Amino Acid
L-Citrulline (Erectile Support)
Also known as: Citrulline, L-Cit, Citrulline malate
Amino acid that converts to arginine more efficiently, supporting nitric oxide for erections.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every L-Citrulline (Erectile Support) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | BulkSupplements L-Citrulline Powder | 91 A | $0.07 |
| 2 | Transparent Labs BULK Pre-Workout | 90 A | $1.67 |
| 3 | Nutricost Pre-Workout For Women Powder | 89 A | $0.73 |
| 4 | Nutricost Pre-Workout Complex | 89 A | $0.83 |
| 5 | Double Wood L-Citrulline Supplement | 88 A | $0.19 |
| 6 | NOW Foods L-Citrulline Pure Powder | 87 A | $0.28 |
| 7 | Onnit Total Nitric Oxide - Harvest Fruit (20 Serving Tub) | 85 A- | $2.00 |
| 8 | BulkSupplements L-Citrulline DL-Malate 1:1 Powder | 84 A- | $0.26 |
| 9 | Micro Ingredients L-Citrulline Malate Powder | 84 A- | $0.17 |
| 10 | Pure Encapsulations Nitric Oxide Support | 82 A- | $1.70 |
| 11 | Gorilla Mind Gorilla Mode Nitric | 82 A- | $1.50 |
| 12 | Pure Encapsulations Nitric Oxide Ultra (capsules) | 78 B+ | $1.43 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much L-Citrulline (Erectile Support) should I take?
The typical range is 1.5-3g L-Citrulline daily for erectile (higher for exercise). Ongoing for sustained effect
When should I take L-Citrulline (Erectile Support)?
1-2 hours before activity. Either way.
Which form of L-Citrulline (Erectile Support) is best?
L-Citrulline — Pure form. Other forms in the catalog: Citrulline malate.
Is L-Citrulline (Erectile Support) safe?
Commonly reported: GI upset (rare). Serious warnings: Less likely to trigger herpes than arginine. Safe
Which L-Citrulline (Erectile Support) supplement scores highest?
BulkSupplements L-Citrulline Powder, at 91/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Daily target & upper limit
6 g / dayL-Citrulline (Erectile Support) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
L-Citrulline (Erectile Support) dosage reference →Primary uses
- Erectile function
- Nitric oxide
- Blood flow
- Exercise performance
How it works
- Converts to L-Arginine in kidneys
- Sustained nitric oxide boost
- May be more effective than arginine
- Also exercise performance
Dosage
- Typical range
- 1.5-3g L-Citrulline daily for erectile (higher for exercise)
- Timing
- 1-2 hours before activity
- With food
- Either way
- Duration
- Ongoing for sustained effect
- Special populations
- Erectile support, exercise performance
Forms
- L-Citrulline
- Citrulline malate
Safety
Common side effects
- GI upset (rare)
Contraindications
- Blood pressure medications (monitor)
Products containing L-Citrulline (Erectile Support)
Top-scoring supplements in our catalog that list L-Citrulline (Erectile Support) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Good evidence for erectile support, may be better than arginine
Grade B: Some human trials support key claims; further confirmation needed.
Related in Amino Acid
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.