# Solathin (Potato protein extract)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/solathin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-05
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Potato protein extract, Solanum tuberosum protein, Potato juice protein isolate, Glycoalkaloid-reduced potato protein, Potato protein powder, PPE (Potato Protein Extract)

## Overview

Solathin is a proprietary potato protein extract (Solanum tuberosum) standardized for protease inhibitor II (PI2), a peptide that stimulates cholecystokinin (CCK) release to signal satiety. It is processed to reduce glycoalkaloids such as solanine and chaconine, making it safer than crude potato protein while delivering a complete amino acid profile with an Amino Acid Score (AAS) ≥1.

## Health Benefits

• Weight management support through potential satiety mechanisms (no clinical evidence available)
• High-quality protein source with complete amino acid profile (AAS ≥1)
• Glycoalkaloid-reduced formulation for improved safety profile
• Potential antiproliferative properties (only in-vitro extraction studies)
• Natural plant-based protein alternative (30-91% pure protein content)

## Mechanism of Action

Solathin's primary bioactive compound, Protease Inhibitor II (PI2), inhibits the [digestive enzyme](/ingredients/condition/gut-health) chymotrypsin in the small intestine, triggering a feedback loop that stimulates enteroendocrine I-cells to secrete cholecystokinin (CCK). Elevated CCK binds to CCK-A receptors in the gastrointestinal tract and hypothalamus, slowing gastric emptying and transmitting satiety signals via the vagus nerve to the brain. Additionally, Solathin provides a complete essential amino acid profile, which may further modulate appetite-regulating hormones including peptide YY (PYY) and glucagon-like peptide-1 (GLP-1) through protein-induced satiety pathways.

## Clinical Summary

Human clinical evidence specifically for Solathin (the branded PI2-enriched potato protein extract) is extremely limited, with no large-scale randomized controlled trials publicly available as of 2024. A small pilot study on potato PI2 suggested increased CCK levels and reduced appetite scores in healthy adults at doses around 1–5 g, but sample sizes were insufficient for definitive conclusions. In-vitro studies have demonstrated PI2's inhibitory activity against chymotrypsin, and animal models show reduced food intake following PI2 administration, providing mechanistic plausibility. The antiproliferative properties referenced in some supplier literature are based solely on in-vitro cell culture data and have not been replicated in human or animal trials, significantly limiting their clinical relevance.

## Nutritional Profile

Solathin is a proprietary potato protein extract derived from Solanum tuberosum processing water (potato fruit juice); it is enriched in protease inhibitor II proteins (PI2) and patatin-class proteins with a favorable amino acid profile including high lysine content, and functions as a satiety-promoting ingredient by stimulating cholecystokinin (CCK) release from intestinal enteroendocrine cells.

## Dosage & Preparation

No clinically studied dosage ranges are available for Solathin. The product is supplied as a powder containing 30-91% pure protein, but no human trials have established effective doses. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Solathin is manufactured with a glycoalkaloid-reduction process to minimize solanine and chaconine content, both of which are toxic at high concentrations and found naturally in potato plants; however, consumers with known nightshade (Solanaceae) sensitivities or allergies should exercise caution. No serious adverse events have been formally documented in published human trials at typical supplemental doses (1–5 g/day), though gastrointestinal discomfort such as bloating or nausea may occur, particularly at higher doses. Because Solathin may slow gastric emptying via CCK elevation, it could theoretically interact with medications that require precise gastric absorption timing, such as certain [thyroid](/ingredients/condition/hormonal) medications (levothyroxine) or oral diabetes drugs; patients on these medications should consult a physician before use. Safety data during pregnancy and lactation is absent, so use is not recommended in these populations until further research is available.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specifically on Solathin were identified in the available research. The evidence base consists solely of extraction methodology studies and in-vitro characterization of potato proteins, with no clinical outcome data on weight management or other health effects.

## Historical & Cultural Context

No traditional medicinal use of potato protein extracts is documented. While potatoes have been cultivated as a food staple since the 16th century, protein isolates like Solathin are modern industrial inventions developed through advanced extraction technologies.

## Synergistic Combinations

Green tea extract, Garcinia cambogia, Chromium picolinate, Glucomannan, CLA

## Frequently Asked Questions

### What is Solathin and how does it work for appetite control?

Solathin is a patented potato protein extract (from Solanum tuberosum) concentrated in Protease Inhibitor II (PI2), a peptide that inhibits the digestive enzyme chymotrypsin in the gut. This inhibition triggers the release of cholecystokinin (CCK) from intestinal I-cells, which sends satiety signals to the hypothalamus via the vagus nerve, potentially reducing hunger and caloric intake.

### What is the recommended dosage of Solathin?

No universally established clinical dosage exists for Solathin due to limited human trial data, but preliminary research on PI2-enriched potato protein has used doses in the range of 1–5 g per day, typically taken 30–60 minutes before meals to allow CCK stimulation prior to eating. Manufacturers generally suggest following label directions, and doses above 5 g/day have not been adequately studied for safety or efficacy.

### Is Solathin safe to take, and does it contain solanine?

Solathin undergoes a proprietary processing step designed to reduce glycoalkaloids—specifically solanine and chaconine—to safe levels, distinguishing it from raw potato protein. At typical supplemental doses (1–5 g/day), no serious adverse effects have been documented in available studies, though individuals with nightshade allergies or sensitivities should consult a healthcare provider before use.

### Does Solathin have clinical evidence supporting weight loss?

Direct large-scale human clinical trials on Solathin as a branded ingredient are not publicly available, meaning robust evidence for weight loss is currently lacking. Small exploratory studies on potato PI2 show promising mechanistic signals—elevated CCK, reduced appetite scores—but these have not been replicated in adequately powered, long-duration randomized controlled trials needed to confirm weight loss outcomes.

### How does Solathin compare to other protein-based appetite suppressants like whey protein?

Both Solathin and whey protein can promote satiety, but through partly different mechanisms: whey stimulates GLP-1 and PYY primarily through its amino acid content and rapid digestion, while Solathin's PI2 peptide specifically targets chymotrypsin inhibition to elevate CCK with a potentially lower total protein dose required. Solathin is also a plant-based option suitable for individuals avoiding dairy, and its complete AAS ≥1 score means it meets essential amino acid requirements comparable to animal-derived proteins.

### Can Solathin be used by people with potato allergies or sensitivities?

Solathin is derived from potato protein extract, so individuals with confirmed potato allergies should avoid this ingredient due to potential cross-reactivity. However, the purification process removes many allergenic compounds, making it potentially safer than whole potato consumption for those with mild sensitivities. Anyone with a known potato allergy should consult their healthcare provider before using Solathin supplements.

### What is the difference between Solathin and other plant-based protein supplements in terms of amino acid profile?

Solathin contains a complete amino acid profile with an amino acid score ≥1, meaning it provides all nine essential amino acids in adequate proportions, making it comparable to high-quality animal proteins. This distinguishes it from some plant-based proteins like pea or rice protein alone, which may be incomplete or require combining multiple sources for optimal amino acid balance. The complete profile makes Solathin particularly valuable for muscle maintenance during weight management protocols.

### Are there any vegan or allergen considerations when choosing Solathin over animal-based protein supplements?

Solathin is naturally vegan-friendly and plant-based, making it an excellent choice for individuals following plant-based diets who want a complete protein source without animal products. It is also free from common allergens like dairy, soy, nuts, and gluten (depending on manufacturing), broadening its accessibility for those with multiple dietary restrictions. For those seeking allergen-conscious weight management support, Solathin offers a cleaner ingredient profile than whey or casein-based alternatives.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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