Spartamax vs Boostaro & Nitric Boost Ultra: Gummies, Pills, Powder?
Affiliate disclosure: This article contains affiliate links for Spartamax. If you buy through them, we may earn a commission at no extra cost to you. All five options below follow identical evidence rules. Read our [affiliate disclosure](/post/affiliate-disclosure). This is not medical advice.
Short answer: In a head-to-head Spartamax vs. Boostaro and Nitric Boost Ultra comparison, format physics and refund policies separate the three online brands — yet none ranks #1 overall. NutraBio 100% Pure L-Citrulline (#1, 4.3/5) and HumanN SuperBeets Heart Chews (#2, 3.9/5) lead because both file exact milligram labels with the NIH under $1.35/day. Among the three ClickBank formulas, Nitric Boost Ultra (#3, 3.4/5) fits men willing to drink beet powder for gram-scale amino volume; Spartamax (#4, 3.2/5) suits men 45–75 who dislike pills, want stress adaptogens (Tongkat Ali and Ashwagandha), and value a 365-day refund window; and Boostaro (#5, 3.0/5) finishes fifth on proprietary dosing and blood-thinner caveats. See our full Spartamax review for single-brand details.
Spartamax vs. Boostaro vs. Nitric Boost Ultra at a glance
Feature | Spartamax | Boostaro | Nitric Boost Ultra |
Daily format | 1 gummy (30/jar) | 2 capsules (60/bottle) | 1 scoop (30/jar) |
Core focus | Flow + cortisol & drive herbs | Arterial circulation | Beet & amino vasodilation |
Key actives | L-Arginine, Beetroot, Tongkat Ali, Maca, Ashwagandha, Epimedium, Grape Seed | L-Citrulline, Pine Bark, Vit C, L-Lysine, Mg, K2, Nattokinase | Beetroot, L-Arginine, L-Citrulline, D-Aspartic Acid, Epimedium, Ginkgo, Niacin |
NIH DSLD & doses | 0 DSLD; mg not disclosed | 0 DSLD; proprietary blend | 0 DSLD; mg not disclosed |
2026 price | $49–$69/jar | $49–$69/bottle | $49–$69/jar |
Refund window | 365 days (Aurora, CO) | 180 days | 180 days |
Trustpilot score | ~3.8/5 (~3 reviews) | ~3.1/5 (~3 reviews) | ~2.1/5 (11 reviews) |
How we scored these 2026 male circulation formulas
Search results for spartamax vs boostaro, boostaro reviews, and nitric boost ultra reviews rarely check whether studied human doses physically fit inside a gummy or pill. On November 7, 2026, we graded five supplements on four rules:
Human PubMed trials: Clinical doses compared against the weight capacity of a 3.5 g gummy, two capsules, or a powder scoop.
NIH DSLD clarity: Public milligram filings in the federal Dietary Supplement Label Database.
Safety for men 45–75: Drug interactions with blood-pressure meds, PDE5 pills, nitrates, and anticoagulants.
Checkout & refund friction: Verified bundle totals, warehouse rules, and Reddit/Trustpilot complaints.
Comparing 5 male circulation and vitality supplements in 2026
Rank & Formula | Format | Label Clarity | Cost / Day | Refund | Score |
#1 NutraBio L-Citrulline | 3–4 veggie caps | Disclosed (DSLD #50976) | ~$0.45–$0.69 | 30–90 days | 4.3 / 5 |
#2 SuperBeets Heart Chews | 2 soft chews | Disclosed (DSLD #323049) | ~$1.20–$1.33 | 90 days | 3.9 / 5 |
#3 Nitric Boost Ultra | 1 scoop | Not disclosed | $1.63–$2.63 | 180 days | 3.4 / 5 |
#4 Spartamax Gummies | 1 gummy | Not disclosed | $1.63–$2.63 | 365 days | 3.2 / 5 |
#5 Boostaro Capsules | 2 capsules | Proprietary | $1.63–$2.63 | 180 days | 3.0 / 5 |
1. NutraBio 100% Pure L-Citrulline — Best overall for clinical dosing (4.3/5)
NutraBio earns #1 by printing every milligram on NIH DSLD #50976: 500 mg free-form L-citrulline per veggie capsule (2,000 mg per 4 capsules), batch-tested with zero sugar. Because oral L-arginine breaks down heavily in the gut and liver, L-citrulline converts to L-arginine in the kidneys to raise nitric oxide more reliably.
