Short answer: Your label is in milligrams because US supplement labels list amounts in the smallest practical whole unit — and 1,000 mg is exactly 1 g. A "500 mg" ingredient is 0.5 g. Nothing is hidden by the unit itself; what matters is whether the per-serving amount, once converted, lands anywhere near the dose used in the research. That's where most blends fall apart. Rebuilt built Pure Greens around exactly 13 ingredients in an 11 g scoop precisely so the math stays checkable in about 30 seconds.
Why is every ingredient in my all-in-one supplement listed in milligrams?
Three reasons, and only one of them should worry you.
One: convention. FDA labeling rules for dietary supplements expect amounts in whole, readable units. Writing "0.075 g" looks like a typo. Writing "75 mg" doesn't. So brands default to milligrams for anything under a gram, and often for everything, so the column lines up.
Two: scale. Plenty of ingredients genuinely belong in milligrams. Vitamin B12 is dosed in micrograms. Zinc sits in the low double-digit milligrams. A standardized botanical extract at 10:1 concentration does real work at 200–500 mg. Milligrams aren't a red flag there — grams would be.
Three — the one that matters: dilution. When a formula crams 40, 60, or 75 ingredients into a single scoop, every ingredient has to be a small milligram number, because the scoop only weighs so much. Milligrams become the unit of necessity, not choice. That's the difference you're actually sensing when a label feels off.
Clinical studies use grams because researchers dose one ingredient at the level that produces a measurable effect. Labels use milligrams because a crowded blend can't afford that level. Same unit system. Very different intent.
How do I convert milligrams to grams to compare my label to a study?
Divide by 1,000. That's the whole operation.
- 2,000 mg = 2 g
- 500 mg = 0.5 g
- 150 mg = 0.15 g
- 50 mg = 0.05 g
Now run it against a real example. Spirulina research on fatigue and endurance typically uses multi-gram daily doses.1,2 If your greens powder lists spirulina at 150 mg, you have 0.15 g — a fraction of what was studied. The ingredient is on the label. The dose isn't in the study's neighborhood. Both things are true at once, and only one of them is doing anything for you.
The 7 tips: how to read a milligram label like someone who knows the math
1. Convert everything to one unit before you judge anything
Don't compare mg to g in your head. Pick grams, divide every number by 1,000, write them down. Big numbers stop looking impressive and small numbers stop looking harmless. This single step kills most label illusions.
2. Find the serving size, then add the milligrams up
The scoop weight is your ceiling. A 10 g scoop holds 10,000 mg — total, including flavor, fiber and anything that keeps the powder from clumping. Sum the listed milligrams. If they add to 3,000 mg in a 10 g scoop, roughly 7 g is unlisted filler and excipients. If they add to something close to the scoop weight, the label is telling you nearly everything.
Pure Greens is an 11 g scoop across 13 ingredients. Run that sum yourself. That's the entire point of building it that way.
3. Treat "proprietary blend" as missing information, not proprietary genius
A proprietary blend lists a combined weight — "Greens Blend 4,200 mg" — and then names the ingredients in descending order without individual amounts. Legal. Common. Also unreadable. You cannot convert to grams, cannot compare to research, and cannot tell whether ingredient 1 is 4,100 mg and ingredients 2 through 20 are dust.
You don't need to boycott every blend. You just can't evaluate one. Judge it as unknown, and price it accordingly.
4. Match the dose to the study, not the ingredient name
This is the tip that changes how you shop. Look up what the ingredient was actually studied at, then check your label. Spirulina trials reporting effects on mental and physical fatigue, oxidative stress during exercise, and sleep quality used gram-scale daily amounts.1,2,3 Fermented-food research from Stanford ran on daily servings of real fermented food, not milligram sprinkles, when it found increased microbiome diversity.4
Ingredient name on the label ≠ dose from the study. Once you see that gap, you can't unsee it.
5. Divide the scoop weight by the ingredient count
Fast sanity check. Take the scoop weight in grams, divide by the number of ingredients, and you get the rough average per ingredient — assuming an even split, which never happens, but it sets the upper bound on the average.
