The Signal
Make sense of what’s on the label. Independent ingredient research, honest evidence grades, and practical guides to help you ask better questions.
Educational content
The Signal content is educational and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Talk to a qualified clinician before starting any supplement.
Latest research
Recent perspectives on ingredients, labels, and the evidence behind them. Written and fact-checked against our published Evidence Standard.
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An NPN means Health Canada reviewed a product's safety, quality, and claims before it went on sale. It tells you a dose cleared a permitted minimum, not where that dose sits in the studied range. Here's the arithmetic that answers the second question, using our own formula as the worked example.
What human research reports about melatonin's side effects, how modest its real sleep effect is, who should be cautious, and why a smaller dose is usually the smarter one.
Ginkgo and Panax ginseng both turn up in cognitive-support formulas, but the human evidence points them at different problems. A neutral, evidence-graded comparison of what each is actually studied for.
Lion's mane has a devoted following and a thin human evidence base. A verdict-style, evidence-graded look at what the small human trials actually found, what they didn't test, and what "worth it" honestly depends on.
A plain-English look at what "adaptogen" actually means, where the term came from, what the human evidence does and does not support for rhodiola, ashwagandha, and ginseng, and how to pick one by real need.
The 5 most recent of 53 articles. Every piece is filed under a topic below, and new ones go out via RSS.
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From understanding the basics to checking a label, explore the questions that matter to you.
Ingredient profiles
Every ingredient gets the same template: summary, evidence grade, dose, form, side effects, interactions, stacking, and label guidance. Here are three under consideration for Signal State Core; 54 are profiled in the full library.
An amino acid found in tea leaves. It is studied for promoting a calm, settled kind of attention without sedation, which fits a stimulant-free focus direction.
A choline-donating compound the body uses in cell-membrane and neurotransmitter pathways. It is studied as a focus and mental-energy ingredient.
A traditional herb standardized for compounds called bacosides. It is studied mainly for memory and learning over sustained daily use, not for same-day effects.
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