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Compound Deep-Dive

Tier 2: Grey AreaAn essential vitamin best obtained through diet unless targeting specific metabolic markers under medical guidance.

Vitamin B3 (Niacin)

Nicotinic acidNicotinamideNiacinamideVitamin B3

Essential vitamin, intense flushing risk.

Hype Risk

4/10

Noticeability

9/10

Evidence Tier

Strong

Cost / Month

~$3

Flushing isn't detox

What it's actually good for

Energy

Research Supported

Essential cofactor for mitochondrial ATP production.

Longevity

Mixed Evidence

Effective NAD+ precursor, but high doses may negatively impact insulin sensitivity.

Mood

Weak Evidence

Historical use in orthomolecular medicine lacks modern high-quality RCT support.

Focus: neutralSleep: neutralMuscle: neutralRecovery: neutralImmunity: neutral

How it works

Niacin is an essential B-vitamin critical for NAD+ production and energy metabolism. While it effectively raises HDL cholesterol and lowers triglycerides, large-scale clinical trials have failed to show a reduction in cardiovascular events when added to standard statin therapy.

Functions as a precursor to the coenzymes NAD and NADP, which are essential for over 400 biochemical reactions including ATP production and DNA repair.

Safety

  • Commonly causes a 'niacin flush' (redness, itching, burning) at doses above 35mg.
  • High doses can impair glucose tolerance and increase the risk of new-onset diabetes.
  • Sustained-release forms carry a higher risk of hepatotoxicity compared to immediate-release forms.

The full StackRoast report adds

  • The exact dose, timing, and effective range to actually run it at
  • Where people go wrong with it — the dose-creep and timing traps
  • What Vitamin B3 (Niacin) clashes with or duplicates in your stack
Roast My Stack →

Community Reality Check

Distilled from 1200 threads
Confidence: high

What users report

  • Improved lipid profiles
  • Noticeable energy boost
  • Post-flush relaxation

The catch

  • Intense skin burning
  • Anxiety from flush reaction
  • Gastrointestinal distress

Side effects reported

  • Skin flushing
  • Itching
  • Nausea
  • Increased blood sugar
https://www.reddit.com/r/Supplements/https://www.reddit.com/r/Nootropics/

The Receipts

9 sources— studies, videos & links

Videos

Vitamin B3 Linked To Heart Disease

Dr. Brad Stanfield

Explores the recent research linking high-dose niacin to cardiovascular inflammation.

Niacin vs NR vs NMN

Dr. Brad Stanfield

Compares niacin to expensive NAD+ boosters and discusses gut microbiome conversion.

Papers

Creators

Dr. Brad Stanfield

YouTube

Medical doctor specializing in longevity and evidence-based supplement analysis.

Thomas DeLauer

YouTube

Health and nutrition educator focusing on metabolic health and B-vitamin pathways.

Clinical Sources

Taking Vitamin B3 (Niacin) in a stack? Find out if the combination actually makes sense.

Roast My Stack →