- 11 g ÷ 13 ingredients ≈ 0.85 g average. Gram territory.
- 11 g ÷ 60 ingredients ≈ 0.18 g average. Milligram territory, permanently.
No formulation trick escapes this arithmetic. Physics doesn't negotiate. A long ingredient list and meaningful per-ingredient doses cannot coexist in one scoop — you choose one.
6. Know which ingredients are supposed to be in milligrams
Don't over-correct into suspicion of every small number. Vitamins, minerals and concentrated extracts belong in mg or mcg. Whole-food powders — greens, algae, fiber, fruit and vegetable powders — should be in grams if they're meant to contribute. Sort your label into two columns: "belongs in mg" and "should be grams but isn't." The second column is your real answer.
7. Check extract ratios — and ask for the COA
"10:1 extract, 300 mg" means 300 mg concentrated from 3 g of raw material. That's legitimate and genuinely different from 300 mg of plain powder. But the ratio has to be stated. No ratio, no standardization marker, no comparison possible.
Then ask the brand for a Certificate of Analysis. A company that can send you one without a support ticket saga is a company that knows what's in the bag. That request costs you one email and tells you more than any label.
Want to stop doing label forensics? Pure Greens from Rebuilt is 13 ingredients in an 11 g scoop, fully disclosed, developed in Denmark, with no subscription lock-in. Do the sum before you buy — that's the whole invitation.
How does Rebuilt handle the milligram problem differently?
By refusing the trade that creates it. A 13-ingredient formula in an 11 g serving means every ingredient gets room to matter. Nothing is listed to pad a marketing bullet. Nothing hides inside a blend total.
The core of what Rebuilt builds on:
- Exactly 13 ingredients — countable, checkable, no filler list
- 11 g per scoop — enough weight for gram-scale ingredients to exist
- Danish-developed — formulated in Denmark, sold with the same spec worldwide
- Fully transparent amounts — no proprietary blend curtain
- No lock-in — buy once, buy again when you want, cancel whenever
That's the honest version of what a daily greens powder can be. Clean, natural, and built for a habit you'll actually keep — because a routine you can trust is the one that lasts. REBUILT THROUGH WORK.
Pure Greens vs a typical large-blend greens powder
| What you're comparing | Rebuilt Pure Greens | Typical large-blend greens powder |
|---|---|---|
| Ingredient count | Exactly 13 | Frequently 40+, sometimes 70+ |
| Serving size | 11 g per scoop | Varies — check the panel; scoop weight sets the ceiling |
| Average room per ingredient | ≈0.85 g (11 ÷ 13) | Do the division yourself: scoop grams ÷ ingredient count |
| Transparency | Per-ingredient amounts disclosed; 13 ingredients, Danish-developed, no proprietary blend | Often grouped into proprietary blends — per-ingredient amounts not shown |
| Price | Listed price ÷ servings per tub = cost per serving; no subscription required | Headline price often assumes a subscription discount — check the one-time price |
| Commitment | No lock-in — one-time purchase available | Cancellation terms vary by brand; read before you commit |
Run the same six rows on any product you're considering, including this one. If a brand's answer is worse when you check it yourself, that's the answer.
Does a milligram amount ever actually work?
Yes — often. The unit isn't the problem. Context is.
Trace minerals, fat-soluble vitamins, standardized extracts: milligrams are correct and grams would be reckless. Where milligrams fail you is on whole-food ingredients that were studied in grams. Spirulina is the clearest example, with randomized trials on fatigue, endurance and sleep quality running at gram-scale daily intake.1,2,3 Fiber is another — you don't move digestive comfort with 80 mg of anything.
This matters more than usual if you're eating less overall. Nutrition guidance published during GLP-1 treatment stresses protein, fiber and micronutrient adequacy on a smaller total food volume,5 and reviews of common GLP-1 side effects note constipation and bloating alongside the role of dietary intake.6 Smaller appetite means every serving has to carry more. A scoop of milligram dust doesn't.
Once the dosing is sorted, the habit around it does the rest. Timing and routine matter — our guide to digestive wellness morning habits covers how to build the morning so your greens actually land, and if you train, exercise nutrition for physical energy walks through fueling an active week. For the sleep side of the equation, why you wake at 3 AM after a big pasta dinner explains the evening-mineral piece most people miss.
