Nitric Boost Ultra Ingredients: What's Inside and What the Research Says
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Nitric Boost Ultra contains eight ingredients chosen to support nitric oxide production, healthy blood flow and male vitality. Some are among the best-studied compounds in sports nutrition. Others come from traditional herbal medicine and have far less human research behind them. This guide explains what each ingredient is, why it is in the formula, how strong the evidence is, and what safety points to know.
Nitric Boost Ultra ingredients at a glance
| Ingredient | Type | Why it's included |
|---|---|---|
| L-Citrulline DL-Malate | Amino acid | Raises arginine levels for nitric oxide production |
| L-Arginine | Amino acid | Direct building block of nitric oxide |
| Beet Root Powder | Vegetable extract | Natural dietary nitrate |
| Ginkgo Biloba | Herb | Antioxidant support for blood vessels |
| Niacin | Vitamin B3 | Blood vessel dilation, energy metabolism |
| Horny Goat Weed | Herb | Traditional support for male vitality |
| D-Aspartic Acid | Amino acid | Hormone signaling |
| Dong Quai | Herb | Traditional circulation support |
How the ingredients work together
Your body has two routes to nitric oxide. In the first, an enzyme in the lining of your blood vessels converts L-arginine into nitric oxide. In the second, nitrate from vegetables is converted by bacteria in your mouth into nitrite, which the body then turns into nitric oxide. Nitric Boost Ultra feeds both routes: citrulline and arginine supply the first, and beetroot supplies the second. Ginkgo adds antioxidants that may help nitric oxide last longer once it is made, while niacin, horny goat weed, D-aspartic acid and dong quai round out the formula with circulation and vitality support.
The core nitric oxide ingredients
L-Citrulline DL-Malate
Citrulline is an amino acid found naturally in watermelon. When you take it, your kidneys convert it into arginine. Surprisingly, citrulline raises blood arginine levels more effectively than arginine itself, because it avoids much of the breakdown that happens in the gut and liver. That makes it the most important nitric oxide ingredient in the formula.
Evidence: good. Reviews of the research link citrulline to better training volume and less muscle soreness, typically at 3 to 8 grams per day. The "malate" part is a compound involved in cellular energy production.
L-Arginine
Arginine is the amino acid your blood vessels use directly to make nitric oxide. It is found in meat, fish, nuts and legumes.
Evidence: mixed. A large share of oral arginine is broken down before it reaches circulation, so results from arginine-only supplements are inconsistent. Pairing it with citrulline, as this formula does, is a more sensible approach. People prone to cold sores are sometimes advised to avoid high arginine intake.
Beet Root Powder
Beets are one of the richest food sources of dietary nitrate. Once eaten, nitrate is converted step by step into nitric oxide, a pathway that becomes especially useful when oxygen levels in muscles are low, such as during hard exercise.
Evidence: good for concentrated beetroot juice, which has improved exercise efficiency and endurance in many studies. Powder in capsules delivers much less nitrate than those juice shots, so its contribution here is supportive rather than dramatic.
Supporting ingredients
Ginkgo Biloba
Extract from the leaves of the ginkgo tree contains flavonoids and terpenoids with antioxidant properties. In this formula, its role is to help protect blood vessels and nitric oxide from oxidative stress.
Evidence: moderate for circulation, mixed for memory and cognition. Ginkgo can affect blood clotting, so anyone on blood thinners or scheduled for surgery should check with a doctor.
Niacin (Vitamin B3)
Niacin is an essential vitamin involved in turning food into energy. It also widens small blood vessels near the skin, which is what causes the well-known "niacin flush": a short-lived warm, red, tingling feeling.
Evidence: well established as a vitamin. The flush is generally harmless and often fades with regular use. Avoid stacking it with other high-niacin supplements.
Horny Goat Weed
Also called epimedium, this herb has been used in traditional Chinese medicine for centuries. Its main active compound, icariin, has been shown in laboratory studies to interact with the same enzyme pathway that erectile dysfunction medications target.
Evidence: limited. Most research is in cells and animals, and good-quality human trials are scarce. Its effect at the amount found in a combination capsule is unknown.
D-Aspartic Acid
D-aspartic acid is an amino acid that plays a role in signaling the release of hormones, including those involved in testosterone production.
Evidence: inconsistent. A systematic review found that some studies showed an increase in testosterone, mainly in men with low levels, while others in trained men found no effect.
Dong Quai
Dong quai root is a staple of traditional Chinese herbal practice, used for circulation and, traditionally, for women's health.
Evidence: limited modern clinical research. It contains natural coumarin compounds and should not be combined with warfarin or other blood thinners without medical advice. It is not recommended during pregnancy.
What Nitric Boost Ultra does not contain
The formula contains no caffeine, synephrine or other stimulants. That is an important difference from most "pump" pre-workout products, which usually rely on 200 to 300 milligrams of caffeine per serving. It means you can take Nitric Boost Ultra in the evening without it affecting your sleep. The seller also describes the formula as non-GMO and free of common allergens such as soy and gluten; check the label if you have specific allergies.
A note on doses
Two capsules can hold only around 1 to 1.6 grams of total ingredients. That is well below the several grams of citrulline used in the strongest studies. This is true of every capsule nitric oxide supplement, not just this one, and it is the main reason to expect gradual, modest effects. We discuss this in more detail in our full Nitric Boost Ultra review.
Are the ingredients safe?
For most healthy adults, these ingredients are well tolerated at supplement doses. The main concerns are interactions: the formula may add to the effect of blood pressure medication, nitrates and erectile dysfunction drugs, and ginkgo and dong quai may increase bleeding risk with blood thinners. Our side effects guide covers this in detail, and our how to take guide explains how to avoid doubling up on ingredients from other supplements.
Frequently asked questions
What is the main ingredient in Nitric Boost Ultra?
L-citrulline is the most important active ingredient, supported by L-arginine and beetroot as additional nitric oxide sources.
Does Nitric Boost Ultra contain caffeine?
No. It is completely stimulant-free.
Are the ingredients natural?
Yes. The formula combines amino acids, a vitamin and plant extracts. Natural does not automatically mean risk-free, so review the safety notes above.
Can I take it with other supplements?
Avoid combining it with other products that contain citrulline, arginine, niacin or ginkgo, so you do not exceed sensible amounts. Ask your doctor if you take any medication.
References
- Gonzalez AM, Trexler ET. Effects of citrulline supplementation on exercise performance in humans: a review of the current literature. J Strength Cond Res. 2020;34(5):1480–1495.
- Jones AM. Dietary nitrate supplementation and exercise performance. Sports Med. 2014;44(Suppl 1):S35–S45.
- Roshanzamir F, Safavi SM. The putative effects of D-aspartic acid on blood testosterone levels: a systematic review. Int J Reprod Biomed. 2017;15(1):1–10.
- National Institutes of Health, Office of Dietary Supplements. Niacin: Fact Sheet for Health Professionals.
- National Center for Complementary and Integrative Health. Ginkgo.