Choose your size

Two starters cost $12.00 more than one 60-capsule bottle. Start here if you're not sure yet; start there if you are.

Nutriop Longevity®·NAD⁺-Vorläufer

NMN NAD+ Booster

Einfach. Kraftvoll. Bewährt.

Recharge auf Zellebene. Spürbar im ganzen Körper.

Hol dir die Energie zurück, die du vor 10 Jahren hattest.
Workouts fühlen sich wieder machbar an.
Energie + Fokus + Regeneration in einer täglichen Dosis.
 

Nutritional Information

Nutriop® PURE-NMN™ 500mg

NAD+ WIEDERHERSTELLUNG

Gezielte Signalwege & Energieumwandlung

PHASE 1: NMN-AUFNAHME
NMN 500mg NAD+ Aktiviert ATP Energie SIRT Schutz NAM Recycling
Schritt 1
NMN→NAD+
Schritt 2
Energie/Sirtuine
Schritt 3
Recycling-Zyklus
NAD+ Wiederherstellungsgrad
98
/100
Optimale zelluläre Energieproduktion
MAXIMALE STÄRKE
Nährstoffinfo
Portionsgröße
1 Kapsel
Portionen
60
Nettogewicht
30g
Wirkstoff
Menge
% NRV
β-Nicotinamid-Mononukleotid
99,9 % Reinheit (Pharma-Qualität)
500mg
†
WEITERE ZUTATEN:
Pullulan-Kapseln (100 % pflanzlich).
VEGAN GENTECHNIKFREI GMP-ZERTIFIZIERT LABORGEPRÜFT
† Täglicher Bedarf (NRV) nicht festgelegt • Kühl und trocken lagern
Reinheit
99,9%
 

Benefits

Deine nächsten 30 Tage mit Pure-NMN

Vom Durchhängen zum Durchstarten

0
NAD+ Moleküle/Sek
0
Forschungsstudien
0%
Reinheitsgrad

Der Unterschied, den 500 mg täglich machen:

NAD+ Produktions-Boost 0%
Anhaltende Energielevel 0%
Reduktion der Erholungszeit 0%
Tag 1 Woche 1 Woche 2 Woche 3-4 Monat 2+
1
Tage 1-7: Das Fundament
Deine Zellen erkennen das NMN sofort. Die NAD+ Produktion kommt wieder in Schwung. Du fühlst es vielleicht noch nicht, aber die zelluläre Maschinerie läuft sich warm. Einige Early Adopters berichten ab Nacht fünf von besserem Schlaf.
2
Woche 2: Der Wandel
Hier fangen Leute an, uns zu schreiben. "Ist das normal?" Ja, um 15 Uhr wach zu sein ist normal – du hast es nur vergessen. Energie wird beständig, nicht sprunghaft. Deine Workouts fühlen sich wieder... machbar an.
3
Woche 3-4: Die neue Normalität
• Morgendliche Benommenheit? Weg.
• Nachmittagstief? Welches Nachmittagstief?
• Brain Fog? Gelichtet wie der Nebel im Oktober.
• Erholungszeit? Bei den meisten Nutzern um 30-40% verkürzt.
∞
Monat 2 und darüber hinaus: Der Zinseszins-Effekt
Hier passiert die eigentliche Magie. Anhaltende NAD+ Unterstützung bedeutet:
• Haut, die verdächtig erfrischt aussieht (Hallo, Zellerneuerung)
• Ausdauer, die dich (und deinen Fitness-Tracker) überrascht
• Geistige Schärfe, bei der Kollegen fragen, was sich geändert hat
• Dieses allgemeine Gefühl von "Ich hab das im Griff", das zurückkehrt

Was unser NMN anders macht:

💊
Wirksamkeit, die zählt:
500 mg sind kein Zufall – es ist die Dosis, die in Humanstudien Ergebnisse zeigt.
🔬
Reinheit, die du prüfen kannst:
99 % reines β-NMN, Laborberichte verfügbar
🇨🇭
Schweizer Präzision:
Weil Beständigkeit zählt, wenn es um deine Gesundheit geht
📦
Vorrat für 60 Tage:
Zwei Monate Transformation in jeder Flasche
👨
James K.
Verifizierter Käufer • 52 Jahre
★★★★★

"Ich habe mit 52 angefangen, NMN zu nehmen. In der dritten Woche fragte meine Frau, ob ich eine Affäre hätte, weil ich so viel Energie hatte. Nein, nur zelluläre Reparatur."

