on September 27, 2026
Quick answer: Many published human PQQ studies have used approximately 20 mg per day, often taken after breakfast. That pattern describes the protocols chosen by researchers. PQQ has no established U.S. Daily Value, and the human studies reviewed for this guide do not directly compare morning with night or fed with fasted dosing.
Your most reliable starting point is the serving size, ingredient form and directions on the specific product label. A qualified healthcare professional can help evaluate personal factors such as medications, medical conditions and overlapping supplements.
Key Takeaways
- Several human PQQ studies used 20 mg per day, although study populations, durations and endpoints varied.
- Multiple trials administered PQQ after breakfast, supporting a practical morning routine without proving that morning produces superior results.
- Current human evidence does not establish a direct fed-versus-fasted advantage.
- Study dose, regulatory intake condition, product serving and personal daily intake describe different concepts.
- NyxSeren Venus contains 20 mg of PQQ (Pyrroloquinoline Quinone Disodium Salt) per two-capsule serving and is positioned within the daytime MVD routine.
What Does “PQQ Dosage” Actually Mean?
PQQ stands for pyrroloquinoline quinone. Supplement labels commonly provide it in a stabilized salt form, including pyrroloquinoline quinone disodium salt.
A dosage number gains meaning only when it is connected to its context. A research paper may report an amount used for a defined study population. A regulator may assess a proposed intake under specific conditions. A product label states the amount in one serving. A person’s total daily intake may also include more than one product.
| Dosage Term | What It Describes | How to Use It |
|---|---|---|
| Study dose | The amount selected for a specific research protocol. | Interpret it alongside the population, duration, formulation and outcome. |
| Regulatory condition | The population and intake level evaluated for a defined use. | Keep the specified population and exclusions attached to the conclusion. |
| Amount per serving | The PQQ quantity supplied by the serving shown on the label. | Read it together with serving size and directions. |
| Total daily intake | PQQ obtained from every supplement used during the day. | Check combination products for duplicated ingredients. |
What PQQ Dosages Have Human Studies Used?
Twenty milligrams per day appears repeatedly in published PQQ research. This repeated use shows a common study design choice. Broader evidence would be needed to establish a universal intake standard.
A small 2013 crossover study gave 10 healthy adults a single weight-based dose of 0.2 mg/kg and, in a separate phase, a daily dose of 0.3 mg/kg. The researchers measured plasma and urinary PQQ along with selected metabolic markers. The small sample and weight-based design limit its use as a general dosing rule.
A 2016 randomized controlled trial gave 41 healthy older adults 20 mg of PQQ disodium salt per day for 12 weeks. A 2023 double-blind study also used 20 mg per day for 12 weeks in adults aged 20 to 65. Participants in the 2023 study took one capsule with water after breakfast each day.
| Source | Participants | PQQ Protocol | Interpretation Boundary |
|---|---|---|---|
| Harris et al., 2013 | 10 healthy adults | Single 0.2 mg/kg dose and a separate 0.3 mg/kg daily phase | Exploratory, weight-based protocol with a small sample |
| Itoh et al., 2016 | 41 healthy older adults | 20 mg per day for 12 weeks | Population- and endpoint-specific cognitive study |
| Tamakoshi et al., 2023 | Healthy adults aged 20–65 | 20 mg per day with water after breakfast for 12 weeks | The protocol did not compare other times of day |
| EFSA, 2017 | Healthy-adult intended-use assessment | Maximum proposed intake of 20 mg per day | Safety conclusion applies to the specified intended conditions |
These studies answer narrow research questions. They do not establish that every adult needs 20 mg, that larger amounts produce greater benefits or that every PQQ formulation behaves identically.
Does PQQ Have an Established Daily Value?
PQQ has no established U.S. Daily Value. A Supplement Facts panel can therefore list the quantitative amount per serving while indicating that the Daily Value has not been established.
The FDA dietary supplement labeling guide explains that ingredients without Daily Values must still be identified by their common or usual name and quantitative amount per serving.
This makes the label amount especially important. Compare products by chemical form, serving size, amount per serving and directions instead of relying on percentage language such as “high strength.”
Should You Take PQQ in the Morning or at Night?
The human trials reviewed for this guide do not include a direct morning-versus-night comparison. Several published studies scheduled PQQ after breakfast, which makes morning use the better-documented routine pattern.
That morning pattern can support three practical goals:
- It follows the schedule used in several human studies.
- It places a mitochondrial-support ingredient within the active part of the day.
- It creates a consistent daily cue that may improve routine adherence.
Daytime placement is a routine-design choice. Current PQQ trials do not establish a circadian-reset effect, and PQQ should not be treated as a substitute for morning light, regular sleep timing, meals or movement.
