BioStacks
Source Naturals

Proline & Lysine

4 Tablets · 30 servings · $0.57/serving

47 / 100Average

Best for

Score Breakdown

Formulation
54
Safety
87
Final score
47/100

Ingredients (10)

Vitamin C

100%

Dose

1000 mg

Target

250–2000 mg

Form

Standard

L-Lysine

100%

Dose

1100 mg

Target

1000–3000 mg

Form

Premium

L-Proline

100%

Dose

1100 mg

Target

500–2000 mg

Form

Grape Seed Extract

67%

Dose

100 mg

Target

150–600 mg

Form

Hawthorn Berry Extract

63%

Dose

100 mg

Target

160–900 mg

Form

Nutrition

Calories and macros.

  • Dietary Fiber1 g

Other Ingredients (5)

SorbitolSweetener

A FODMAP sugar alcohol that may trigger GI discomfort (bloating, gas) in individuals with IBS or sorbitol malabsorption, even at small amounts found in supplements. Avoided in low-FODMAP diets.

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

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

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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.