Das Fazit:

Deine Zellen sind auf Reserve gelaufen. Pure-NMN ist der Weg, den Tank wieder aufzufüllen – nicht mit kurzfristigen Lösungen, sondern mit dem echten Treibstoff, für den dein Körper gemacht ist.

 
 

Third-Party Certifications

GEPRÜFTE EXZELLENZ

Unabhängige Labor-Zertifikate

Geprüft
99%
Reinheit

Unabhängige Labor-Verifizierung

Echtzeit-Verifizierungsstatus LIVE
0
Tests
0%
Ø Reinheit
0
Zertifiziert
A+
Qualität
🔬
Laborgeprüft
ISO-Zertifiziert
✓
Geprüfte Reinheit
99,9% Reinheit
📋
COA Verfügbar
Vollständige Berichte
β-NMN Reinheitsgrad 99,9%
🔬
Testmethode
1H-NMR
📅
Testdatum
Mrz 2026
Zertifiziert durch
Limbach Analytics GmbH
DAkkS / ISO/IEC 17025:2018 Akkreditiert
🏆
Umfassende Testergebnisse
NMN Reinheit (1H-NMR) 99,9% ± 2,8%
Schwermetalle (Pb, Cd, As, Hg) Unter Nachweisgrenze
Nicotinamid-Spuren < 0,1%
Alle Details anzeigen
★ 4.7 · 33 Judge.me reviews on this size · 127 across both sizes|Swiss-formulated|Third-Party Tested|90-Day Guarantee|Tracked priority shipping

Start with thirty. Same capsule, same certificate.

Everything in this bottle is the 60-capsule bottle, halved. 500mg of 99.9% β-NMN per capsule, pre-measured, two a day with water. Thirty capsules is fifteen days at the full protocol — enough to know whether capsules fit your routine, before you commit to a month.

  • 500mg β-NMN per capsule — 99.9% ± 2.8% by ¹H-NMR, DAkkS-accredited laboratory
  • Two capsules a day, 1,000mg. Thirty capsules is fifteen days; one a day is a month
  • One ingredient in a vegan pullulan capsule — no fillers, no flow agents, no flavouring
  • Tested for lead, cadmium, arsenic and mercury — all below the limit of quantification

Made for people who'd rather try a bottle than buy a month. If you already know you want the full protocol, the 60-capsule bottle costs less per capsule — it's one click up.

Nutriop Longevity® Pure-NMN Nicotinamid-Mononukleotid Extreme Potenz 500 mg Kapseln (x30) – 15 Gramm

Is the starter for you?

This bottle is for you if
✓ It's your first NMN, and you'd rather finish a bottle than buy a month on faith.
✓ You want to settle the format — a pre-measured capsule — before committing to the 60.
✓ You take one capsule a day and like a fresh bottle every month.
✓ You want a bottle that goes in a bag: 15g, no scoop, nothing that minds travel.

Probably not, if
– You already know you want the full protocol. The 60-capsule bottle costs less per capsule — start there.
– You want to judge the effect from one bottle. Fifteen days isn't enough, and we'd rather say so now. The guarantee runs 90 days for exactly that reason.
– You want Subscribe & Save. It lives on the 60-capsule bottle, one delivery every 30 days.
– You need delivery to Switzerland. Capsules aren't currently available there.

Not for children, or during pregnancy or nursing, or alongside medication without medical advice — any size.

Choose your size

Thirty or sixty? The honest way to choose.

Both bottles hold the same capsule — 500mg of the same β-NMN, the same laboratory, the same certificate. What changes is how long a bottle lasts, what it costs per capsule, and how much you're committing to before you know whether it suits you.

30 capsules (this page)60 capsules
What's inside 30 × 500mg β-NMN · 15g 60 × 500mg β-NMN · 30g
Label protocol (1 capsule × 2 daily) 15 days 30 days
At one capsule a day 30 days 60 days
Price per bottle $46.00 $80.00
Price per capsule $1.53 $1.33
Best for A first bottle. Testing the format and the routine. A monthly bottle at one a day. The full protocol. Repeat orders. Subscribe & Save.

