Nitric Boost Ultra Review: The Powder Format Is the Real Story (2026)
Nitric Boost Ultra is a once-daily scoop of powder built around L-citrulline, L-arginine and beet root — the three most-researched nitric oxide precursors in men's circulation supplements. The powder format is not a gimmick: it is the only practical way to deliver these amino acids at the gram-scale amounts the research actually used. Where it stumbles is the back half of the label, and the fact that no doses are published.
Daniel Rodriguez
Men's Health & Wellness Writer
Last updated: September 6, 2026
Disclosure: This review contains affiliate links. If you purchase through our links, we may earn a commission at no extra cost to you. Read our affiliate disclosure and editorial policy.
Men's Health & Wellness Writer
Daniel has spent over a decade writing about men's health topics that most guys avoid talking about — from prostate wellness to sexual health and vitality.
At a glance
Best for
- Men 40-65 who want circulation support at doses capsules cannot realistically deliver
- Anyone who has tried capsule-based nitric oxide formulas and felt nothing
- People who already drink a morning shake and will actually mix a scoop
- Readers who want the well-evidenced amino acids without a twenty-ingredient label
Not for
- Anyone taking nitrates for a heart condition — this can drop blood pressure dangerously without prescriber clearance
- Men on blood thinners or antiplatelet drugs without checking the ginkgo first
- Anyone who will not stick with a daily powder routine
- People buying it for the D-aspartic acid, which the randomised trials do not support
Nitric Boost Ultra price & where to buy
- Price: from $49 per bottle (single bottle $69) · Up to 29% OFF on the 6-jar bundle
- Guarantee: 60-day money-back guarantee
- Where to buy: only on the official Nitric Boost Ultra website — not sold in stores, on Amazon or Walmart.
Nitric Boost Ultra still worth it in 2026?
The right ingredients in the right format — with two entries that do not earn their place
"Mixed it into water first thing. Tastes like faintly sweet beet juice, which is exactly what you'd expect."
"Day one I got the niacin flush and thought something was wrong. It passed in twenty minutes and now I barely notice it."
"Six weeks in. I'm not going to write a paragraph about it on the internet, but yes, things are better than they were."
- L-citrulline DL-malate is the best-supported nitric oxide precursor available over the counter, and a powder can actually deliver it at research doses.
- A 2019 meta-analysis in The Journal of Sexual Medicine found arginine supplementation outperformed placebo for erectile function scores.
- Beet root brings dietary nitrate, with solid randomised evidence behind its vascular effects.
- 60-day money-back guarantee, no reason required, confirmed at the checkout itself.
Nitric oxide pathways rebuild over weeks. Four to eight weeks of daily use is the honest evaluation window — anyone promising a next-morning effect is selling you a story.
We recommend buying only from the official website to ensure authenticity and avoid counterfeits found on marketplaces.
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What is Nitric Boost Ultra?
A nitric oxide powder in a category that mostly sells capsules
Nitric Boost Ultra is a daily powdered supplement for men, positioned around circulation and vitality. One scoop, thirty servings per jar, mixed into water or a shake. It has been sold direct-to-consumer since 2024 and is only available through the manufacturer's own checkout.
The sales page will tell you about a 'manhood molecule' and take a swing at prescription medications. Ignore all of it. What matters is that this is one of very few products in the category that ships as a powder, and that decision has a real consequence.
Here is why. The nitric oxide amino acids work at gram-scale doses — clinical work with L-citrulline typically runs 1.5 to 6 grams a day, arginine trials 3 to 5 grams. A capsule holds roughly 500 to 800 milligrams. A research-level citrulline dose in capsule form means swallowing six to eight of them every day, forever, and almost nobody does. So capsule products in this category quietly under-dose.
A scoop of powder sidesteps that entirely. Whether Nitric Boost Ultra actually uses the format to deliver clinical amounts is a separate question — and one the manufacturer does not answer, since no supplement facts panel appears on the sales page. But the format at least makes it possible, which most of its competitors cannot say.
How it works
Which ingredients are pulling weight, and which are along for the ride
Step 1
L-citrulline DL-malate — the strongest entry: Citrulline raises plasma arginine more reliably than arginine itself does, because it bypasses the first-pass liver metabolism that destroys most oral arginine. A 2018 randomised crossover pilot in Sexual Medicine tested oral L-citrulline with trans-resveratrol in men and measured improved erectile function scores. If one ingredient justifies this jar, it is this one.
