NMN vs Soy Protein Isolate
Nootropic vs Protein · evidence-backed comparison
- • Soy Protein Isolate has the stronger evidence base (moderate (some rcts)).
- • NMN has the broader effect profile across the 9 effect categories.
- • Soy Protein Isolate is cheaper per serving ($0.60 vs $1.80).
- • Soy Protein Isolate has higher bioavailability (better absorption).
Side-by-side traits
| Trait | NMN | Soy Protein Isolate |
|---|---|---|
Category | Nootropic | Protein |
Active compound | Nicotinamide mononucleotide | Soy isoflavones + amino acid blend |
Form available | Capsule, Powder, Liquid | Powder |
Source | synthetic | plant |
Typical dose | 250–1000 mg daily | 25–40 g per serving |
Dose range | 250–1000 mg | 25–40 g |
Loading protocol | — | — |
Best taken with | empty stomach or with food | water or plant milk |
Best time of day | morning | post-workout |
Bioavailability How efficiently the body absorbs and utilizes the compound. | Moderate (3/5) | High (4/5) |
Onset time | Cumulative: 4–12 weeks | Acute: 45–75 min |
Half-life | — | — |
Evidence level Quality and quantity of human research. | Preliminary (animal / pilot studies) | Moderate (some RCTs) |
Overall effect Subjective effect magnitude. | Moderate (3/5) | Moderate (3/5) |
Muscle / strength | Low (2/5) | High (4/5) |
Physical energy | High (4/5) | Low (2/5) |
Focus / cognition | Moderate (3/5) | Very Low (1/5) |
Mood / stress | Low (2/5) | Low (2/5) |
Sleep quality | Very Low (1/5) | Low (2/5) |
Immunity | Low (2/5) | Low (2/5) |
Recovery Post-exercise recovery support. | Moderate (3/5) | High (4/5) |
Longevity / healthspan | Very High (5/5) | High (4/5) |
Safety rating 5 = exceptionally well-tolerated; 1 = significant risk profile. | High (4/5) | High (4/5) |
Price per serving Approximate USD per typical daily dose. | $1.80 | $0.60 |
Vegan friendly | Yes | Yes |
Gluten free | Yes | Yes |
3rd-party tested | Yes | Yes |
About NMN
NAD+ precursor with strong rodent longevity data. Human evidence is preliminary but growing for energy, metabolic health, and athletic performance.
About Soy Protein Isolate
Complete plant protein with all 9 EAAs. Equivalent muscle-building to whey in older adults; mild cardio-protective effects from isoflavones.
Vetted brands, third-party testing, ships worldwide.
Vetted brands, third-party testing, ships worldwide.
NMN safety
Common side effects:
- • GI upset (rare)
- • Flushing
Avoid if:
- • Pregnancy (insufficient data)
Drug interactions:
- • Gout meds (increases uric acid in some)
Soy Protein Isolate safety
Common side effects:
- • Mild estrogen-mimicking (debated, minor)
Avoid if:
- • Soy allergy
- • Hormone-sensitive cancers (consult MD)
Drug interactions:
- • Thyroid meds (levothyroxine)
Common uses
- • Anti-aging
- • Energy
- • Metabolic health
- • Athletic recovery
Stacks well with: Resveratrol, tmg
Common uses
- • Vegan muscle gain
- • Heart health
- • Menopause support
Stacks well with: Creatine Monohydrate
Related comparisons
Medical disclaimer
SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements — especially if you are pregnant, breastfeeding, take prescription medication, or have a chronic condition.