The maths, plainly:

Two starters cost $12.00 more than one 60-capsule bottle, for the same sixty capsules. So the starter isn't the cheaper way to buy NMN — it's the cheaper way to find out. What $46.00 buys: a bottle you can finish before deciding, the same certificate as the full size, and nothing left on the shelf if capsules turn out not to be your format.

Choose 30 if this is your first NMN, you want to settle the format and routine before buying a month, or you take one capsule a day and like a fresh bottle monthly. Choose 60 if you already know you want the full protocol — it's the better price per capsule and the only size on Subscribe & Save. Prefer powder? Same NMN, taken under the tongue, in a 15g or 30g pouch — the comparison is on the powder page.

Why NMN

What NMN does once it's in you

NAD+ is a coenzyme in every living cell. Cells use it to turn food into usable energy, to run the enzymes that maintain DNA, and to switch on the sirtuins — a family of proteins involved in how cells handle stress. Levels tend to fall with age, at a pace that varies from tissue to tissue and person to person.

NMNWhat you take
→
NAD+What your cells use
→
Energy · repair · cell signallingWhere it goes

NMN sits one step upstream. An enzyme called NMNAT turns it into NAD+, a conversion that has been understood for decades. Taking NMN gives that step more to work with.

Here is the honest state of the evidence. Established: the pathway, and that oral NMN raises blood NAD+ in human trials. Still being studied: which downstream effects that produces in healthy adults, and at what dose. So we won't tell you what fifteen days will feel like. We'll tell you exactly what's in the capsule — and give you 90 days to decide, whichever size you start with.

Why Nutriop

Not all NMN is the same. Here's what you can check.

There's a lot of NMN for sale, and most of it costs less than this. Below is what the difference buys — each point with the document or the label behind it. A smaller bottle doesn't change any of it.

99.9% β-NMN. The laboratory's number, not ours.
The current batch was analysed at Limbach Analytics in Mainz — accredited by DAkkS to ISO/IEC 17025:2018 — by proton NMR with an internal standard, a method that identifies the molecule and measures it in one pass. Result: 99.9% ± 2.8%. The certificate is on this page, report number and all. It's the same analysis that covers the 60-capsule bottle: one capsule, one certificate, two sizes.
500mg per capsule. Whole numbers.
Two capsules make the 1,000mg daily protocol on the label. No half-capsules, no counting four of something smaller, no scoop. The dose is decided before you open the bottle — and it's the same every time. Thirty capsules is fifteen of those days.
The β form, because that's what your cells convert.
NMN comes in two isomers. Only β-NMN is what NMNAT turns into NAD+. Ours is β-NMN, and the NMR spectrum confirms it — the analysis identifies the molecule, not just how much of it there is.
One ingredient, in a pullulan capsule.
Nicotinamide mononucleotide. That's the entire ingredient list. The shell is pullulan, a plant-derived capsule that's vegan and free from lactose, yeast, soy, sugar, shellfish and gluten. Look at the label; there's nothing else to read.
Tested for what shouldn't be there.
Purity tells you how much NMN is present. The same certificate reports lead, cadmium, arsenic and mercury, each below the laboratory's limit of quantification. Cheaper NMN is rarely tested for either, and when it is, the certificate is rarely shown. Ours is one click down.
SpecDetail
Active ingredientβ-Nicotinamide mononucleotide (β-NMN)
Per capsule500mg
Serving2 capsules (1,000mg) · 15 servings per bottle
Capsules · net30 · 15g
CapsulePullulan, plant-derived — vegan
Other ingredientsNone
Purity99.9% ± 2.8% — ¹H-NMR, Limbach Analytics, 27 March 2026
Heavy metalsPb, Cd, As, Hg — below limit of quantification
Origin · storageSwiss-formulated · cool, dry place
Verified purity

Tested. Verified. Published.

99.9% ± 2.8%. That's the current batch, report L-26-02161, dated 27 March 2026, from Limbach Analytics in Mainz — a laboratory accredited by DAkkS to DIN EN ISO/IEC 17025:2018, registration D-PL-20185-01-01. The method is proton NMR with an internal standard: it identifies the molecule and measures it in one pass. The same report screens for four heavy metals. Smaller bottle, same analysis.

