7-OH powder is a concentrated powder in which 7-hydroxymitragynine — a minor alkaloid of the kratom leaf — is the labeled active compound. Unlike tablets, which state a fixed milligram content per piece, powder is sold by weight (grams), and its label states concentration: either a purity percentage by weight (% w/w) or milligrams of alkaloid per gram of powder (mg/g). The two notations describe the same thing, and converting between them is a one-step calculation covered on this page.

How do I convert a purity percentage to mg per gram?

Multiply the percentage by 10. A gram is 1,000 mg, so a powder that is 92.8% 7-OH by weight contains 92.8% of 1,000 mg = 928 mg of 7-OH per gram. In reverse, divide mg/g by 10: a COA reporting 612 mg/g is equivalent to 61.2% w/w. The two notations are interchangeable — vendors and labs just pick one or the other.

Is a higher purity percentage always the better buy?

Not on a per-milligram basis. Purity tells you concentration, not unit cost. Divide the price by the total milligrams in the jar (grams × mg/g) and compare that number. In our July 2026 worked examples, a 20 g jar at 612 mg/g listed for $749 works out to about 6.1¢ per mg, while a 20 g jar at 821 mg/g listed for $899 works out to about 5.5¢ per mg — the higher sticker price was the cheaper milligram. The math flips depending on the specific prices, which is exactly why you run it every time.

Does the mg/g figure on a powder always refer to 7-OH?

No — and this is one of the most common comparison mistakes. The mg/g figure refers to whatever alkaloid the lab quantified, which the COA names. Some powders sold alongside 7-OH products are mitragynine powders (for example, a 715 mg/g mitragynine powder is 71.5% mitragynine and is not a 7-OH product at all), and others are blends where the headline number is total alkaloids. Cost-per-mg comparisons are only valid within the same compound.

How do I verify the mg/g or purity number on a 7-OH powder?

Ask for the batch-matched certificate of analysis and check it yourself: the lab should be named and independently accredited (ISO/IEC 17025 is the standard to look for), the batch number on the COA should match the jar in hand, the report should be dated, and the potency line should state the compound and the mg/g figure the label claims. A purity number without a matching COA is a marketing claim, not a measurement. Our ISO 17025 guide and COA-reading guide walk through the checks in about five minutes.

// Learn · Consumer literacy

7-OH Powder Explained: Purity Percentages, mg per Gram, and How to Compare

Published: July 24, 2026 · all example prices and lab figures pulled from live listings on that date

The one conversion to remember

7-OH powder labels state concentration two ways — a purity percentage by weight (% w/w) or milligrams per gram — and they are the same number in different clothes. A gram is 1,000 mg, so % w/w × 10 = mg/g: a 92.8% powder carries 928 mg of 7-OH per gram, and a COA reporting 612 mg/g is a 61.2% powder. Everything else on this page — jar totals, cost per milligram, the comparison traps — is built on that one conversion.

Tablets tell you their milligrams on the box. Powder makes you do arithmetic: it is sold by weight, its strength is stated as a concentration, and two jars with identical sticker prices can differ enormously in what they actually contain. This guide walks the math with real, checkable July 2026 examples — so you can read any powder label, from any vendor, and know exactly what you are comparing.

What 7-OH powder is

7-hydroxymitragynine (7-OH) is a minor alkaloid of the kratom leaf; concentrated 7-OH products isolate it far above the trace levels found in raw leaf (our plain-English primer covers the chemistry). Powder is the least processed retail format: no binders, flavors, or per-piece pressing — just the concentrated material itself, sold in gram weights from 1 g jars to 100 g bulk. That simplicity is why powder is usually the cheapest format per milligram, and also why the label puts more work on the buyer. A tablet says "30 mg" and is done. A powder says "928 mg/g" or "92.8%" and leaves the multiplication to you.

The two numbers on every label

Every honest powder listing states concentration in one of two notations, and both trace back to the same source: the potency line of a lab's certificate of analysis.

Purity percent (% w/w) — "weight for weight." A 82.1% w/w powder means that of every 100 mg of powder in the jar, 82.1 mg is the named alkaloid and the remainder is other alkaloids, plant material, and residuals. This is the notation labs favor.

Milligrams per gram (mg/g) — the same fact expressed per gram of powder. Since 1 g = 1,000 mg, the conversion is a single step in either direction:

mg/g = % w/w × 10 · % w/w = mg/g ÷ 10

Worked both ways: a powder whose COA reports 821 mg/g is 821 ÷ 10 = 82.1% w/w. A powder marketed as "60%+ purity" whose COA reports 612 mg/g is 61.2% w/w — the COA number is the precise one, the marketing round-down is the loose one. When a label and a COA disagree by more than rounding, trust the COA; when there is no COA, there is no number.

