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Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico, U.S. territories and APO/FPO/DPO addresses can take longer. You get a tracking number by email as soon as your order ships.
Free returns within 30 days of delivery: we email you a prepaid return label, no reason needed. Items must be unopened, with the manufacturer or tamper-evident seal intact, in their original packaging. Opened, used or partially consumed vitamins, minerals and supplements, items with broken or missing seals, and gift cards can't be returned. Damaged, defective, incorrect or expired items are always covered. Refunds go back to your original payment method within 10 business days of approval.
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Talk to your doctor or pharmacist before starting a supplement, especially if you're pregnant or nursing, take medication, or have a medical condition.
†These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
Talk to your doctor or pharmacist before starting a supplement, especially if you're pregnant or nursing, take medication, or have a medical condition.
Maximum Human Performance STRONG AF is a sour-candy pre-workout powder for strength athletes and powerlifters, with 40 servings formulated to support high-intensity training and recovery.
STRONG AF is made for demanding strength sessions where athletes want formula support for power, endurance, focus, and recovery. Its ingredients address several workout-related pathways, including ATP resynthesis, nitric oxide production, lactate buffering, and neurotransmitter activity. The powder is intended for training use by strength athletes and powerlifters; the formula’s stimulant content is part of its energy and focus approach.
The formula combines creatine, shilajit, and Alpha-GPC to support processes involved in ATP production and muscle power. Creatine monohydrate supports ATP regeneration during high-intensity efforts and is included for lean-mass support through cellular hydration and protein synthesis. Shilajit is included to support mitochondrial respiration, while Alpha-GPC supports acetylcholine synthesis and training-related power output.
Citrulline malate and beta-alanine are included to support endurance and delay exercise fatigue. L-citrulline converts to L-arginine, which supports nitric oxide production and muscle pumps; malate is included for its role in the Krebs cycle and ATP production. Beta-alanine supports carnosine levels, which help buffer acidity during exercise.
Caffeine supports alertness, motivation, and energy, while Alpha-GPC and DMAE are included for focus and cognitive support during training. The formula connects these ingredients with acetylcholine synthesis and catecholamine signaling, mechanisms associated with neuromuscular activation and workout motivation. Caffeine is also included for support of fat oxidation.
STRONG AF suits strength athletes and powerlifters looking for a flavored pre-workout powder with ingredients aimed at power, endurance, energy, focus, and recovery. Its 40-serving format and multi-pathway formula make it a training-focused option for athletes seeking support during high-intensity sessions.
Q: How many servings are in Maximum Human Performance STRONG AF?
A: Maximum Human Performance STRONG AF pre-workout powder comes in a 40-serving format.
Q: What flavor is Maximum Human Performance STRONG AF?
A: Maximum Human Performance STRONG AF pre-workout powder is sour candy flavored.
Free standard shipping on every order to U.S. addresses, with no minimum. Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico, U.S. territories and APO/FPO/DPO addresses can take longer. You get a tracking number by email as soon as your order ships. See shipping details.
Free returns within 30 days of delivery. Free returns within 30 days of delivery: we email you a prepaid return label, no reason needed. Items must be unopened, with the manufacturer or tamper-evident seal intact, in their original packaging. Opened, used or partially consumed vitamins, minerals and supplements, items with broken or missing seals, and gift cards can't be returned. Damaged, defective, incorrect or expired items are always covered. Refunds go back to your original payment method within 10 business days of approval. See returns & refunds.
Damaged, defective, incorrect or expired item? Email your order number, a photo and the lot/expiration details to sales@naturalvitaminsonline.com and we will arrange a replacement or refund; this is always covered. Please report visible shipping damage within 7 days of delivery.
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