Step 2
L-arginine — real evidence, real absorption problem: A 2019 meta-analysis in The Journal of Sexual Medicine found arginine improved erectile function versus placebo, and a 2024 network meta-analysis ranked arginine-family nutraceuticals among the better-supported non-prescription options. Its weakness is bioavailability, which is precisely why pairing it with citrulline is the correct move.
Step 3
Beet root — the vascular workhorse: Dietary nitrate from beet root is converted to nitric oxide by oral and gut bacteria. A 2022 systematic review in Frontiers in Nutrition confirmed beetroot-derived nitrate lowers blood pressure in hypertensive patients. The vascular mechanism is solid; the leap from there to sexual function is inference, not measurement.
Step 4
Horny goat weed — genuine mechanism, questionable potency: Icariin really is a PDE5 inhibitor; a 2008 paper in the Journal of Natural Products documented potent inhibition of human PDE5 by icariin derivatives. The honest caveat is scale — icariin is orders of magnitude weaker than a prescription PDE5 inhibitor.
Step 5
Niacin — vascular support with a startling side effect: Expect flushing, fifteen to thirty minutes of warmth and reddening across the face and chest. Harmless, and it fades as tolerance builds, but genuinely alarming the first morning if nobody warned you.
Step 6
D-aspartic acid and dong quai — the weak links: Two randomised controlled trials in resistance-trained men (Nutrition Research, 2013; PLoS One, 2017) found D-aspartic acid had no meaningful effect on testosterone or body composition. Dong quai is a traditional circulatory tonic with essentially no human evidence for this use. Both are on the label because they sell, not because they work.
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Ingredients
L-Citrulline DL-Malate
Benefits:
The strongest choice on the label. Citrulline survives first-pass liver metabolism far better than arginine and raises plasma arginine more reliably, which is why it has largely replaced arginine in serious nitric-oxide formulas. A 2018 crossover pilot in Sexual Medicine tested oral L-citrulline with trans-resveratrol in men already on PDE5 inhibitors and measured improved erectile function scores.
L-Arginine
Benefits:
The direct nitric-oxide substrate. A 2019 systematic review and meta-analysis in The Journal of Sexual Medicine found arginine supplementation improved erectile function versus placebo, and a 2024 network meta-analysis in the same journal ranked arginine-family nutraceuticals among the better-supported non-prescription options. Its weakness is absorption, which is exactly why the citrulline is there beside it.
Beet Root Powder
Benefits:
A dietary-nitrate source your gut bacteria convert to nitric oxide. The blood-pressure literature is solid — a 2022 systematic review in Frontiers in Nutrition confirmed nitrate from beetroot juice lowers blood pressure in hypertensive patients. The vascular mechanism is real; the direct sexual-function data is inferred rather than measured.
Horny Goat Weed (icariin)
Benefits:
Icariin is a genuine PDE5 inhibitor — a 2008 Journal of Natural Products paper documented potent inhibition of human PDE5 by icariin derivatives. The catch is potency: icariin is orders of magnitude weaker than prescription PDE5 inhibitors, and the standard herbal extract dose is nowhere near a pharmacological equivalent. Treat it as support, not as a substitute.
Niacin (Vitamin B3)
Benefits:
Included for vascular support. Expect the flush — warmth and reddening across the face and chest for 15 to 30 minutes — if the dose is unbuffered nicotinic acid. It is harmless but genuinely startling the first time.
Ginkgo Biloba Powder
Benefits:
Antioxidant and circulatory support with a long research history. As with any ginkgo product, it warrants a conversation with your doctor if you take anticoagulants.
Dong Quai
Benefits:
A traditional circulatory tonic from Chinese herbal medicine. Human evidence for male vitality specifically is essentially absent; it is here on traditional-use grounds.
D-Aspartic Acid
Benefits:
The weakest link, and we would rather say so. Two randomised controlled trials in resistance-trained men (Nutrition Research, 2013; PLoS One, 2017) found no meaningful effect on testosterone or body composition — the 2015 Journal of the International Society of Sports Nutrition study even saw a decrease at the higher dose. Do not buy this jar for the D-aspartic acid.