Frequently asked questions
Is 1,000 mg the same as 1 gram?
Yes. Exactly. 1,000 mg = 1 g, and 1,000 mcg = 1 mg. No rounding, no asterisk. Any label figure can be converted to grams by dividing by 1,000.
Why do clinical studies report doses in grams instead of milligrams?
Because researchers dose a single ingredient at a level expected to produce a measurable outcome, and for whole-food ingredients like spirulina or fiber that level is typically gram-scale. Reporting "3,000 mg" instead of "3 g" would be technically identical and needlessly clumsy in a paper.
Does a long ingredient list mean a better supplement?
No — it usually means smaller amounts of each thing. The scoop weight is fixed, so more ingredients means less of each. That's arithmetic, not opinion. Pure Greens uses exactly 13 ingredients in an 11 g scoop for that reason.
What is "fairy dusting" on a supplement label?
Industry slang for including an ingredient at an amount far below what research used, purely so it can appear on the label. It's legal as long as the amount is accurate. Your defense is tip 4: check the studied dose, then check your label.
How much of my scoop should be listed on the label?
Add the listed milligram amounts and compare the total to the serving weight. A large unexplained gap means fillers, flavoring, anti-caking agents or excipients. Some gap is normal in any powder. A gap of 60–70% of the scoop deserves a question to the brand.
Do I need a subscription to buy Pure Greens?
No. Rebuilt sells Pure Greens as a one-time purchase — no lock-in, no cancellation maze. Subscribe if it suits your routine, or don't.
Can I just take more scoops to hit study doses?
Don't freelance that. Serving sizes exist because some ingredients — particularly fat-soluble vitamins and minerals — have upper intake levels you shouldn't stack past. Choose a formula dosed properly at one serving instead, and talk to your healthcare provider if you take medication or have a health condition.
Where can you get Pure Greens from Rebuilt?
Straight from the source. Pure Greens is available on the Rebuilt store, and you can browse the full lineup in our collections. Everything ships direct, the ingredient panel is published on the product page, and there's no subscription requirement to get the standard price.
Before you order — from Rebuilt or anyone else — do the three-step check: convert the milligrams to grams, add them against the scoop weight, and divide the scoop by the ingredient count. Thirteen ingredients, 11 g, Danish-developed, amounts on the page. That's what we'd want you to verify, and the advice holds even if you buy somewhere else.
Clean, natural, built to become a habit you keep. That's how you get to the best version of yourself — through work, not through a longer ingredient list.
Claims overview
- Spirulina — supports normal energy levels and helps support normal mental and physical stamina. Randomized controlled trial, PMID:26888417.
- Spirulina — supports exercise performance and antioxidant status during physical activity. Kalafati et al. (2010), PMID:19936191.
- Spirulina — supports normal sleep quality and stress resilience. Randomized controlled trial, PMID:34107141.
- Fermented foods — support microbiome diversity as part of a varied diet. Wastyk et al. (2021), Stanford, PMID:34256014.
- Dietary intake during GLP-1 treatment — general nutrition context only, not a product claim. Mozaffarian et al. (2025).
- GLP-1 gastrointestinal side effects and dietary intake — general context only, not a product claim. PMC9821052.
References
- Wastyk HC, et al. Gut-microbiota-targeted diets modulate human immune status. Cell. 2021;184(16):4137. PMID:34256014. (Stanford University)
- Kalafati M, et al. Ergogenic and antioxidant effects of spirulina supplementation in humans. Medicine & Science in Sports & Exercise. 2010. PMID:19936191.
- Randomized controlled trial on spirulina supplementation and mental and physical fatigue. PMID:26888417.
- Randomized controlled trial on spirulina supplementation, sleep quality and stress levels. PMID:34107141.
- Review of GLP-1 receptor agonist side effects including constipation and bloating, and the role of dietary supplements. PMC9821052.
- Mozaffarian D, et al. Nutrition during GLP-1 treatment. American Journal of Clinical Nutrition. 2025;122:344.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
