Below is a table from Google (Gemini). It may be horribly wrong (had to correct it twice already), but the general idea I get is that NAD+ subq looks like it may be worth the greater cost (depending on age, tolerance to oral stimulants like clen , etc). Or trying oral NR supplements (or oral NAD+ and NMN (NMNH)), like on Amazon.
Rank Method Description Potential NAD+ Impact Key Considerations 1 NAD+ IV Therapy Direct infusion into bloodstream. Highest, Rapid Medical procedure, Costly, Limited long-term data. 2 NAD+ Subq Injection Injection under the skin. Significant, Relatively Rapid Requires sterile technique, Less human research than oral, Potential site reactions. 3 NR Supplements Oral NAD+ precursor, well-studied. Significant Oral, Good bioavailability, Quality control important. 4 Oral NAD+ Supplements Direct oral NAD+ delivery. Potentially Significant (bioavailability dependent) Oral, Bioavailability research ongoing, May require specific formulations for better absorption. 5 NMN Supplements Oral NAD+ precursor, promising research. Significant Oral, Bioavailability research ongoing, Quality control important. 6 NMN Subq Injection Injection of NMN under the skin. Potentially Significant, May have better bioavailability than oral NMN Requires sterile technique, Less human research than oral NMN/NR, Dosage protocols evolving. 7 High-Dose NAM Oral Vitamin B3 precursor, high doses can inhibit sirtuins. Moderate Oral, Lower cost, High doses may have negative effects. 8 Sirtuin Activators Compounds like Resveratrol, enhance NAD+ effects. Indirect Often dietary, Bioavailability varies, Efficacy under investigation. 9 Exercise Regular physical activity. Mild, Gradual Numerous other health benefits, Sustainable. 10 Caloric Restriction/IF Reduced calorie intake or eating windows. Mild, Gradual Requires planning, Not for everyone. 11 Dietary B3 Foods containing Niacin/Nicotinamide. Minimal Essential for health, Dietary intake alone has limited impact on boosting NAD+.
Ideally, for fatigue, I would combine approaches like something for NAD+ (subq NAD+, oral precursor, whatever), along with peptides/vitamins/supplements/TRT, and a low-dose stimulant for extra "support" as needed.
Regarding tirz fatigue specifically, more calories or carbs (even a daily potato

or glass of Fairlife chocolate milk) may give a boost (at least over time):
Post in thread 'Switching from sema to tiirz'
Apr 28, 2025
From what I remember hearing (on a Youtubed podcast), Dr. Seeds says that fatigue from peptides is your body healing (which sounds more like BS everyday but puts a positive spin on it).
Some info/advice from a future overlord (Google Gemini):
While fatigue is not listed as a common side effect of tirzepatide by the manufacturer, some individuals have reported experiencing it. Here's why tirzepatide might cause fatigue:
Reduced Calorie Intake: Tirzepatide can significantly decrease appetite, leading to lower calorie consumption. This reduced energy intake can result in...