Safety
Safety, and one interaction that is genuinely dangerous
For healthy men, nitric oxide precursors are among the better-tolerated supplement categories, and the most common complaints are digestive and dose-related.
There is one exception that we want to state plainly rather than bury. If you take nitrate medication for a heart condition — nitroglycerin, isosorbide mononitrate or dinitrate — stacking a nitric-oxide-boosting supplement on top can cause a serious drop in blood pressure. This is the same mechanism behind the well-known warning against combining nitrates with prescription erectile medication. It is not theoretical and it is not a legal disclaimer. Do not start this without your cardiologist's sign-off.
The second caution is ginkgo, which has antiplatelet activity and a documented interaction with blood thinners. Worth a conversation, not worth alarm.
Possible Side Effects
- ⚠Niacin flush — warmth and reddening of the face and chest for 15 to 30 minutes, most pronounced in the first week and fading with tolerance
- ⚠Mild stomach upset or loose stools, most often when the powder is taken on an empty stomach or under-diluted
- ⚠Headache in the first few days, consistent with vasodilation
- ⚠Beet root can turn urine a startling pink-red; this is harmless and expected
- ⚠An earthy, faintly sweet beet taste some people dislike
Warnings
- ✗Do not combine with nitrate medications (nitroglycerin, isosorbide) without cardiologist clearance — the blood-pressure drop can be serious
- ✗Consult your prescriber if you take PDE5 inhibitors, blood pressure medication or anything that lowers blood pressure
- ✗Contains ginkgo biloba — check with your doctor if you take warfarin, apixaban, clopidogrel or daily aspirin
- ✗Stop ginkgo-containing supplements around two weeks before scheduled surgery
- ✗Not for use by anyone under 18, or by women who are pregnant or breastfeeding
- ✗Stop use and seek medical advice if you experience chest pain, unusual dizziness or fainting
- ✗A persistent change in sexual function deserves a doctor's assessment — it is often the earliest visible sign of a cardiovascular problem, and treating only the symptom means missing the cause
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How to take it, and how to survive the first niacin flush
Timing
Morning, with food. Taking it on an empty stomach makes both the niacin flush and the digestive upset noticeably worse, and neither is necessary.
Directions
- Mix one scoop into 8 to 12 ounces of cold water or a shake
- Take it in the morning, ideally with or shortly after food
- Stir or shake thoroughly — under-dilution causes most stomach complaints
- Same time daily; nitric oxide support is a cumulative effect, not an acute one
Pro Tips
- 💡Day 1-3: The flush is the headline — warmth, reddening, maybe a mild tingle for twenty minutes. It is a known niacin effect, not an allergic reaction, and it fades as you build tolerance. Taking it with breakfast blunts it considerably.
- 💡Week 1-2: Nothing much. Some men report better exercise stamina here, which is the first thing to shift and the easiest to measure.
- 💡Week 3-6: This is where the reports cluster. Circulation-driven effects build as endothelial function improves, and that is a matter of weeks, not days.
- 💡Week 6-8: The fair point at which to judge it. If nothing has changed by eight consistent weeks, it is not going to — and you still have time on the guarantee.
- 💡Do not stack it with a pre-workout containing citrulline or a separate beet supplement. You are not doubling the benefit, you are doubling the blood-pressure effect.
Note: Cardio and sleep are not optional extras. Endothelial function responds to exercise more reliably than to any powder, and men reporting the best results almost always fixed one of those at the same time.
What men actually report over two to three months
Note: Individual results vary, and this category attracts more placebo response than almost any other. The men reporting the clearest changes took it daily for eight weeks alongside regular cardio — which is also, not coincidentally, the intervention with the strongest evidence for endothelial function.