In a single-blind trial of 24 men (mean age 56.5) with mild ED, 1,500 mg/day of L-citrulline for one month raised Erection Hardness Scores from 3 to 4 in 50% of men versus 8.3% on placebo ($P < 0.01$) without side effects (Cormio et al., 2011). Three capsules match 1,500 mg for ~$22–$26 per 150-count bottle.
Pros: NIH-verified label; matches mild-ED dosing; under $0.70/day.
Cons: Three to four large pills daily; zero stress herbs.
Best for: Value-focused men wanting pure, clinical-dose nitric oxide.
2. HumanN SuperBeets Heart Chews — Best pharmacy chewable (3.9/5)
For a retail chewable with public weights, check HumanN SuperBeets Heart Chews (NIH DSLD #323049). Two chews supply 500 mg non-GMO beet powder and 150 mg Enovita® grape seed extract (40 calories, 4 g sugars).
Across 16 RCTs of 810 adults, 100–300 mg/day of grape seed extract lowered systolic blood pressure by 6.08 mmHg and diastolic by 2.80 mmHg (Zhang et al., 2016). Separately, 11 trials in 349 hypertensive adults showed beet nitrates (200–800 mg/day) cut systolic pressure by 5.31 mmHg (Grönroos et al., 2024). A 30-day bag runs ~$36–$40.
Pros: Verified DSLD label; 150 mg grape seed dose; pharmacy access.
Cons: 4 g sugar per serving; zero libido or cortisol herbs.
Best for: Men wanting a disclosed-dose chew for blood pressure and vessels.
3. Nitric Boost Ultra — Best powder payload among the 3 online blends (3.4/5)
Among the three ClickBank rivals, Nitric Boost Ultra ranks highest (#3 overall) because one scoop fits multi-gram actives that pills and gummies cannot hold. It pairs beetroot powder, L-arginine, and L-citrulline DL-malate with D-aspartic acid, Epimedium, Ginkgo biloba, and niacin. Across 10 RCTs of 540 men with mild-to-moderate ED, L-arginine needed 1,500–5,000 mg/day to beat placebo on IIEF erectile scores (OR 3.37; 8.3% mild GI or headache rate) (Rhim et al., 2019).
Independent nitric boost ultra reviews flag real caveats. Milligram weights are not disclosed online, and zero NIH DSLD records match this powder (DSLD #307122 is an unrelated capsule). Epimedium icariin converts 91.2% to icariside II in rodent labs, yet lacks large standalone human ED trials (Niu et al., 2022). Reddit threads cite earthy beet taste and clumping, while nitricboost.com averages ~2.1/5 across 11 Trustpilot reviews. Jars cost $49–$69 (180-day refund).
Pros: Scoop fits gram-scale nitric-oxide volume; 180-day refund.
Cons: Hidden mg weights; messy beet drink; 2.1/5 Trustpilot score.
Best for: Men prioritizing raw amino-and-beet volume over convenience.
4. Spartamax — Best 1-gummy habit, stress adaptogens & 365-day refund (3.2/5)
Spartamax (Spartamax Male Performance Gummies) places #4 on undisclosed weights, yet solves two reasons older men quit Boostaro and Nitric Boost Ultra: pill fatigue and bedroom stress. You chew one gummy daily (30/jar, made in an FDA-registered, cGMP US facility; ships from Aurora, CO).
Alongside L-arginine, beetroot, grape seed, and *Epimedium*, Spartamax adds three compact adaptogens missing from Boostaro:
Tongkat Ali (*Eurycoma longifolia*): In a 6-month double-blind RCT of 45 men (mean age 47.4), 200 mg/day plus training improved erectile scores and testosterone (Leitão et al., 2021).
Ashwagandha (*Withania somnifera*): A 60-day RCT in 60 stressed adults showed 240 mg/day lowered morning cortisol ($P < 0.001$) and anxiety (Lopresti et al., 2019).
Black Maca (*Lepidium meyenii*): A 12-week RCT in men 21–56 found 1,500–3,000 mg/day raised desire by week 8 without changing testosterone (Gonzales et al., 2002).
