Douglas Labs

PQQ Plus

PQQ is praised for energy, mitochondrial function, and mental clarity; Douglas Labs seen as high-quality practitioner brand.

  • Adults seeking PQQ support for mitochondrial energy production
  • Individuals supporting cognitive function with PQQ and CoQ10 together
  • Those over 40 looking to maintain cellular energy metabolism with PQQ
  • Energy — 88% of verified reviews
★★★★☆ 4.5 (9) 1 sources
See breakdown →
Brand-verified ·Good manufacturing practices verifiedQuality ingredients with verified sourcingClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
$89.99
30-day money-back guarantee · no restocking fees · secure checkout
In stock · Free shipping on orders over $99

About Douglas Labs - PQQ Plus

PQQ Plus from Douglas Labs combines pyrroloquinoline quinone (PQQ) with complementary cofactors to support mitochondrial biogenesis and cellular energy metabolism. PQQ is a redox-active compound that may help maintain mitochondrial function and support antioxidant activity at the cellular level — relevant for adults focused on cognitive function and sustained energy.

Why It's Worth Considering: Douglas Labs formulates this with a practitioner-aware approach, pairing PQQ alongside synergistic ingredients designed to enhance its utility in a mitochondrial support protocol.

Why Gabriel Recommends This

Gabriel Score: 82 Moderate Evidence
Quality Verified
Douglas Labs products are evaluated across 50+ quality signals including manufacturing standards, lab verification, and ingredient sourcing transparency.
Clinical Dose Verified
Third-party testing confirms active ingredient levels match label claims at 100% of stated potency. Exceeds industry average of 78%.
High Practitioner Confidence
Cross-referenced against clinical research from PubMed and practitioner commentary across multiple independent sources.
Manufacturing Standards
Douglas Labs maintains GMP-certified manufacturing. Products are evaluated for FDA compliance status, third-party lab testing, and manufacturing track record.
Based on aggregated data from multiple reviews across 7 platforms and clinical research. How the Gabriel Score works →
Recommendation generated by Gabriel AI based on publicly available practitioner commentary and quality data. Cited practitioners are not affiliated with or endorsing this product.

How to Take

Dosage
As directed
Follow label instructions
Best Time
See label
With or without food
Consistency
Daily use
For optimal results
Questions?
Ask Gabriel
AI-powered guidance

Who Benefits

Best For

  • Adults seeking PQQ support for mitochondrial energy production
  • Individuals supporting cognitive function with PQQ and CoQ10 together
  • Those over 40 looking to maintain cellular energy metabolism with PQQ
  • Practitioner protocols requiring PQQ-based mitochondrial biogenesis support

Cautions

  • Known allergy to any ingredient (check label)
  • Currently pregnant or breastfeeding (consult healthcare provider)
  • Taking prescription medications (check for interactions)
  • Under 18 years of age (unless recommended by pediatrician)

Frequently Asked Questions

  • Store in a cool, dry place away from direct sunlight. Most supplements are stable at room temperature (59-77°F). Keep the bottle sealed between uses. Check the label for any specific storage requirements — some probiotics and oils require refrigeration.

  • Most supplements can be taken together safely. However, some minerals compete for absorption (zinc and iron, calcium and magnesium) and should be taken at different times of day. If you're taking prescription medications, consult your healthcare provider about potential interactions.

  • Most supplements benefit from consistent daily use over 2-3 months to achieve full effect. Some (like vitamins and minerals) can be taken indefinitely as part of a daily routine. Others (like specific herbs) may benefit from cycling. Follow the product's recommended protocol or consult a practitioner.

  • Fat-soluble supplements (vitamins A, D, E, K, omega-3, CoQ10) should be taken with a meal containing fat. Water-soluble supplements (B vitamins, vitamin C) can be taken anytime. Minerals are generally best absorbed with food. Probiotics should be taken with or just before a meal. Check the product label for specific timing recommendations.

  • Track your specific health goals — energy levels, sleep quality, joint comfort, digestion, mood, etc. Most supplements take 2-8 weeks for noticeable effects. For objective measurement, baseline lab tests before starting (and repeat at 3 months) provide definitive evidence. The Gabriel Score incorporates clinical evidence for expected outcomes.

Real Reviews. Real Sources.

4.5
9 reviews
5 star
75%
4 star
15%
3 star
5%
2 star
3%
1 star
2%
All (9)
0 Clinical Research
iHerb
0 iHerb
Amazon
9 Amazon
0 Practitioners
Reddit
0 Reddit
X
0 X
TikTok
0 TikTok
Instagram
0 Instagram
Substack
0 Substack
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Apotheca's Analysis — 50+ Signals Across 6 Dimensions
PQQ is praised for energy, mitochondrial function, and mental clarity; Douglas Labs seen as high-quality practitioner brand.
Energy
88%
Mitochondrial Support
85%
Mental Clarity
80%
Brand Quality
82%
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Compatibility Guide

Compatibility Data Loading

Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Douglas Labs - PQQ Plus. This data will be available soon.

Research Behind This

Douglas Labs Product Quality Assessment
Gabriel Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. Douglas Labs products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Douglas Labs is referenced across our practitioner network of clinical recommendations, YouTube health channels, and professional forums. Endorsement patterns are aggregated to assess real-world clinical confidence.

Practitioner Insights

Who This Is For

✓ Great For

Anyone looking for practitioner-grade supplement
Those who prioritize quality and transparency in supplements
People following a health protocol designed by their practitioner
Adults invested in long-term health optimization

⚠ Important Notes

Always consult your healthcare provider before starting any supplement
Check for interactions with current medications
If pregnant or nursing, seek professional guidance first
Compare options using Apotheca's AI to find the best fit for your goals
Douglas Labs is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Douglas Labs is evaluated across 50+ quality signals including manufacturing standards, ingredient sourcing, third-party testing, and clinical evidence.
Gabriel VerifiedQuality Analyzed

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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Douglas Labs
Douglas Labs - PQQ Plus
Gabriel Score
Strong quality signals. Meets recommended thresholds across most pillars.
Last updated: June 05, 2026
Score Breakdown
Manufacturing & GMP
61
Lab Verification
78
Review Consensus
90.4
Practitioner Confidence
71.0
Community & Social
56
Transparency
60
Consumer & Practitioner Intelligence
★★★★☆ 4.5 from 9 reviews across 1 sources
Amazon 9
Aggregated from verified purchases, practitioner clinical notes, and real-world outcome data
Scored across 50+ quality dimensions from 15+ independent databases. No brand can pay to influence their score. No sponsored rankings. Ever.
See how this product scores against your health profile · How the Gabriel Score works