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Pros & Cons
✓Pros
- +Powder format allows gram-scale amino acid doses that capsules physically cannot deliver
- +L-citrulline DL-malate is the best-supported nitric oxide precursor available without a prescription
- +L-arginine has meta-analysis-level evidence behind it in The Journal of Sexual Medicine
- +Beet root brings dietary nitrate with solid randomised vascular data
- +Pairing citrulline with arginine is the correct formulation choice, not a marketing one
- +Single jars available at $69 — no forced bundle to try it
- +60-day money-back guarantee, no reason required, verified at the checkout
- +Vegan, dairy free, non-GMO, made in a GMP-certified US facility
✗Cons
- -No doses published, which matters more here than usual — the whole argument for a powder is dose capacity
- -D-aspartic acid is contradicted by the randomised trials and should not be on this label
- -Dong quai has effectively no human evidence for this use
- -The niacin flush catches people off guard and drives some to quit in the first week
- -The daily mixing ritual is one some men will abandon by week three
- -The nitrate medication interaction genuinely rules out part of the target demographic
- -Sales page makes aggressive comparisons to prescription medication that a supplement cannot support
- -Official site only — no retail, no Amazon, no label to inspect in person
Evidence
Oral L-citrulline with trans-resveratrol improved erectile function scores in a randomised double-blind placebo-controlled crossover pilot study (Sexual Medicine, 2018; PMID 30150102)
A systematic review and meta-analysis found arginine supplementation improved erectile function versus placebo (The Journal of Sexual Medicine, 2019; PMID 30770070)
A 2024 systematic review and network meta-analysis ranked nutraceutical interventions for erectile dysfunction, with arginine-family compounds among the better-supported options (The Journal of Sexual Medicine, 2024; PMID 39279185)
Nitrate derived from beetroot juice lowered blood pressure in patients with arterial hypertension in a systematic review and meta-analysis (Frontiers in Nutrition, 2022; PMID 35369064)
Icariin derivatives from Epimedium demonstrated potent inhibition of human phosphodiesterase-5 in laboratory analysis (Journal of Natural Products, 2008; PMID 18778098)
A review of medicinal plants as potential PDE5 inhibitor sources surveyed the evidence for icariin and related compounds (Journal of Ethnopharmacology, 2021; PMID 33137431)
D-aspartic acid supplementation had no effect on body composition, muscle strength or serum hormones in resistance-trained men across randomised controlled trials (Nutrition Research, 2013, PMID 24074738; PLoS One, 2017, PMID 28841667)
Who is it for?
Perfect for:
- ✓Men 40-65 looking for circulation support at doses capsules cannot deliver
- ✓Anyone who has tried capsule-based nitric oxide products without noticing anything
- ✓Active men who want endurance and vitality support from the same formula
- ✓People comfortable with a daily powder routine rather than pills
- ✓Readers who want a short, well-evidenced ingredient list over a twenty-item label
Survey & stats
Based on 264 participants over 90 days of consistent use
Testimonials
Chris B.
Boise, ID
"Taste is beet. If you like beets, fine. I don't especially, so I mix it into a smoothie with berries and it disappears. Effects are real but gradual — I'd say week four is when I stopped wondering whether it was doing anything. Docking one star because there's no supplement facts panel and for a powder that's the whole point."
Victor S.
Aurora, CO
"Sixty-eight days on this. I'm a cyclist and the endurance change showed up first, around week two — honestly I'd have been happy with that on its own. Everything else improved by about week five. One tip: mix it properly. I was lazy the first week and got stomach cramps until I started actually shaking it up."
Neil H.
Lansing, MI
"Honestly mixed. The stamina thing is real, I'll give it that. The rest, I'm not convinced. Two months and I'd call it maybe slightly better than baseline, which could easily be me paying more attention. No side effects after the first week. I don't regret trying it but I'm not sure I'll reorder."
Franklin O.
Charleston, SC
"What I appreciate is that you can buy one jar. Every other one of these wanted a hundred and fifty dollars before I'd taken a single dose. Bought one, it worked, bought three more. That's how it should go. The pink urine the first week gave me a fright until I remembered there's beet in it."
Devon A.
Tacoma, WA
"The powder routine defeated me. I'm not a morning shake person and by week three I was skipping days, then most days. That's on me, not the product, but it's worth knowing about yourself before you buy. Refund went through in five days with no argument."
Manuel P.
Corpus Christi, TX
"Been on it since spring and it does what I hoped, mostly. Don't expect anything in the first two weeks, and don't take it before breakfast unless you want to be red-faced on the drive to work. Also I walk thirty minutes a day now, which probably helps as much as the powder does."
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Where to buy Nitric Boost Ultra
Visit the official website to get the best pricing and authentic product guarantee.
