ASL | Letro-XT | 60 TabletsASL
- SuppVault Score
- 70/100
- Per serving
- $0.83

ASL
Patented anti-estrogen support with clinical-entry DIM and stress control
$49.99 $0.83/servingScore reflects incomplete data — label not yet scanned. Not a quality judgment.
The label is the formula. We score it either way.
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Targeted hormone-support formula with 60mg Letrosterone™ and 100mg DIM. Built to support estrogen balance, stress resilience, and a more controlled recovery environment without stimulants.
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Letrosterone™ | 60mg | † |
| Diindolylmethane (DIM) | 100mg | † |
| Holy Basil Leaf | 150mg | † |
| Phosphatidylserine | 100mg | † |
† Daily Value (DV) not established for this ingredient.
ASL publishes test results from independent third-party labs. Svpplements links to the manufacturer’s data — we don’t test products ourselves.
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Creatine handles muscular performance and ATP-related output while Letro-XT handles the hormonal-support side. That makes this a clean, non-overlapping stack for lifters who want both performance and hormonal composure covered.
Take creatine daily; take Letro-XT at a consistent time each day
Users reaching for hormone-support formulas often benefit from broader support practices as well. This pairs well in structured support phases where recovery and internal health are both priorities.
Take separately with meals; Letro-XT once daily
Arimigen likely appeals more to users wanting a more direct, category-established estrogen-control profile.
Letro-XT has a cleaner stress-support angle thanks to Holy Basil and Phosphatidylserine alongside DIM.
Both fit the estrogen-support category well, but Letro-XT is stronger on disclosed support actives while Estrozole may appeal to users seeking a different ingredient philosophy.
Letro-XT is the better choice when the goal is targeted estrogen support rather than broader general male support.
Side-by-side against the closest competitors. Score reflects clinical dosing, transparency, and testing.
ASL | Letro-XT | 60 TabletsASL
APS Nutrition | Arimigen | 60 TabletsAPS Nutrition
Arimigen likely appeals more to users wanting a more direct, category-established estrogen-control profile.
Compare side-by-side →
VMI Sports | Arima-XD | 60 CapsulesVMI Sports
Letro-XT has a cleaner stress-support angle thanks to Holy Basil and Phosphatidylserine alongside DIM.
Compare side-by-side →
Afterdark | Estrozole | 90 CapsulesAfterdark
Both fit the estrogen-support category well, but Letro-XT is stronger on disclosed support actives while Estrozole may appeal to users seeking a different ingredient philosophy.
Compare side-by-side →Comparison data combines live storefront pricing with our SuppVault analysis. Competitor scores reflect public-label data; manufacturer-side changes may not be reflected in real time.
ASL Letro-XT is a targeted hormone-support formula designed around one clear objective: improve the estrogen-and-stress side of the hormonal equation rather than pretending every hormone product needs to be a kitchen-sink testosterone booster. That makes the formulation strategy more focused than most category entries. Instead of loading the label with tribulus, fenugreek, and generic libido ingredients, Letro-XT concentrates on estrogen modulation, cortisol control, and maintaining a more favorable internal environment for recovery, body composition, and overall hormonal balance.
The centerpiece is Letrosterone™ at 60mg, a patented anti-estrogen compound from dehydroeliolidide and N-benzoyl-phenylalanine methyl ester. Human clinical literature on this exact compound is limited compared with established nutrients, so the most honest assessment is that this is the formula's proprietary differentiator rather than its most clinically validated component. The practical role is clear: it is positioned as the direct anti-estrogen driver of the formula and gives Letro-XT its category identity. Customers using this product are likely choosing it specifically for that targeted anti-estrogen angle rather than broad wellness support.