Affiliation disclosure, before the examples: Wholesome Fraction is operated by the same company as Favor'd Alkz and 7ohBlack (TMFRA LLC) — this is not an independent review of those brands. We use their powders as worked examples below because they publish exactly the numbers this guide teaches — a mg/g figure on every listing and batch COAs behind it — which makes every calculation on this page checkable against a live source. That is a documentation convenience, not an endorsement or a recommendation to buy. The same math applies identically to any vendor's powder.

Same fact, two notations: real examples

Here are five powders listed live on July 24, 2026, with the published mg/g figure and its percentage equivalent. Note the fourth row carefully — it is there on purpose:

Powder (Favor'd Alkz / 7ohBlack — affiliated)	Published figure	Equivalent	Quantified compound
Moon Dust	966 mg/g	96.6% w/w	7-hydroxymitragynine
Saffron Soul	928 mg/g	92.8% w/w	7-hydroxymitragynine
OG 7ohBlack Powder	821 mg/g	82.1% w/w	7-hydroxymitragynine
White Velvet Powder	715 mg/g	71.5% w/w	Mitragynine — not 7-OH (see the traps section)
Amber Moon Powder	612 mg/g	61.2% w/w	7-hydroxymitragynine

From concentration to jar totals

The mg/g figure only becomes useful when you multiply it by the jar size: total mg = grams × mg/g. A 5 g jar at 821 mg/g contains 5 × 821 = 4,105 mg of 7-OH. A 3 g jar at 928 mg/g contains 2,784 mg. A 20 g jar at 612 mg/g contains 12,240 mg. Two jars of identical gram weight are not comparable until you have done this multiplication — a 10 g jar at 612 mg/g (6,120 mg) and a 10 g jar at 928 mg/g (9,280 mg) differ by more than 50% in actual content.

Cost per milligram: the only honest comparison

Sticker price compares nothing. Price per gram compares packaging. The number that lets you compare a 1 g jar against a 100 g bag, or one brand against another, is price ÷ total mg. One fully worked example: a 1 g jar at 928 mg/g listed at $65.00 → $65.00 ÷ 928 mg ≈ 7.0¢ per mg. Here is the same arithmetic across the affiliated example lineup at July 24, 2026 list prices:

Product (published mg/g)	Size and list price	Total alkaloid	Cost per mg
Saffron Soul (928 mg/g)	1 g — $65.00	928 mg	≈ 7.0¢ / mg
Saffron Soul (928 mg/g)	10 g — $525.00	9,280 mg	≈ 5.7¢ / mg
Saffron Soul (928 mg/g)	20 g — $950.00	18,560 mg	≈ 5.1¢ / mg
OG 7ohBlack (821 mg/g)	5 g — $269.00	4,105 mg	≈ 6.6¢ / mg
OG 7ohBlack (821 mg/g)	20 g — $899.00	16,420 mg	≈ 5.5¢ / mg
Amber Moon (612 mg/g)	5 g — $229.00	3,060 mg	≈ 7.5¢ / mg
Amber Moon (612 mg/g)	20 g — $749.00	12,240 mg	≈ 6.1¢ / mg
Saffron Soul bulk (928 mg/g)	100 g — $3,850.00	92,800 mg	≈ 4.1¢ / mg
OG 7ohBlack bulk (821 mg/g)	100 g — $3,650.00	82,100 mg	≈ 4.4¢ / mg
Amber Moon bulk (612 mg/g)	100 g — $3,050.00	61,200 mg	≈ 5.0¢ / mg

Two patterns worth noticing, because they generalize across the whole market. First, size is the dominant lever: within a single product, moving from the smallest jar to the largest cut the per-mg cost by roughly a third to two-fifths (7.0¢ → 4.1¢, a 41% drop, on the 928 mg/g line). Second — and this is the finding most buyers miss — the cheaper sticker was the more expensive milligram: at 20 g, the $749 jar (612 mg/g) works out to ≈6.1¢/mg while the $899 jar (821 mg/g) works out to ≈5.5¢/mg. Whether that flip happens depends entirely on the specific prices on the specific day, which is why the division is worth thirty seconds every time. For cross-format context: a 100-count bottle of 80 mg tablets listed at $520.00 on the same date carries 8,000 mg — ≈6.5¢/mg — inside the powder range, at the cost of the format differences our formats guide covers. The full cross-format method lives in our price-per-mg guide.

The three comparison traps

Trap 1 — mg/g of which compound? The mg/g figure quantifies whatever alkaloid the lab measured, and it is not always 7-OH. The 715 mg/g powder in our notation table is a mitragynine powder — a different kratom alkaloid entirely — and at July 24 list prices it works out to roughly 1.7¢ per mg of mitragynine. Set next to a 7-OH powder at 5–7¢/mg it looks like a bargain, but that is a category error, not a discount: cost-per-mg comparisons only mean anything within the same compound. Read the COA's analyte line, not just the big number. (Our names glossary untangles the adjacent compounds.)

Trap 2 — purity as a quality score. A higher percentage means more concentration per gram, full stop. It does not mean better manufacturing, cleaner residual solvents, or a more trustworthy vendor — those live on the rest of the COA, not the potency line. And as the table above shows, it does not even reliably mean a better price per milligram.

