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NAD+ Supplement Guide: NR vs NMN and What the Research Says

8 min read•

NAD+ (Nicotinamide Adenine Dinucleotide) is not a supplement trend. It is a fundamental coenzyme present in every living cell, required for over 500 enzymatic reactions in the human body. Without adequate NAD+, your mitochondria cannot produce energy, your liver cannot detoxify, and your DNA cannot repair itself.

In chronic illness — particularly mold toxicity and CCI — NAD+ levels are depleted to a degree that standard metabolic function stalls. Here is what you need to know about restoring it.

Why NAD+ Matters in Chronic Illness

NAD+ is required for three critical functions that are all compromised in CIRS, CCI, and MCAS:

1. Mitochondrial Energy Production

The electron transport chain (where ATP is made) requires NAD+ as a primary electron carrier. When NAD+ is depleted, ATP production drops. This is the biochemical basis of the crushing fatigue that defines chronic illness.

2. Sirtuin Activation

Sirtuins are a family of proteins that regulate cellular repair, inflammation, and aging. SIRT1, SIRT3, and SIRT6 all require NAD+ as a co-substrate. When NAD+ is low, sirtuin activity drops, and the body loses its ability to self-repair and regulate inflammation.

3. PARP Activity (DNA Repair)

PARP enzymes repair DNA damage caused by oxidative stress. In mold toxicity, oxidative stress is dramatically elevated, which increases PARP activity, which consumes more NAD+, creating a vicious cycle of depletion.

NR vs NMN: The Biosynthetic Pathway

NAD+ is synthesized from precursors via the salvage pathway:

Niacin → NR → NMN → NAD+

Both NR and NMN are converted to NAD+. The debate is which one is more efficient.

Nicotinamide Riboside (NR)

  • Brand examples: Tru Niagen, Elysium Basis
  • Human trials: Multiple published RCTs showing safe and effective NAD+ elevation
  • Conversion: NR → NMN → NAD+ (two steps)
  • Bioavailability: Well absorbed orally, extensively studied pharmacokinetics
  • Cost: Moderate ($40-60/month)

Nicotinamide Mononucleotide (NMN)

  • Brand examples: ProHealth, DoNotAge
  • Human trials: Fewer published RCTs, but growing body of evidence
  • Conversion: NMN → NAD+ (one step, theoretically faster)
  • Bioavailability: Debated. Some evidence NMN is converted to NR in the gut before absorption, negating the "one step closer" advantage.
  • Cost: Higher ($50-80/month)

The Verdict

For chronic illness patients, NR is the safer starting choice because it has more published human safety data and is generally better tolerated. NMN is a reasonable option if NR is not effective.

Dosing Protocol

Standard Maintenance

  • 250mg to 500mg daily of NR or NMN
  • Take in the morning (NAD+ has circadian effects and may disrupt sleep if taken at night)
  • With or without food

Chronic Illness Recovery (Aggressive)

  • 500mg to 1,000mg daily for the first 3 months
  • Reduce to 250mg to 500mg for maintenance
  • Consider adding TMG (trimethylglycine) 500mg to support methyl groups consumed during NAD+ metabolism

IV NAD+ (Clinical Setting)

  • 250mg to 750mg infused over 2 to 4 hours
  • Typically administered 2 to 4 times per month
  • Cost: $750 to $1,500 per session
  • Significant Herxheimer risk in toxic patients — start with 250mg

Supporting the NAD+ Stack

NAD+ does not work in isolation. The following co-factors optimize the pathway:

  • B-Complex — B2 (riboflavin) and B3 (niacin) are direct NAD+ precursors
  • Magnesium — Required co-factor for NAD+-dependent enzymatic reactions
  • TMG (Trimethylglycine) — Replenishes methyl groups consumed by NAD+ metabolism
  • Resveratrol — Activates SIRT1, amplifying the effects of elevated NAD+
  • CoQ10 — Supports electron transport chain function alongside NAD+

When to Start NAD+ in the Recovery Sequence

NAD+ is a powerful tool, but timing matters:

  1. First: Open drainage pathways (liver, kidneys, lymph) — 30 days
  2. Then: Start binders to reduce mycotoxin burden — 30 days
  3. Then: Introduce NAD+ precursors once the body can handle the increased metabolic activity

Starting NAD+ too early in a toxic patient can accelerate cellular processes faster than the drainage system can handle, triggering severe Herxheimer reactions.

Disclaimer: I am a researcher, not a doctor. This information is for educational purposes only. Consult with a qualified practitioner before starting NAD+ supplementation.