For a wider framework covering vitamins, minerals and other supplement categories, read the best time to take supplements guide.
Should You Take PQQ With or Without Food?
Several PQQ trials administered the study capsule after breakfast with water. Those protocols confirm that after-breakfast use has been studied. They were not designed to compare PQQ absorption after a meal with absorption during fasting.
Product-specific directions should guide the decision. Formulation, capsule materials and companion ingredients may differ between products. Someone with a sensitive stomach may also have personal tolerability considerations that deserve professional guidance.
A precise answer therefore follows this sequence:
- Read the serving size and full directions.
- Check whether the manufacturer specifies food, water or a particular time.
- Use one consistent schedule.
- Review overlapping formulas before combining products.
- Discuss medication or health-condition questions with a qualified clinician.
How to Build a Clear PQQ Routine
| Decision | Practical Action | Reason |
|---|---|---|
| Choose the amount | Start with the labeled serving and professional guidance. | Research protocols do not function as universal prescriptions. |
| Choose the time | Use the manufacturer’s schedule at a repeatable daily time. | Consistency improves adherence and makes responses easier to evaluate. |
| Choose the meal relationship | Follow any with-food or after-food instruction on the product. | Food-effect evidence cannot automatically transfer across formulations. |
| Check the total | Add PQQ amounts from every supplement in the routine. | Combination products can duplicate the same ingredient. |
| Evaluate the routine | Change one variable at a time and record timing and tolerance. | A stable routine produces clearer observations. |
Where NyxSeren Venus Fits
NyxSeren places PQQ on the daytime side of its Circadian System through Venus Metabolic Vitality Drive.
The current NyxSeren ingredient specification lists PQQ (Pyrroloquinoline Quinone Disodium Salt): 20 mg per two-capsule serving. The current Venus product directions state: take two capsules once daily, 30 minutes after breakfast.
This schedule aligns with the after-breakfast administration used in several published PQQ trials. The product remains a multi-ingredient daytime formula, so findings from isolated PQQ studies cannot be assigned to the complete Venus formula.
Venus is positioned for daytime vitality, metabolic support, antioxidant defense and mitochondrial readiness. Readers who want the broader ingredient framework can explore the guides to PQQ and daytime mitochondrial support and mitochondrial support supplements.
Who Should Get Professional Guidance First?
EFSA’s PQQ assessment covered use in healthy adults under the applicant’s intended conditions. Children, pregnant women and lactating women were outside the intended population described in that assessment.
Professional guidance is appropriate for anyone who is pregnant or breastfeeding, uses prescription medication, manages a medical condition, has a planned medical procedure or combines several supplements with overlapping ingredients.
Safety conclusions also depend on the tested chemical form, purity, amount and intended use. The FDA’s response to a GRAS notice addresses the notifier’s conclusion for specified food uses. It does not establish supplement efficacy or a personal dosage recommendation.
The Bottom Line
Twenty milligrams per day is a recurring amount in human PQQ research, and several trials scheduled PQQ after breakfast. These patterns provide useful context for reading a label. They leave morning-versus-night superiority and fed-versus-fasted superiority unresolved.
A disciplined PQQ routine starts with four checks: the exact ingredient form, amount per serving, manufacturer’s directions and total intake from every product. NyxSeren Venus applies this logic through a two-capsule daytime serving scheduled 30 minutes after breakfast.
Sources
- Dietary PQQ and mitochondrial-related metabolism in human subjects
- Randomized controlled study of PQQ disodium salt in healthy older adults
- PQQ disodium salt study in younger and older adults
- EFSA safety assessment of PQQ disodium salt
- FDA dietary supplement nutrition-labeling guidance
- FDA response to GRAS Notice No. 625
Frequently Asked Questions
What PQQ dosage is commonly used in human studies?
Several human studies have used 20 mg of PQQ per day, often for periods ranging from several weeks to 12 weeks. These amounts describe specific research protocols. Personal use should follow the product label and qualified professional guidance.
Should I take PQQ in the morning or at night?
The human studies reviewed for this guide do not directly compare morning with night. Several trials administered PQQ after breakfast, making morning the better-documented routine pattern.
Should PQQ be taken with or without food?
Several published studies administered PQQ after breakfast with water, although they did not directly compare fed and fasted absorption. Follow the directions provided for the specific product.
Does PQQ have an established Daily Value?
PQQ has no established U.S. Daily Value. Supplement labels should still state the ingredient’s quantitative amount per serving and identify that the Daily Value has not been established.
How does NyxSeren Venus schedule PQQ?
NyxSeren Venus provides 20 mg of PQQ (Pyrroloquinoline Quinone Disodium Salt) per two-capsule serving. Its current product directions say to take two capsules once daily, 30 minutes after breakfast.