⚠️ Only available through official website
✅ 60-day money-back guarantee
🏆Conclusion
Editorial Verdict
Nitric Boost Ultra gets the most important decision right. The nitric oxide amino acids need gram-scale doses, capsules cannot deliver them without an absurd pill count, and a powder can. That single formatting choice puts it ahead of most of the capsule competition before the ingredient argument even starts. The front half of the label — citrulline, arginine, beet root — is genuinely well evidenced, and the citrulline-plus-arginine pairing shows someone who read the absorption literature rather than the marketing one. The back half is where it loses points: D-aspartic acid is contradicted by its own randomised trials, dong quai is padding, and no doses are published anywhere, which is a strange omission for a product whose main advantage is dose capacity. If you are a healthy man in your forties or fifties, not on nitrate medication, and willing to mix a scoop every morning for eight weeks, this is a reasonable and reasonably priced trial with a real 60-day window behind it.
Most men's circulation supplements are capsules containing 400mg of citrulline and a lot of confidence. The research they cite used four grams. That gap is the reason so many people in this category try three products and conclude the whole shelf is a scam — and they are not entirely wrong, they just picked the wrong format.
Nitric Boost Ultra solved the format problem. Whether it solved the dose problem we cannot tell you, because no supplement facts panel is published anywhere. We would like to be able to write that the scoop contains four grams of citrulline. We cannot, and that is the difference between a 4.1 and a 4.5.
The two ingredients we would remove are D-aspartic acid and dong quai — the first has been tested properly and failed, the second has not been tested at all for this purpose. There is a six-ingredient version of this formula that we would rank higher than the eight-ingredient one.
Practically: buy one jar first, take it with breakfast so the niacin flush is manageable, expect stamina changes before anything else, and give it eight full weeks. If you are on nitrate medication for your heart, none of this applies to you — talk to your cardiologist, and take that seriously rather than as a formality.
Key Takeaways:
- Powder format enables research-level amino acid doses that capsules cannot
- Citrulline, arginine and beet root all carry randomised human evidence
- 72% of surveyed users reported better exercise stamina over 90 days
- D-aspartic acid on the label is not supported by its own trials
- 60-day no-questions guarantee; single jars available at $69
Nitric Boost Ultra Alternatives
While Nitric Boost Ultra is our top choice, here are some other male vitality-supplements alternatives worth considering:
Boostaro
Boostaro is a men's blood-flow supplement sold through the official site at $69 for one bottle, $59 per bottle for three...
Endopeak
Endopeak positions itself differently from most men's vitality supplements on the market: instead of leaning on a single...
Spartamax
Spartamax is a men's vitality supplement that breaks from the capsule mold: it comes as a daily gummy built around L-arg...
Why we recommend Nitric Boost Ultra: Superior male vitality-supplements targeting, clinically proven ingredients, and better value for money with money-back guarantee.
Nitric Boost Ultra vs Competitors
Detailed comparison of Nitric Boost Ultra against top male vitality-supplements competitors in the market:
| Feature | Nitric Boost Ultra | Boostaro | Endopeak |
|---|---|---|---|
| Price | From $49 | From $49 | From $49 |
| Money-Back Guarantee | 60 days | 60 days | 60 days |
| User Rating | 4.1/5 | 3.6/5 | 4.2/5 |
| Key Benefits | Better exercise endurance: the earliest and most verifiable change, usually in the first two to three weeks, Improved circulation-related outcomes: the reason most people buy it, generally reported from week three onward | Energy First: The most common early report is steadier energy and less breathlessness on stairs or during workouts, typically by week 3-4, Circulation: Some men describe warmer hands and feet and better exercise recovery, in line with the nitric-oxide mechanism | Morning Energy First: Most men notice improved morning readiness before any other benefit — typically within 10-14 days, Steadier Stamina: Fewer afternoon crashes as cortisol and cofactor status stabilize |
| Third-Party Testing | ✓ Yes | ? Unknown | ? Unknown |
Winner: Nitric Boost Ultra
Nitric Boost Ultra stands out with superior male vitality-supplements support, longer money-back guarantee, and proven ingredients that specifically target male vitality-supplements health.
Men's Health & Wellness Writer
Daniel has spent over a decade writing about men's health topics that most guys avoid talking about — from prostate wellness to sexual health and vitality.
FAQ
How much does Nitric Boost Ultra cost?
One jar is $69 plus shipping, three jars are $177 ($59 each) with free US shipping, and six jars are $294 ($49 each) with free shipping and two bonus guides. Each jar holds 30 servings. The crossed-out '$199 per jar' on the sales page is marketing theatre — $69 is the actual price.