A 3.5 g gummy holds ~300–800 mg of actives — plenty for 200–240 mg of Tongkat Ali or Ashwagandha, though too small for multi-gram L-arginine. Milligrams and sugars are not disclosed online, NIH DSLD shows zero records, and spartamax.nutraxyz.com has ~3 reviews (~3.8/5). Its standout perk is a 365-day ClickBank refund window ($49–$69/jar).
Pros: Easy 1-gummy habit; stress/drive adaptogens; 365-day refund; one-time billing.
Cons: Milligrams and sugars not disclosed online; cannot fit gram-dose aminos.
Best for: Men 45–75 who dislike pills and powders, feel performance stress, and want a 1-year refund net.
5. Boostaro — Circulation capsule held back by blend opacity & drug caveats (3.0/5)
Boostaro (2 capsules daily, 60 per bottle) combines L-citrulline, maritime pine bark extract, vitamin C, L-lysine, magnesium citrate, vitamin K2, and nattokinase. Pairing amino acids with pine bark polyphenols has vascular rationale, though early human studies lacked placebo controls.
Three drawbacks drop Boostaro to #5. First, it has zero NIH DSLD records, and promo pages hide individual L-citrulline weights inside a proprietary blend (~1,200–1,500 mg split across seven actives). Second, anecdotal boostaro reviews (usa-boostarro.com sits near 3.1/5 across ~3 Trustpilot reviews) note checkout upsells and modest early changes. Third, nattokinase and vitamin K2 create extra bleeding conflicts for men on warfarin, apixaban, clopidogrel, or daily aspirin. Bottles cost $49–$69 (180-day refund).
Pros: Sugar-free, tasteless capsules; 180-day refund.
Cons: Proprietary dosing; zero stress herbs; blood-thinner caveats.
Best for: Men not on blood thinners who prefer plain vascular pills.
Gummies vs. capsules vs. powder: how to choose
Weigh three rules before ordering:
Payload vs. 90-day consistency: Clinical trials run 4–12 weeks. Scoops hold far more raw amino weight, yet if gritty beet water goes unused after week two, a 1-gummy habit like Spartamax wins on adherence.
The mouthwash mistake: Spartamax, Nitric Boost Ultra, and SuperBeets need tongue bacteria to turn beet nitrate into nitrite and nitric oxide. In 19 adults, 7 days of chlorhexidine mouthwash cut oral nitrite by 90% and plasma nitrite by 25% ($P \le 0.001$), raising blood pressure (Kapil et al., 2013). Skip antiseptic mouthwash near beet supplements — see whether mouthwash kills good oral bacteria.
Drug safety & when to see a doctor: Never pair nitric-oxide boosters with chest-pain nitrates (nitroglycerin, isosorbide), and consult your MD before combining with sildenafil, tadalafil, blood-pressure drugs, or alpha-blockers (Mayo Clinic). Avoid Ashwagandha with liver disease or hyperthyroidism (NCCIH), and avoid Boostaro on blood thinners. Per the NIDDK, erection trouble lasting 2–3+ months can warn of heart disease or diabetes — see a doctor first.
Price, checkout rules, and refund windows in 2026
Verified November 7, 2026, all three ClickBank brands sell only via direct order pages (Amazon, Walmart, and eBay listings are unauthorized look-alikes without maker refunds):
Brand | 1-Month | 3-Month | 6-Month | Refund |
Spartamax | $69 + $9.99 ship | $177 ($59/jar, free ship) | $294 ($49/jar, free ship) | 365 days |
Boostaro | $69 + shipping | $177 ($59/btl, free ship) | $294 ($49/btl, free ship) | 180 days |
Nitric Boost Ultra | $69 + shipping | $177 ($59/jar, free ship) | $294 ($49/jar, free ship) | 180 days |
Refund check: Spartamax bills once via ClickBank (CLKBANK*COM, no auto-ship; 3- and 6-jar packs include 2 PDF guides, and declining 1 jar may show a 3-for-$138 upgrade). While the sales page promises a 365-day refund "no questions asked," /shipping.php asks for "unopened bottles" with your invoice sent to Returns Department c/o Spartamax, 19655 E 35th Dr #100, Aurora, CO 80011. Open one jar at a time, save slips and empty jars, and use clkbank.com if needed — see our Spartamax price and 365-day refund FAQ.