Trap 3 — numbers without a COA. A purity claim you cannot trace to a dated, batch-matched certificate from a named lab is marketing copy. The verification routine is short: match the batch number on the jar to the COA, confirm the lab's ISO/IEC 17025 accreditation, check the report date, and confirm the potency line matches the label. Our ISO 17025 guide and COA-reading guide cover it in five minutes.

Where to check the example numbers

Every figure in this guide can be verified at the source, which is the point of using documented products as examples. The retail listings and batch certificates for the Favor'd Alkz powders are published at favordalkz.com/pages/lab-results; 7ohBlack — the wholesale and B2B arm of the same company, with retail fulfillment at favordalkz.com — maintains its COA hub at 7ohblack.com/pages/coa. Both are affiliated with this site, per the disclosure above. Apply the identical checks to any unaffiliated vendor: if a powder's mg/g figure, batch COA, and accredited lab name are not published or provided on request, the label number is unverifiable — whatever it says.

The regulatory footnote

Concentrated 7-OH powder sits squarely inside the DEA's July 6, 2026 notice of intent (Federal Register document 2026-13580, covering 7-hydroxymitragynine above 0.05% concentration or 1.00 mg per article), with final orders possible August 5, 2026 at the earliest — and several states restrict or ban these products already. This page teaches label math, not legal status; check the live ban status tracker and the state-law guide before assuming anything here about availability.

Frequently asked questions

What is 7-OH powder?: 7-OH powder is a concentrated powder in which 7-hydroxymitragynine — a minor alkaloid of the kratom leaf — is the labeled active compound. Unlike tablets, which state a fixed milligram content per piece, powder is sold by weight (grams), and its label states concentration: either a purity percentage by weight (% w/w) or milligrams of alkaloid per gram of powder (mg/g). The two notations describe the same thing, and converting between them is a one-step calculation covered on this page.
How do I convert a purity percentage to mg per gram?: Multiply the percentage by 10. A gram is 1,000 mg, so a powder that is 92.8% 7-OH by weight contains 92.8% of 1,000 mg = 928 mg of 7-OH per gram. In reverse, divide mg/g by 10: a COA reporting 612 mg/g is equivalent to 61.2% w/w. The two notations are interchangeable — vendors and labs just pick one or the other.
Is a higher purity percentage always the better buy?: Not on a per-milligram basis. Purity tells you concentration, not unit cost. Divide the price by the total milligrams in the jar (grams × mg/g) and compare that number. In our July 2026 worked examples, a 20 g jar at 612 mg/g listed for $749 works out to about 6.1¢ per mg, while a 20 g jar at 821 mg/g listed for $899 works out to about 5.5¢ per mg — the higher sticker price was the cheaper milligram. The math flips depending on the specific prices, which is exactly why you run it every time.
Does the mg/g figure on a powder always refer to 7-OH?: No — and this is one of the most common comparison mistakes. The mg/g figure refers to whatever alkaloid the lab quantified, which the COA names. Some powders sold alongside 7-OH products are mitragynine powders (for example, a 715 mg/g mitragynine powder is 71.5% mitragynine and is not a 7-OH product at all), and others are blends where the headline number is total alkaloids. Cost-per-mg comparisons are only valid within the same compound.
How do I verify the mg/g or purity number on a 7-OH powder?: Ask for the batch-matched certificate of analysis and check it yourself: the lab should be named and independently accredited (ISO/IEC 17025 is the standard to look for), the batch number on the COA should match the jar in hand, the report should be dated, and the potency line should state the compound and the mg/g figure the label claims. A purity number without a matching COA is a marketing claim, not a measurement. Our ISO 17025 guide and COA-reading guide walk through the checks in about five minutes.
Is 7-OH powder legal?: As of July 24, 2026, 7-OH is not federally scheduled, but the DEA published notices of intent in the Federal Register on July 6, 2026 (including document 2026-13580, covering 7-hydroxymitragynine above 0.05% concentration or 1.00 mg per article) with final orders possible August 5, 2026 at the earliest — concentrated 7-OH powder sits well above those thresholds. State law adds its own layer of bans and restrictions. Check our live ban status tracker and state-law guide for current status before assuming anything on a dated page.

Disclosure: Wholesome Fraction is operated by the same company as Favor'd Alkz and 7ohBlack (TMFRA LLC). The product examples on this page are affiliated brands and this is not an independent review of them; they are used because their published mg/g figures and batch COAs make the arithmetic checkable. Prices and lab figures reflect live listings as of July 24, 2026 and will change. Questions or corrections: hello@wholesomefraction.com.

For adults 21+ only. This page is an educational explainer of product labeling and unit-cost arithmetic. It is not a recommendation to purchase or use any product, and it makes no claims about any product's effects, safety, or quality.

These products have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Federal and state legal status can change quickly — verify current law before purchasing. Primary documents: Federal Register 2026-13580 and 2026-13581 at federalregister.gov.