TestResult
NMN purity — ¹H-NMR + internal standard 99.9% ± 2.8%
Lead < 0.05 mg/kg
Cadmium < 0.005 mg/kg
Arsenic < 0.01 mg/kg
Mercury < 0.01 mg/kg
Laboratory Limbach Analytics GmbH / Arotop Laboratorien Mainz
Accreditation DAkkS · DIN EN ISO/IEC 17025:2018 · D-PL-20185-01-01
Report · date L-26-02161 · 27 March 2026

Purity tells you how much NMN you're getting. The metals panel tells you what you're not. Both sit on one certificate, published as issued. We don't excerpt the parts we like.

📄 VIEW THE CERTIFICATE OF ANALYSIS
Daily protocol

Two capsules. Two moments. Fifteen days.

Pure NMN daily protocol: one capsule before breakfast, one before dinner, 1,000mg a day
2
capsules a day — 1,000mg NMN
One before breakfast, one before dinner, each with water on an empty stomach.
One ingredient · vegan pullulan capsule · no fillers

That's the whole routine on the label. One before breakfast, one before dinner. No loading phase, no cycling, nothing to measure. Thirty capsules is fifteen days.

Easing in at one a day is fine — it's still 500mg of NMN, and the bottle lasts a month that way. We suggest about 30 minutes before a meal, for a routine you'll keep rather than a rule the science lays down. Taken with food, it's still your NMN. Keep the bottle somewhere cool and dry; no refrigeration needed.

What to expect

What fifteen days can and can't tell you.

NMN works at a cellular level, and the people who take it don't report one pattern. A starter bottle settles some questions and not others. Here's which.

Settled by day 15
The routine
Whether two capsules with water, morning and evening, is something you'll actually keep up. Most people know by the end of the first week.
Settled by day 15
The format
Whether you prefer a pre-measured capsule to a scoop under the tongue. If you don't, the powder exists — and the 90 days cover you either way.
Not settled by day 15
The effect
Some customers describe a change in how their days feel within a few weeks; others notice nothing distinct and take it for the long-term reasoning. Fifteen days is too short to call it either way — which is why the guarantee runs 90, and why the 60-capsule bottle is the next step, not a second starter.

A pattern we hear often: people say they noticed what NMN was doing only after they stopped for a few weeks. It's an anecdote, not a study — but a useful one to know before you judge a first bottle.

Verified reviews

What verified buyers actually said

33 Judge.me reviews on this size and 94 on the 60-capsule bottle, all verified purchases, all in the customers' own words — including the ones who say it's too early to tell.

★★★★★

Absolutely excellent product, would highly recommend it to anyone.

Paul F. · Loox · Verified buyer
★★★★★

I only use the product for 14 days, I expect results in half a year.

Radomir Brynda · Judge.me · Verified buyer
Fourteen days is one starter bottle. That's the right expectation, and we'd rather you had it before you bought.
★★★★☆

I realised improved shorter recovery time.

Martin Caflisch · Judge.me · Verified buyer
★★★★★

I have certainly seen a difference since taking this product and I seem to have more energy

Gillian Douglas · Judge.me · Verified buyer
★★★★★

Sehr gutes Produkt von hoher Qualität.

Dieter · Judge.me · Verified buyer
Translation: "Very good product, of high quality."
★★★★★

I don't struggle with energy levels so I don't think it has impacted me in that sense although I think I get a bit of placebo. I mainly take it for the anti ageing

Gleb Popov · Judge.me · Verified buyer
We keep this one up. Not everyone notices a change; this customer says so, and bought anyway for his own reasons.
Build your protocol

NMN is the foundation. Add to it when you're ready.

Finish the starter first. When NMN has earned its place, one of these is a sensible second step, depending on what you're working on. None is required.