Natural ways to support blood flow without supplements
The NIDDK backs four free habits first: 150 minutes/week of brisk walking and strength work, nitrate-rich beets and leafy greens (without antiseptic mouthwash), 7–8 hours of sleep, and quitting tobacco while managing blood pressure and A1c.
FAQ
What is the main difference between Spartamax gummies and Boostaro capsules? Spartamax is a 1-daily gummy pairing circulation cofactors with stress and drive herbs (Tongkat Ali, Ashwagandha, Maca) under a 365-day refund. Boostaro is a 2-capsule vascular blend (L-citrulline, pine bark, K2, nattokinase) with a 180-day refund.
Which supplement offers a longer refund window: Spartamax or Boostaro? Spartamax offers 365 days via ClickBank (shipped back to Aurora, CO), double the 180-day window of Boostaro and Nitric Boost Ultra.
How do their nitric-oxide ingredient blends compare? Boostaro uses L-citrulline and pine bark in capsules; Nitric Boost Ultra uses a larger scoop of beetroot, L-arginine, and L-citrulline; Spartamax pairs compact beet, grape seed, and L-arginine doses with stress adaptogens.
Are chewable gummies like Spartamax easier to take daily than Boostaro pills? Yes for men tired of large capsules or messy powders, aiding 90-day consistency — though gummies hold fewer milligrams and minor sweeteners.
What do verified buyers say about Boostaro capsules? Sales-page quotes are unverified. On Trustpilot (usa-boostarro.com, ~3.1/5) and Reddit, anecdotal buyers like easy pills but critique hidden blend weights and upsells.
What are common complaints about mixing Nitric Boost Ultra every day? While its scoop holds larger beet and amino doses than a gummy, Reddit and Trustpilot (nitricboost.com, ~2.1/5) complaints cite earthy taste, clumping, and slow return emails.
Sources
Cormio L, et al. Oral L-citrulline improves erection hardness in mild ED. Urology. 2011. https://pubmed.ncbi.nlm.nih.gov/21195829/
Rhim HC, et al. Arginine Supplements on Erectile Dysfunction: Meta-Analysis. J Sex Med. 2019. https://pubmed.ncbi.nlm.nih.gov/30770070/
Grönroos R, et al. Beetroot juice on blood pressure in hypertension: Meta-analysis. Nutr Metab Cardiovasc Dis. 2024. https://pubmed.ncbi.nlm.nih.gov/39069465/
Kapil V, et al. Nitrate-reducing oral bacteria in blood pressure control. Free Radic Biol Med. 2013. https://pubmed.ncbi.nlm.nih.gov/23183324/
Leitão AE, et al. Eurycoma longifolia and training on erectile function in ADAM. Maturitas. 2021. https://pubmed.ncbi.nlm.nih.gov/33541567/
Lopresti AL, et al. Stress-relieving actions of ashwagandha extract. Medicine. 2019. https://pubmed.ncbi.nlm.nih.gov/31517876/
Gonzales GF, et al. Lepidium meyenii (MACA) on sexual desire in men. Andrologia. 2002. https://pubmed.ncbi.nlm.nih.gov/12472620/
Zhang H, et al. Grape seed extract on blood pressure: 16 RCTs. Medicine. 2016. https://pubmed.ncbi.nlm.nih.gov/27537554/
Niu Y, et al. Myth of icariin in improving erectile function. Transl Androl Urol. 2022. https://pubmed.ncbi.nlm.nih.gov/35958901/
NIH ODS. DSLD #50976 & #323049. https://dsld.od.nih.gov/label/50976 and https://dsld.od.nih.gov/label/323049
NIDDK (NIH). Erectile Dysfunction. https://www.niddk.nih.gov/health-information/urologic-diseases/erectile-dysfunction
NCCIH (NIH). Ashwagandha Safety. https://www.nccih.nih.gov/health/ashwagandha
Mayo Clinic. L-arginine Interactions. https://www.mayoclinic.org/drugs-supplements-l-arginine/art-20364681
U.S. FDA. Dietary Supplements. https://www.fda.gov/food/dietary-supplements
Medical disclaimer: This article is for general information only and does not replace physician advice. Dietary supplements are not reviewed or evaluated by the FDA before sale and are not intended to diagnose, treat, mitigate, or prevent any disease. Read our [medical disclaimer](/post/medical-disclaimer). Prices and refund terms were verified November 7, 2026 and may change.
