“If I eat less meat and choose plant protein, will my gym sessions still help me build muscle?” It is a common question when you want more plant-based options alongside strength training.
Plant protein can support muscle growth. The amount, the source and consistent training all matter. That does not establish that every plant protein works exactly like whey at every serving size. 2｜Plant-based diets and resistance training, 3｜Plant versus animal protein meta-analysis
Following our daily protein guide, this article looks at soy, pea and whey research, then considers practical choices for workdays, eating out and gym sessions in Hong Kong.
How do plant protein and whey differ?
Whey comes from milk; soy and pea proteins come from plants. All provide amino acids, but their essential amino acid profiles, digestibility and protein per serving can differ. Essential amino acids must come from the diet, and leucine helps initiate muscle protein synthesis. 6｜Review of plant proteins and exercise
A bowl of beans, a scoop of protein isolate and a ready-to-drink protein beverage are different servings. Start by checking how many grams of protein you actually consume and which ingredients supply it, then consider the rest of your diet.
What does the research show about muscle growth?
A 2021 study followed 38 young men who were habitual vegans or omnivores; their diets were not randomly assigned. Both groups consumed approximately 1.6 g of protein per kilogram of body weight daily, using soy supplementation in the vegan group and whey in the omnivorous group, alongside 12 weeks of resistance training.
Both groups improved muscle size and strength without significant between-group differences. This supports a well-planned, protein-sufficient plant-based diet during training. The small, male-only sample limits generalisation. 2｜Plant-based diets and resistance training
A broader 2025 review in Nutrition Reviews included 43 randomised trials, with 30 contributing to the muscle-mass meta-analysis. Overall findings slightly favoured animal protein, although 17 trials comparing soy with milk protein found no significant muscle-mass difference. 3｜Plant versus animal protein meta-analysis
No significant difference does not prove that every product or serving is equivalent. Participants, foods and training programmes varied across the evidence.
Can pea protein support muscle growth?
Pea has direct human research too. A 2015 randomised trial enrolled 161 men for 12 weeks of upper-body resistance training. Protein groups received 25 g of pea or whey protein twice daily. Biceps muscle-thickness gains did not differ significantly between those two groups. 4｜Pea versus whey training trial
This tested a particular isolate and dose, not a beverage containing 15 g of protein. It also does not establish that pea is superior to whey.
A 2026 review of 18 trials lasting at least six months found no significant differences in lean body mass or strength between plant and animal supplementation. However, 17 trials used soy and only three included exercise. It cannot establish the muscle-building effects of a pea-protein drink. 5｜Long-term supplementation meta-analysis
How can you include more plant protein in everyday meals?
For generally healthy adults who exercise regularly, ISSN guidance gives a daily reference range of 1.4–2.0 g of protein per kilogram of body weight, including all foods and drinks. Individual needs depend on training and overall diet. 1｜ISSN protein position stand
Look for the meal where a clear protein source is missing, then consider an adjustment:
- A rushed breakfast: consider soy milk or a soy-based food alongside toast, checking protein per serving across brands.
- Lunch out: consider adding tofu, firm bean curd or pulses to a vegetable-and-rice meal, taking the actual portion into account.
- The gap before dinner: if daily intake still falls short, a portable protein drink or snack can be convenient.
These are meal-planning ideas, rather than a nutritionally calculated vegan menu. See our protein intake guide for muscle growth for daily calculations and Hong Kong food examples.
Where do Sparklean and VOW protein bars fit?
If you prefer a drink that needs no mixing, VOW Sparklean provides pea protein in a sparkling format. For a snack, consider a VOW plant protein bar. The brand’s official nutrition tables give the following amounts per can or bar. 7｜Official Sparklean information, 8｜Official VOW bar information
| Product | Serving | Protein | Energy |
|---|---|---|---|
| Sparklean protein drink | 330 ml | 15 g | 80 kcal |
| VOW Salted Caramel bar | 48 g | 16 g | 179 kcal |
| VOW Cookies & Cream bar | 48 g | 15 g | 185 kcal |
| VOW Peanut Crunch bar | 48 g | 16 g | 179 kcal |
For example, if your meals and snacks leave you 15 g short of your chosen daily target, one Sparklean can supply that amount. This is an intake calculation, rather than a prediction of the muscle growth measured in a study.
When choosing a bar, consider calories, fat, carbohydrate and allergens too. VOW bars contain soy and pea protein; ingredients differ by flavour. Check the purchased pack carefully for soy, peanut and nut allergy information. Vegan does not mean suitable for every allergy. 8｜Bar ingredients and allergen information
Frequently asked questions
Can I choose plant protein if I am not vegan?
Yes. It can form part of a mixed diet. You can choose around taste, eating habits and any protein shortfall without changing to a fully vegan diet.
Is 15 g of protein enough for a whole meal?
Not necessarily. Include other foods in that meal and across the day. One product’s serving does not define your individual meal requirement.
Will a plant protein drink build muscle without weight training?
The training results discussed here were observed alongside resistance exercise. They cannot promise the same outcome from a drink alone. Establish consistent training and meals, then fill a dietary gap when needed. 2｜Diet and training study
This article provides general adult nutrition education and does not replace individual medical advice. If a health condition requires protein restriction, discuss your needs with a doctor or registered dietitian. These studies do not establish the clinical effects of individual VOW products. Product figures come from official brand information; check the purchased pack for ingredients, servings and allergens.
References
Jäger R, et al. (2017). ISSN position stand: protein and exercise. JISSN, 14, 20. Source
Hevia-Larraín V, et al. (2021). Protein-matched plant-based and omnivorous diets during resistance training. Sports Medicine, 51, 1317–1330. Source
Reid-McCann RJ, et al. (2025). Plant versus animal protein: a systematic review of muscle outcomes. Nutrition Reviews, 83, e1581–e1603. Source
Babault N, et al. (2015). Pea protein, whey and resistance training: a randomised trial. JISSN, 12, 3. Source
Yimam MA, et al. (2026). Long-term plant versus animal protein supplementation: systematic review and meta-analysis. Frontiers in Nutrition, 13, 1813846. Source
Kerksick CM, et al. (2021). Plant proteins and exercise adaptations: a review. Nutrients, 13, 1962. Source
VOW Nutrition. Sparklean Protein Drink — ingredients and nutritional information. Source
VOW Nutrition. VOW Vegan Protein Bar — ingredients and flavour-specific nutritional information. Source