Huel and Soylent are the two most recognizable "complete meal replacement" brands in the market. Both deliver approximately 400 calories per serving. Both are designed to fully replace meals. Both are marketed to busy professionals who want nutrition without cooking. But beneath the surface-level similarities, the ingredient quality gap between them is enormous. One uses oats, flaxseed, and methylated vitamins. The other uses maltodextrin, seed oils, and the cheapest vitamin forms available. Here's the complete breakdown.
The Quick Comparison
| Category | Huel Black Edition | Soylent |
|---|---|---|
| Price/Serving | $2.12 | $3.25 |
| Calories | 400 | 400 |
| Protein | 40g ✅ | 20g |
| Fiber | 7g ✅ | 3g |
| Primary Carb | Oats (GI ~55) ✅ | Maltodextrin (GI 85-105) ⚠️ |
| Fat Sources | Flaxseed, coconut ✅ | Canola + Sunflower oil ⚠️ |
| Folate | L-Methylfolate ✅ | Folic acid ⚠️ |
| Vitamin K2 | MK-7 ✅ | Not included ⚠️ |
| Vitamin D | D3 (100% DV) ✅ | D2 (inferior form) ⚠️ |
| Seed Oils | None ✅ | Two (canola + sunflower) ⚠️ |
| Protein Source | Pea + rice | Soy isolate (hexane) |
| Added Sugar | 1g | 9g ⚠️ |
| Overall Score | 7.2/10 | 5.5/10 |
Same Calories, Different Universes
Both products deliver 400 calories per serving, but how they build those calories could not be more different:
Huel's 400 Calories Come From:
Oats (slow-release carbohydrates with a glycemic index around 55), pea protein, brown rice protein, flaxseed (providing omega-3 ALA fatty acids), and coconut oil. These are whole food and minimally processed sources with functional nutrition beyond just macronutrients. The oats deliver beta-glucan fiber for heart health. The flaxseed provides anti-inflammatory omega-3s. Even the carbohydrate calories are doing nutritional work.
Soylent's 400 Calories Come From:
Maltodextrin (a processed starch with a glycemic index of 85-105, higher than table sugar), soy protein isolate (likely hexane-extracted), canola oil, and sunflower oil. These are cost-optimized, industrially processed ingredients selected for price and shelf stability, not nutritional quality. The carbohydrate calories are doing metabolic damage, not nutritional work.
Protein: 40g vs 20g at a Lower Price
Huel delivers double the protein at a lower price point. Let that sink in. You get 40g of plant-based protein from pea and brown rice for $2.12, or 20g of hexane-extracted soy protein isolate for $3.25.
Protein Quality Matters Too
Beyond quantity, Huel's protein sources are cleaner:
- Pea protein is produced through water-based extraction, with no chemical solvents required
- Brown rice protein is similarly produced without hexane
- Soy protein isolate (Soylent's source) is typically produced using hexane, an industrial chemical solvent derived from petroleum. The FDA considers residual hexane in food products safe at current levels, but many consumers and health-conscious buyers prefer to avoid hexane-processed ingredients entirely
The Carbohydrate Problem: This Is the Single Biggest Differentiator
Huel uses oats as its primary carbohydrate source. Oats are a whole grain with a glycemic index around 55, delivering sustained energy over hours rather than minutes. Oats contain beta-glucan, a soluble fiber that has been clinically shown to reduce LDL cholesterol, improve gut bacteria diversity, and moderate blood sugar response. Oats are arguably the most evidence-backed functional food in existence.
Soylent uses maltodextrin as its primary carbohydrate source. Maltodextrin is a heavily processed starch with a glycemic index of 85-105. To put that in perspective:
- White bread: GI ~75
- Table sugar (sucrose): GI ~65
- Maltodextrin: GI 85-105
Maltodextrin spikes blood sugar faster and higher than table sugar. For anyone concerned about metabolic health, insulin sensitivity, diabetes risk, or even sustained energy levels, choosing maltodextrin as the primary carbohydrate source is a fundamental design failure. This isn't a minor ingredient difference. It's the caloric backbone of the entire product.
Why does Soylent use maltodextrin? Cost and convenience. It's cheap, dissolves easily, has a neutral flavor, and extends shelf life. It's an engineering solution to a manufacturing problem, not a nutrition solution to a health problem.
Fats: Omega-3s vs Industrial Seed Oils
Huel uses flaxseed (the richest plant source of omega-3 ALA fatty acids) and coconut oil (medium-chain triglycerides). The flaxseed provides anti-inflammatory omega-3s, while coconut oil provides MCTs that are metabolized differently from long-chain fatty acids, potentially supporting energy and cognitive function.