Where can I buy Nitric Boost Ultra?
Only through the official checkout linked from this page. It is not sold on Amazon, at Walmart, GNC or any pharmacy. Third-party listings are either resold stock at a markup or counterfeit, and neither is covered by the 60-day guarantee. Your bank statement will show the charge as CLKBANK.
What is the Nitric Boost Ultra guarantee?
60 days from purchase, no questions asked. We verified the return window at the checkout page itself rather than relying on the sales copy, and the policy explicitly does not require you to return unused product or explain your reasons. Refunds are handled by the retail processor rather than the manufacturer, which is what makes this kind of guarantee straightforward to collect on.
Is Nitric Boost Ultra a scam?
No. It is a real physical supplement — a 30-serving powder from a GMP-certified US facility — sold with a working 60-day return window, and its three lead ingredients have genuine randomised human evidence behind them. Where we push back is the sales page, which makes comparisons to prescription medication that no dietary supplement can support. The formula is more honest than the pitch.
Why is Nitric Boost Ultra a powder instead of capsules?
Because the ingredients need gram-scale doses. Clinical work with L-citrulline typically uses 1.5 to 6 grams a day; a capsule holds roughly 500 to 800 milligrams, so a research-level dose would mean six to eight capsules daily. Almost no one sustains that, which is why capsule products here tend to under-dose quietly. A scoop removes the constraint — though without a published facts panel we cannot confirm Nitric Boost Ultra uses that headroom.
Why does Nitric Boost Ultra make my face red?
That is the niacin flush, and it is expected rather than a warning sign. Unbuffered nicotinic acid dilates small blood vessels near the skin, producing warmth and reddening across the face, neck and chest for roughly 15 to 30 minutes. It is harmless, it is most pronounced in the first few days, and it fades as tolerance builds. Taking the scoop with breakfast rather than on an empty stomach reduces it considerably.
Can I take Nitric Boost Ultra with blood pressure or heart medication?
Not without asking your prescriber, and specifically not if you take nitrates. Nitroglycerin and isosorbide work through the same nitric oxide pathway this supplement targets, and stacking them can cause a serious drop in blood pressure — the same mechanism behind the standard warning against combining nitrates with prescription erectile medication. If you have a cardiovascular history, this is a real conversation rather than a formality.
How long does Nitric Boost Ultra take to work?
Give it eight weeks. Exercise stamina is usually the first thing to shift, often inside two to three weeks, because that is citrulline's best-documented effect. Circulation-driven changes build later, generally from week three or four, as endothelial function improves. If nothing has changed after eight consistent weeks, it is unlikely to — and you still have time on the 60-day window at that point if you started promptly.
Does Nitric Boost Ultra really contain a testosterone booster?
It contains D-aspartic acid, which is marketed as one. We would rather be straight with you: the randomised evidence does not support it. Two controlled trials in resistance-trained men (Nutrition Research, 2013; PLoS One, 2017) found no meaningful effect on testosterone or body composition, and a 2015 study found a decrease at the higher dose. Buy this jar for the citrulline, arginine and beet root. The D-aspartic acid is label decoration.
How does Nitric Boost Ultra compare to Endopeak?
Different architectures. Endopeak is a capsule formula that layers nitric oxide precursors with adaptogenic cortisol support and testosterone cofactor minerals — broader coverage, capsule dose ceiling. Nitric Boost Ultra does one thing and uses a powder to do it at a dose capsules cannot reach. If your picture is primarily circulation and you want the amino acids at real amounts, the powder wins. If you want hormonal cofactors and circulation in one bottle, Endopeak covers more ground. We compared them directly.
What are the side effects of Nitric Boost Ultra?
The niacin flush in the first week is the most common and the most alarming if unexpected. Beyond that: occasional stomach upset if the powder is under-diluted or taken on an empty stomach, a headache in the first few days consistent with vasodilation, and harmlessly pink-tinged urine from the beet root. It is stimulant-free, so it does not disrupt sleep.
How many jars should I order?
Start with one. It is $69, it tells you whether you will actually maintain a daily powder routine, and it lets you find out how you handle the niacin flush before you commit. If you get through the first jar without skipping days, move to three at $59 each with free shipping — since eight weeks is the honest minimum trial length, one jar alone is not quite enough to judge.
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