BioStacks
Best for
Ingredients (9)
Vitamin D
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Vitamin B6
100%Dose
10.5 mg
Target
1.3–25 mg
Form
Premium
Zinc
100%Dose
25 mg
Target
15–30 mg
Form
Budget
Magnesium
100%Dose
425 mg
Target
100–400 mg
Form
Budget
Pro Testosterone Complex
1500 mgDoses not disclosed by manufacturer
Other Ingredients (10)
Artificial ColorsColorant
May trigger hyperactivity in sensitive children; potential link to allergic reactions
Artificial ColorsColorant
May trigger hyperactivity in sensitive children; potential link to allergic reactions
FD&C Yellow No. 6Colorant
May trigger sensitivity in some individuals; behavioral concerns in susceptible children
Titanium DioxideColorant
Banned in the EU (2022) over concerns that its ultra-fine particles may damage DNA in gut cells. Still allowed in the US. Used only for white coloring — provides no health benefit.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Calcium CarbonateBuffer
Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements
Dicalcium PhosphateBinder
Calcium and phosphorus compound used as binder
How to Take It
Best taken in the morning
The Vitamin B6 in it is what pulls this toward the morning. Take it with a meal containing fat — the vitamin D in it absorbs poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Dosage: Take a single pack daily for 21 straight days. On training days, take it 30-45 minutes before lifting. On non-training days, take it prior to bed. For best results, "cycle" this product following a schedule of three weeks on and one week off. Best results if used by those who are 25 years or older. However, due to its ability to help modulate free test levels, it could benefit others as well. Consider "stacking" Animal Stak with either Animal Test or Animal M-Stak for even greater gains. For more stacking information go to www.animalpak.com.
General guidance based on the ingredients, not a substitute for the label or your doctor.
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.