydrate · single ingredient · unflavored
Dose per serving
5.6 g
Creatine monohydrate · 1 scoop · 50 servings
One clear job
Refill phosphocreatine for short, hard efforts
Key research context
Strong
The International Society of Sports Nutrition's position stand calls creatine monohydrate the most effective supplement for high-intensity training capacity and lean mass, at 3–5 g a day, noting that larger athletes may need more. One 5.6 g scoop sits just above that range, and muscle stores fill in about four weeks without a loading phase.
Kreider et al., J Int Soc Sports Nutr, 2017 (opens in a new tab)
View Formula & Supplement Facts for Creatine Monohydrate PowderCreatine monohydrate · sodium (sea salt) · potassium (chloride) · magnesium (malate)
Dose per serving
5,000 mg
+ 1,000 mg sodium, 200 mg potassium, 60 mg magnesium · 1 scoop · 22 kcal
One clear job
Creatine, plus the electrolytes lost in sweat
Key research context
Creatine · Strong
5,000 mg of creatine (as monohydrate), within the 3–5 g daily range studied in the ISSN review. The 1,000 mg of sodium (43% DV) is meant for heavy sweaters, so count it toward your daily total if you watch your sodium intake.
Kreider et al., J Int Soc Sports Nutr, 2017 (opens in a new tab)
View Formula & Supplement Facts for Creatine + ElectrolytesWhey protein isolate · contains milk
Dose per serving
22 g
Protein · 2 scoops (36.5 g) · 120 kcal · 24 servings
One clear job
Top up daily protein for muscle repair
Key research context
Strong
The ISSN recommends 1.4–2.0 g of protein per kg of body weight a day for most people who exercise, in servings of about 20–40 g. Whey is a complete, leucine-rich milk protein. Each serving also adds 4 mcg of vitamin D.
Jäger et al., J Int Soc Sports Nutr, 2017 (opens in a new tab)
View Formula & Supplement Facts for Whey Protein – Chocolate13-strain probiotic blend, including L. acidophilus, L. rhamnosus, L. plantarum, B. lactis and B. bifidum
Dose per serving
20B CFU
317 mg blend · 1 capsule · counted at manufacture
One clear job
Add live cultures to the gut
Key research context
Moderate · strain-specific
Benefits seen in trials belong to particular strains at particular doses. Our label lists species and a total count, not strain codes or amounts per strain, so results from individual strain trials can't be applied to it directly.
NCCIH, Probiotics (opens in a new tab)
View Formula & Supplement Facts for 20 Billion ProbioticTurmeric root powder · turmeric extract (std. to 95% curcuminoids) · BioPerine black pepper extract (std. to 95%)
Dose per serving
645 mg
Turmeric (635 mg powder + 10 mg extract) + 10 mg BioPerine · 2 capsules
One clear job
Turmeric, paired with piperine for absorption
Key research context
Moderate
In a 1998 human study, 20 mg of piperine taken with 2 g of curcumin raised curcumin's bioavailability by about 2,000%. Our serving contains far less curcumin than that, so the pairing principle applies, but the size of the effect may not. NCCIH notes rare reports of liver injury linked to turmeric products.
Shoba et al., Planta Med, 1998 (opens in a new tab) NCCIH, Turmeric (opens in a new tab)
View Formula & Supplement Facts for Turmeric + BioPerine FormulaMelatonin · valerian root 150 mg · chamomile, lemon balm, passionflower, GABA, L-tryptophan 100 mg each
Dose per serving
2 mg
Melatonin · 2 capsules · 30 servings
One clear job
Tell the body clock that it's night
Key research context
Moderate
A 2013 meta-analysis of 19 trials in people with primary sleep disorders found that melatonin cut the time to fall asleep by about 7 minutes and added about 8 minutes of sleep: a real effect, but a modest one. Evidence for the botanicals is less consistent.
Ferracioli-Oda et al., PLoS One, 2013 (opens in a new tab) NCCIH, Melatonin (opens in a new tab)
View Formula & Supplement Facts for Sleep+ FormulaNAD+ · quercetin dihydrate (Sophora japonica) · Japanese knotweed extract (98% resveratrol)
Dose per serving
500 mg
NAD+ · with 250 mg quercetin and 150 mg knotweed extract · 2 capsules
One clear job
A coenzyme in cellular energy metabolism
Key research context
Emerging
Most human research has studied NAD+ precursors (NR and NMN) rather than NAD+ taken by mouth, and those trials have been small and short. It isn't yet established how much oral NAD+ reaches cells intact.
No expert consensus statement exists yet for oral NAD+.
View Formula & Supplement Facts for NAD+Looking for an ingredient not listed here? Browse the ingredient library
04Research integrity
The studies cited here were run by independent scientists on individual ingredients, not on ZuvoNutrition products. When we describe a finding, we're describing that ingredient, at that dose, in the people studied. When we describe a product, we're describing its label.
From research to routine
Our guide walks you through choosing by goal, form and dose. The bundle builder lets you combine formulas into a single daily routine.
These statements have not been evaluated by the Food and Drug Administration. ZuvoNutrition products are not intended to diagnose, treat, cure or prevent any disease. This page is general information, not medical advice. Talk to your doctor before starting a supplement if you are pregnant or nursing, under 18, take medication or have a medical condition.
