SIGNAL

NMN — β-Nicotinamide Mononucleotide — is a naturally occurring molecule your cells use as the direct raw material to produce NAD+ through the body's salvage biosynthesis pathway.* NAD+ is a coenzyme researchers associate with cellular energy metabolism, enzyme function, and metabolic regulation — it participates in hundreds of biochemical reactions throughout the body.*

Research suggests NAD+ levels decline significantly with age, with some studies associating a drop of roughly 50% between your 20s and 50s.* NMN supplementation has been examined in human clinical trials for its role in supporting cellular NAD+ biosynthesis and healthy aging.* SIGNAL delivers 500mg of pure β-NMN — the upstream molecule that starts that process.

NMN and NAD+ work on the same cellular pathway but at different points — and that distinction matters. NAD+ is the active coenzyme your cells use directly. NMN is the precursor molecule your cells convert into NAD+ through natural biosynthesis.* NAD+ is the fuel. NMN is where the fuel gets made.

SIGNAL delivers 500mg of β-NMN — the upstream, precursor-first approach.* REWIND delivers 500mg of NAD+ directly, alongside Quercetin and Resveratrol — the direct delivery approach.* Because they work at different points in the same pathway, they are complementary rather than redundant. For comprehensive cellular NAD+ support, the Happy Cells Complete NAD+ Protocol stacks both.*

Individual results vary. Human research protocols studying NMN have typically run 8–12 weeks, which researchers consider the minimum period for evaluating changes at the cellular and metabolic level.* We recommend at least 60 days of consistent daily use before drawing conclusions.

Some participants in NMN research have reported changes in energy levels and physical performance metrics within the first few weeks.* However, the most studied changes — those occurring in cellular NAD+ metabolism — develop cumulatively rather than overnight.* Consistency is the protocol. One capsule, every morning, is what that looks like in practice.

Human clinical trials studying NMN have used doses ranging from 250mg to 1,200mg per day, with 500mg being the most commonly studied dose in published human research — including trials at Washington University School of Medicine.* SIGNAL delivers exactly 500mg of pure β-NMN per capsule, listed clearly on the label.

Many NMN supplements on the market use 125–250mg per serving or hide their dosage inside proprietary blends. SIGNAL discloses the full 500mg dose with no blending and no guessing — it's printed in the product name. As with any supplement, consult your healthcare professional before starting, especially if you have a known medical condition.

NMN has been examined in multiple human clinical trials with no significant adverse effects reported at standard doses.* A randomized, placebo-controlled clinical trial at Washington University School of Medicine found oral NMN supplementation to be safe and well-tolerated in healthy adult women.*

SIGNAL contains no allergens, no gluten, no lactose, no artificial additives, and uses a vegan HPMC vegetable capsule. It is manufactured in the USA. That said, every individual is different — pregnant or nursing mothers, anyone under 18, and individuals with known medical conditions should consult a physician before use.

Yes — and it is how SIGNAL is designed to be used. NMN and NAD+ act on different points in the same cellular pathway, making them complementary rather than overlapping.* SIGNAL provides the upstream NMN precursor your cells convert into NAD+ through biosynthesis.* REWIND delivers NAD+ directly alongside Quercetin and Resveratrol for comprehensive cellular support.*

Together, SIGNAL and REWIND form the Happy Cells Complete NAD+ Protocol — supporting the pathway from two directions simultaneously.* Both capsules can be taken together in the morning with 6–8 oz of water.

Morning is the recommended time. NAD+ plays a central role in cellular energy metabolism, and the timing protocols used in most published NMN research align intake with the morning hours.* Take one SIGNAL capsule with 6–8 oz of water, with or without food. If stacking with REWIND, take both together. The simpler the habit, the easier it is to stay consistent — and consistency is what the research reflects.*

Yes — NMN is found naturally in broccoli, avocado, edamame, tomatoes, and cucumber, among other foods.* However, the concentrations in food are a fraction of the doses studied in clinical research. To approach the 500mg used in human NMN trials, you would need to consume several pounds of broccoli daily.*

SIGNAL delivers 500mg of pure β-NMN per capsule — the researched dose, without the side of vegetables.