DIM is included at 100mg, which matters. Based on the ingredient knowledge base, the clinically relevant range is 100-200mg, so ASL lands right at the entry point of the researched dose window. DIM works by shifting estrogen metabolism away from the more proliferative 16-alpha-hydroxyestrone pathway and toward the more favorable 2-hydroxyestrone pathway. It also shows mild aromatase-inhibiting activity, interacts with the aryl hydrocarbon receptor, and can increase sex hormone-binding globulin. What you feel from DIM is rarely dramatic on day one, but over time users often report feeling less puffy, more balanced, and more "dialed in" when estrogen management is part of the goal.
Holy Basil (Ocimum sanctum) is dosed at 150mg. This is below the 400-500mg range often seen in the research context for basil-family extracts, so this is best described as a supportive, not standalone, dose. Even so, its role is smart. Holy Basil is used for stress adaptation, oxidative balance, and inflammatory control, which matters because hormonal support is rarely just about estrogen. If stress is high and cortisol is chronically elevated, recovery, mood, and body composition all suffer.
Phosphatidylserine is included at 100mg. The strongest research base for PS is around 300mg daily, so this is also below the classic standalone research dose. That said, it still makes formulation sense here. Phosphatidylserine is a membrane phospholipid with evidence for supporting cognitive function and helping modulate cortisol during stress. In a formula like this, it acts as a complementary recovery and neuroendocrine support ingredient rather than the main event.
The synergy is straightforward and intelligent: Letrosterone™ and DIM address estrogen from different angles, while Holy Basil and Phosphatidylserine help manage the stress side that can compound hormonal imbalance. That creates a more complete "hormone environment" product than a simple estrogen blocker alone. Transparency is mixed. The actives and their doses are disclosed, which is a major positive, but formula metadata indicates a proprietary-blend issue in the broader product context, and the patented Letrosterone™ compound itself lacks the depth of public human data available for ingredients like DIM.
What to expect: day 1 is usually subtle. This is not a stimulant or instant-feel product. Over 2-4 weeks of consistent use, the intended experience is better hormonal composure: less perceived water retention, steadier mood, cleaner recovery, and a more controlled feel during demanding training phases where estrogen management and stress load both matter.
DIM is formed from indole-3-carbinol metabolites and influences estrogen handling at the metabolite level rather than acting like a blunt-force pharmaceutical intervention. Its best-known mechanism is shifting conversion away from 16-alpha-hydroxyestrone toward 2-hydroxyestrone, which is generally viewed as the more favorable pathway. DIM also interacts with the aryl hydrocarbon receptor and may exert mild aromatase-related effects. That combination makes it one of the more mechanistically credible non-prescription ingredients for estrogen-support formulas.
Hormonal outcomes are not driven by sex hormones alone. Chronic stress alters cortisol dynamics, recovery quality, inflammatory tone, and body-composition regulation, which is why formulas that ignore stress pathways are often incomplete. Holy Basil contributes antioxidant and stress-adaptation properties, while Phosphatidylserine has evidence for cortisol modulation during acute stress. Together they support a broader neuroendocrine environment rather than a single-pathway claim.
Phosphatidylserine is a structural phospholipid heavily concentrated in neuronal membranes, where it influences signaling efficiency and membrane dynamics. Oral supplementation has been studied for cognitive effects, but exercise and stress research also suggest a role in moderating cortisol responses under demanding conditions. The most robust research often uses around 300mg daily, so 100mg should be interpreted as a supporting dose rather than a maximal standalone dose. In a multi-ingredient formula, that can still be useful when layered with complementary stress-support ingredients.
A focused formula is often easier to evaluate clinically because each ingredient has a defined job. Letro-XT uses a primary anti-estrogen compound, one mechanistically relevant estrogen-metabolism ingredient, and two stress-support ingredients. That is a more coherent strategy than many category products that scatter weak doses of libido herbs, testosterone botanicals, and mood ingredients without a real formulation center. For educated consumers, focus often beats label noise.
Verified athletes can view NCAA, WADA, and high-school compliance status for this product.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before use if you have a medical condition or take medications.
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