Nutriop Pure NMN 500mg capsules, 30-capsule starter bottle, 15g net
Nutriop® COGNIPRIME® – Premium-Nootropikum &amp; Kognitives Langlebigkeits-Paket (180 Kapseln)
Focus and mental performance
Pure NMN + COGNIPRIME®
COGNIPRIME's 13 nootropic ingredients support cognitive function; NMN supports the energy metabolism behind it. Stimulant-free on both sides.
PAIR WITH COGNIPRIME →
Nutriop Pure NMN 500mg capsules, 30-capsule starter bottle, 15g net
Nutriop® Resveratrol PLUS – Fortschrittlicher Senolytikum- &amp; Polyphenol-Stack (60 Kapseln)
Polyphenols alongside NAD+
Pure NMN + Resveratrol PLUS
Resveratrol is studied as a sirtuin activator, and sirtuins use NAD+. Five polyphenols in one capsule, next to the precursor.
PAIR WITH RESVERATROL PLUS →
Nutriop Pure NMN 500mg capsules, 30-capsule starter bottle, 15g net
Nutriop® Pure Spermidine 10 mg – Fortschrittlicher Autophagie-Aktivator (60 Kapseln)
Cellular renewal
Pure NMN + Pure Spermidine
Spermidine supports autophagy, the cell's recycling process; NMN supports the energy side. Contains wheat and gluten (natural wheat germ extract).
PAIR WITH PURE SPERMIDINE →
Nutriop Pure NMN 500mg capsules, 30-capsule starter bottle, 15g net
Nutriop® Bio-Enhanced Berberin-HCL 865 mg – AMPK-Aktivator aus zwei Quellen (90 Kapseln)
Metabolic support
Pure NMN + Berberine HCL
Berberine supports AMPK activation; NMN supports NAD+-dependent energy metabolism. Complementary, not overlapping.
PAIR WITH BERBERINE HCL →
Nutriop Pure NMN 500mg capsules, 30-capsule starter bottle, 15g net
Nutriop® Life ULTRA – Fortschrittliches Multi-Pathway-Langlebigkeitspräparat (1115 mg)
One capsule, broad coverage
Pure NMN + Life ULTRA
9 active ingredients across 3 longevity pathways as the daily base, with Pure NMN as the single-ingredient addition.
MAXIMIZE YOUR PROTOCOL →
Honest Answers

Everything you need to know before you start.

How long does the 30-capsule bottle last?

+

Fifteen days at the label protocol — one capsule before breakfast, one before dinner, 1,000mg a day. At one capsule a day, a month.

Is fifteen days enough to notice anything?

+

Usually not, and we'd rather say so here than in a refund email. Fifteen days settles whether the routine and the format suit you. The effect is a longer question: some people describe a change within a few weeks, others feel nothing distinct. That's what the 90-day guarantee is for.

Can I take one capsule a day?

+

Yes — that's 500mg, and the bottle lasts a month. The label protocol is two; some people start with one to see how they get on. There's no universally agreed dose yet; 1,000mg is where we've set the protocol, not a requirement.

Should I just buy the 60?

+

If you already know you want the full protocol, yes. It costs less per capsule and it's the size on Subscribe & Save. Two starters cost $12.00 more than one 60-capsule bottle. The starter is for finding out, not for repeating.

Is this the same NMN as the 60-capsule bottle?

+

Identical. Same β-NMN, same 500mg capsule, same pullulan shell, same laboratory and the same certificate. The only differences are the number of capsules and the price per capsule.

What is NMN, and what does "β-NMN" mean?

+

Nicotinamide mononucleotide is the molecule your cells convert into NAD+, one enzyme step away. It exists as two isomers; the β form is the one that enzyme uses. Ours is β-NMN, confirmed by NMR.

How do I know it's really 99.9%?

+

Because the laboratory says so, not us: Limbach Analytics, DAkkS-accredited, by ¹H-NMR — 99.9% ± 2.8%, report L-26-02161, 27 March 2026. The whole certificate is on this page, heavy-metals panel included.

Capsules or sublingual powder?

+

Same NMN, same purity. Capsules if you want the dose measured for you, no taste and a travel-proof routine. Powder if you'd rather take it under the tongue or set your own amount. The powder also comes in a 15g starter pouch.

With food or on an empty stomach?

+

The label says empty stomach, with water. We suggest about 30 minutes before a meal, for a routine you'll keep. Taken with food, it's still your NMN.

Can I combine it with other supplements or medication?

+

With other supplements, generally yes — the pairings above are the ones our customers use most. If you take prescription medication, or you're pregnant or nursing, ask your doctor first.

Does the 90-day guarantee cover the starter?

+

Any size, any reason. Email us within 90 days of purchase for a full refund. No return needed — keep the bottle. We'll ask what you experienced because it helps us, but it isn't a condition.

Where do you ship, and how fast?

