Test Booster · computed from the label

Testosil

by Leading Edge · $69.00 / 30 servings ($2.30/serving)
D
Formula
Badly underdosed
C
Deal
Marked up

"Clinically studied KSM-66." 10+ ingredient label — every dose disclosed.

3 of 8 recognized ingredients hit their clinically studied dose.

Ingredients vs the studied dose

IngredientLabel doseStatus
Vitamin D3
4,000 IU vitamin D3 — double the 2,000 IU target
4000 IU✓ OK
Zinc
40mg zinc — above the 30mg dose (at the upper safe limit)
40mg✓ OK
D-Aspartic Acid
2g D-aspartic acid — below the ~3g studied amount (and the evidence is shaky)
2g⚠ LOW
Ashwagandha (KSM-66)
300mg KSM-66 ashwagandha — half the 600mg used in the strongest trial
300mg⚠ LOW
Panax Ginseng
180mg Panax ginseng — near the 200mg dose
180mg✓ OK
L-Arginine
250mg L-arginine — a fraction of the ~3g needed to do anything
250mg⚠ LOW
Fenugreek Extract
50mg fenugreek extract — far below the ~600mg studied dose
50mg⚠ LOW
Garlic Extract
24mg garlic extract — a token amount, effectively fairy dust
24mg⚠ LOW

Make it yourself — per serving

Ingredient (bulk)Cost/serving
Ashwagandha (KSM-66)$0.06
Zinc$0.01
Vitamin D3$0.04
D-Aspartic Acid$0.26
Panax Ginseng$0.05
Your DIY cost$0.43
Leading Edge charges ($69.00 / 30 servings)$2.30

That's a 5.4× markup over building the same actives from bulk powders.

The verdict

Fully disclosed, so we grade it on its real numbers — and they show a familiar pattern. Vitamin D and zinc are solidly dosed, but the headline KSM-66 ashwagandha is only 300mg (half the 600mg used in the strongest trial), D-aspartic acid is light, and the fenugreek, L-arginine and garlic are fairy-dust amounts doing essentially nothing. A couple of real ingredients carried by a long list of tokens. The parts that work are cheap in bulk.
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Educational only — not medical advice. Grades and clinical doses are computed from public labels against sourced research (citations on the main site); prices last verified 2026-07-21. Expensive Powder has no sponsors; bulk links may earn an affiliate commission, which never affects a grade. Talk to a clinician before starting any supplement.