Soylent uses canola oil and sunflower oil, two industrial seed oils that are high in omega-6 fatty acids. Together, they provide approximately 21g of fat per serving, which means nearly half of Soylent's 400 calories come from industrial seed oils. The omega-6 to omega-3 ratio in the standard Western diet is already estimated at 15:1 to 20:1, far above the recommended 2:1 to 4:1 range. Adding 21g of omega-6-rich oils daily pushes this ratio further into inflammatory territory.
Vitamin Quality: Premium Forms vs Budget Forms
Huel uses several premium vitamin forms that cost more to source but provide meaningfully better bioavailability:
- L-Methylfolate (5-MTHF) instead of folic acid. The active form of folate that works for everyone, including the 40% of the population with MTHFR variants who struggle to convert synthetic folic acid.
- Vitamin K2 MK-7, the superior K2 form with a longer half-life in the body, supporting bone mineral density and cardiovascular health. Soylent doesn't include K2 at all.
- Vitamin D3 at 100% DV, the form identical to what your skin produces from sunlight. Significantly more effective than Soylent's D2 form.
Soylent uses all-synthetic, bottom-shelf vitamin forms: folic acid, no K2, Vitamin D2, and cyanocobalamin. Every vitamin choice is the cheapest available option. For a product that markets itself as "complete nutrition," this is a significant shortcoming.
Fiber: Functional vs Negligible
Huel: 7g of fiber primarily from oats and flaxseed. This is functional, whole-food fiber that provides genuine digestive benefit, supports microbiome diversity, promotes satiety, and helps regulate blood sugar response. 7g represents roughly 25-28% of the daily recommended intake.
Soylent: 3g of fiber. While not zero, 3g provides minimal functional benefit. It represents roughly 10-12% of daily needs, which is not enough to meaningfully impact satiety, digestion, or gut health.
Added Sugar: 1g vs 9g
Huel contains 1g of added sugar per serving. Soylent contains 9g from maltodextrin and isomaltulose combined. Over a month of daily use, that's 30g vs 270g of added sugar. Nine times more. For a product designed for daily consumption, this cumulative difference is significant.
Company and Brand Context
Huel was founded in 2015 by Julian Hearn in the UK with a mission centered on sustainable, nutritionally complete food. The company has been profitable, transparent about its ingredients and sourcing, and is pending a $1.2 billion acquisition by Danone.
Soylent was founded in 2013 by Rob Rhinehart, a software engineer who wanted to optimize human nutrition like a coding problem. The company has gone through significant turbulence: an FDA warning letter in 2016, a voluntary bar recall the same year, multiple leadership changes, and was acquired by Starco Brands in 2024 after previous VC-backed growth failed to achieve profitability. The brand retains strong recognition in tech circles but has struggled to expand beyond its niche.
Frequently Asked Questions
If both are 400 calories, can I just swap one for the other?
You can, but you'd be trading 20g of protein for 40g, trading 3g of fiber for 7g, trading seed oils for omega-3s, trading maltodextrin for oats, and paying 53% more for the downgrade. The calorie match is the only thing they have in common.
Is Soylent really that bad?
It's not dangerous. The FDA considers all of Soylent's ingredients safe. The issue is that "safe" and "optimal" are very different standards. Every major ingredient choice in Soylent (maltodextrin, seed oils, soy isolate, synthetic vitamins) represents the cheapest available option, not the best one. For a product you consume daily, these compounding suboptimal choices add up.
What about Soylent's RTD convenience?
This is Soylent's genuine advantage. Ready-to-drink bottles require zero preparation: no blender, no measuring, no cleanup. If you're grabbing something from a convenience store, Soylent is there and Huel isn't. For pure grab-and-go convenience, Soylent wins. Whether that convenience justifies the nutritional trade-offs depends on your priorities.
Which is better for athletes or active people?
Huel, clearly. 40g of protein supports muscle protein synthesis better than 20g. 7g of fiber supports sustained energy better than 3g. Oats provide steady-release carbohydrates while maltodextrin creates a spike-and-crash cycle. And omega-3s from flaxseed support recovery while omega-6s from seed oils promote inflammation. Every dimension favors Huel for active individuals.
Will Huel change after the Danone acquisition?
Possible. Corporate acquisitions of nutrition brands sometimes lead to cost-cutting reformulations. However, at a $1.2 billion acquisition price, Danone is buying Huel's current brand positioning and consumer trust. Reformulating the product would undermine the value they're paying for. Monitor the ingredient panel post-acquisition.
Bottom Line
Huel is the clear winner on virtually every measurable dimension: 2x the protein, better carb sources, no seed oils, superior vitamin forms, 2.3x the fiber, 9x less added sugar, and a lower price. The 1.7-point score gap (7.2 vs 5.5) is one of the largest in our review lineup because the nutritional differences are real and significant.
Soylent's only genuine advantages are RTD convenience and brand recognition in tech circles. If your purchasing decision is based on nutrition per dollar, this comparison isn't close. Huel costs 35% less and delivers meaningfully better nutrition across the board.
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