Dosing protocols without exaggeration

The most comprehensive evidence review available, the 2017 report 'The Health Effects of Cannabis and Cannabinoids' published by the National Academies of Sciences, Engineering and Medicine (NASEM), evaluated over 10,700 study abstracts and reaches a clear conclusion: cannabis effects are overall insufficiently researched, and the findings are inconsistent. That's not an excuse to do without numbers - but it's a good reason to present numbers as starting points rather than exact truths.

Consumer-facing harm-reduction sources largely agree: DanceSafe recommends 2.5mg THC as a starting point, Leafly names 2.5mg as a 'microdose' starting point and 5mg as an amount that already feels noticeably intoxicating to some users.

One clinical protocol is even more cautious: in 2018, MacCallum and Russo recommend that cannabis-naive patients start with just 1.25-2.5mg THC before bedtime, over two days, followed by an increase of another 1.25-2.5mg every two days if tolerated. The same source notes that daily doses above 20-30mg can increase the risk of side effects in a medical context without providing additional benefit.

This gap between 2.5-5mg (consumer consensus) and 1.25-2.5mg (clinical protocol) is not a contradiction to be resolved - it demonstrates exactly the point of this article: there is no single correct number, but a range that depends on context.

In Colorado, the law limits a single serving of an edible product to 10mg THC (a maximum of 100mg per package). This number is explicitly intended as a 'full' adult dose - not as a recommendation for first contact. Someone trying an edible for the first time and eating the entire standard serving is often taking two to four times the starting recommendations mentioned above.

Titration means: starting with a low dose and gradually increasing it across several separate applications (sessions), based on the effect actually observed - instead of trying to calculate a single 'correct' dose in advance. This exact principle underlies both the clinical MacCallum-Russo protocol and the recommendations from DanceSafe and Leafly. It's the responsible default approach - not because it's convenient, but because it builds on your own response instead of on someone else's table.

Five factors explain why the same mg number affects different people - and even the same person on different days - differently:

Oral bioavailability varies between roughly 4 and 12% and depends, among other things, on stomach contents (see the article on oral products).

Body composition: THC is fat-soluble and gets stored in adipose tissue, which acts as a kind of reservoir. This is a real but strongly simplified picture - the actual pharmacokinetics are more complex than 'less body fat = stronger effect'.

Metabolic and enzyme genetics: the activity of the liver enzymes CYP2C9 and CYP3A4 varies genetically and influences how quickly and how strongly THC acts and how much 11-hydroxy-THC is produced in the process.

Tolerance: regular use leads to a downregulation of cannabinoid receptors, so more substance is needed for the same effect. This aligns with observations from driving-fitness research, where regular users showed shorter actual impairment windows despite higher blood levels (see the article on set and setting).

Route of administration: the same mg figure has a noticeably different strength and speed of effect when inhaled, swallowed, or held sublingually - this is ultimately what connects all four articles in this series.

There is also no single number for how long you should wait before redosing. Basic recommendations name 60-90 minutes, official guideline values from the Colorado Department of Transportation range from 90 minutes to 4 hours, and more experienced consumer sources recommend waiting out the full expected effect duration of 4-6+ hours within the same session before even considering a second dose. This range, too, is not a flaw in the guidance but an honest expression of how differently the duration of effect actually turns out.