+

EU orders leave our Dutch fulfilment centre within 1–2 days and arrive in 4–6 business days (2–3 to Germany, Belgium and the Netherlands).Tracked priority shipping.Capsules aren't currently available for delivery to Switzerland.

Nutriop Longevity® Pure-NMN Nicotinamid-Mononukleotid Extreme Potenz 500 mg Kapseln (x30) – 15 Gramm
Choose your size

Start Pure NMN at the size that suits you

First bottle
Pure NMN 500mg — 30 Capsules
15-Day Starter · One-time purchase
$46.00 single bottle
30 capsules · 15 days at the label protocol, a month at one a day
Tracked priority shipping
90 days to decide, no return needed
Best value per capsule
Pure NMN 500mg, 60-capsule bottle
Pure NMN 500mg — 60 Capsules
30-Day Supply
$80.00 $1.33/capsule
Ready to make it a habit? Subscribe & Save is on the 60-capsule bottle — one delivery every 30 days matches the protocol, 25% off every delivery, pause or cancel anytime.
Already sure? Get the 60-capsule bottle →

Which size? The 30-capsule bottle is a 15-day starter at the same two-a-day routine — enough to settle the format, not enough to judge the effect. The 60-capsule bottle is the full 30-day protocol and the better price per capsule.

90-Day Guarantee

Try the starter for up to three months. If NMN hasn't earned its place in your routine, email us and we'll refund you in full. No return needed — keep the bottle. We'll ask what you experienced because it helps us, but it isn't a condition.

Start small. Same capsule.

The same 99.9% β-NMN, laboratory and certificate as the 60-capsule bottle — halved, so your first decision is a small one. Independently tested, certificate published, 33 verified reviews on this size, and 90 days to decide.

Swiss-formulated · Third-party tested · 90-day guarantee, no return needed

Food supplements are not a substitute for a varied and balanced diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of children. Consult a healthcare professional before use if pregnant, nursing, or taking medication.

Customer Reviews

Overall rating: 4.6 / 5 from 265 reviews.

Customer photo review of Nutriop® Pure NMN Sublingual Powder - Direct NAD+ Precursor (30g)

I have used pure NMN power about 3 times 1st week and same 2nd week. I need try and take daily regularly than I can judge better. The product is nicely packaged also quick delivery and I certainly feel good after taking it. Will carry on.

Nutriop® Pure NMN Sublingual Powder - Direct NAD+ Precursor (30g)

Customer video review of Nutriop Longevity® Pure-NMN Nicotinamide Mononucleotide Extreme Potency 500mg Capsules (x60) - 30 Grams

I’ve been taking the NMN supplement from Nutriop, and I feel a noticeable boost in energy and cognitive sharpness, especially when I take it in the morning on an empty stomach. While others around me have been feeling fatigued or falling ill, I’ve stayed healthy and energized. It’s been a great addition to my routine, and I highly recommend it for anyone looking to enhance their energy levels and mental clarity.

Nutriop Longevity® Pure-NMN Nicotinamide Mononucleotide Extreme Potency 500mg Capsules (x60) - 30 Grams

Customer video review of Bio-Enhanced Nutriop Longevity® Resveratrol with Pure Quercetin - 500mg Capsules (x45)

I’ve been taking resveratrol from Nutriop for about three weeks now, and I have to say I’m very satisfied. While illnesses are spreading among my friends, I continue to feel full of strength and energy. My immune system seems to be working exceptionally well, and I’ve stayed healthy throughout. I highly recommend it to anyone looking to boost their resilience and overall vitality.

Bio-Enhanced Nutriop Longevity® Resveratrol with Pure Quercetin - 500mg Capsules (x45)

Customer photo review of Pure-NMN Nicotinamide Mononucleotide Extreme Potency 500mg Capsules (x60) - 30 Grams

Im coming up to 61 and have trained most of my life but my energy levels and body clock seemed to have died off. I found I needed a strict diet and to eat less to maintain weight so, I decided to try NMN and alter my diet and err slightly more to protein and it seems to have made a big difference. My training level is coming back and I find I can eat all I want and still look good..... and it's not just the diet as I have tried the diet alone but that simply did not work, the NMN definitely makes a difference.

Pure-NMN Nicotinamide Mononucleotide Extreme Potency 500mg Capsules (x60) - 30 Grams