Sports nutrition and gym equipment retail combines high-variant supplement products (protein powder in 20 flavours × 4 sizes = 80 variants) with large equipment items requiring freight shipping and strict safety specifications. Both product types have regulatory requirements — food supplements under UK food law and gym equipment under consumer safety standards. Shopify handles both categories well once configured correctly.

Sports nutrition product categories

Protein powders: Whey concentrate, whey isolate, casein, plant protein. Flavour and weight variants. High flavour counts make variant management important.
Pre-workouts: Stimulant and stimulant-free. Flavour and weight variants. Caffeine content and ingredient disclosure important.
Creatine and amino acids: Monohydrate, HCL. Flavour (flavoured vs unflavoured) and weight variants.
Weight management products: Meal replacement shakes, fat burners. Regulatory caution required on claims.
Vitamins and micronutrients: Individual vitamins, ZMA, iron, electrolytes. Capsule count and strength variants.
Snacks and bars: Protein bars, rice cakes. Box quantities and individual.
Equipment — small: Resistance bands, foam rollers, jump ropes, lifting belts, straps. Size and weight variants.
Equipment — large: Barbells, weight plates, dumbbells, benches, racks, cables. Weight/load capacity specs. Freight delivery required.
Sportswear: Gym clothing, compression garments. Size and colour variants.

Flavour × size variant strategy

Protein powder with 20 flavours × 4 sizes (500g, 1kg, 2kg, 5kg) = 80 variants, which is within Shopify's 100-variant limit. However, as ranges expand:

For products approaching or exceeding 100 variants, split by weight tier: create "Protein Powder 500g" and "Protein Powder 1kg" as separate products, each with flavour as the single variant
This also improves SEO: "vanilla protein powder 1kg" is a stronger search term than a generic "protein powder" with variant selection
Maintain consistent SKU format: PP-VAN-1KG, PP-VAN-2KG for easy inventory management

Sports nutrition metafields

product.metafields.nutrition.protein_per_serving_g = "25"
product.metafields.nutrition.calories_per_serving = "120"
product.metafields.nutrition.serving_size_g = "30"
product.metafields.nutrition.servings_per_container = "33"
product.metafields.nutrition.caffeine_per_serving_mg = "200"    // pre-workouts
product.metafields.nutrition.informed_sport_certified = "true"
product.metafields.nutrition.informed_sport_batch = "IS-B24031"
product.metafields.nutrition.suitable_for_vegetarians = "true"
product.metafields.nutrition.suitable_for_vegans = "false"      // whey
product.metafields.nutrition.allergens = "Milk, Soy (equipment in same facility)"
product.metafields.nutrition.banned_substance_tested = "true"

Informed Sport certification

Informed Sport is a third-party testing programme that certifies supplements are free from substances prohibited in sport. For stores selling to competitive athletes, this certification is a significant purchase driver:

Display the Informed Sport logo on certified products (use theme metafield block with badge image)
Include the batch certification code in the metafield — athletes can verify independently at Informed Sport's website
Clearly distinguish certified vs non-certified products in collections

UK food supplement regulation

Food supplements sold in the UK are regulated by the Food Supplements (England) Regulations 2003 (and equivalents) and the Food Safety Act 1990. Key requirements:

Nutrient content claims (e.g. "25g protein per serving") are factual statements, not health claims — permitted
Health claims (e.g. "builds muscle") are regulated under UK food law. Only authorised health claims may be used. Most muscle-building claims for protein are not on the authorised list.
Novel ingredients: some sports nutrition ingredients (SARMs, peptides, certain stimulants) are not permitted as food supplements in the UK. Review the FSA Novel Food Catalogue before migration.
Maximum nutrient levels: some vitamins and minerals have upper safe levels that affect permitted dosage per serving

Gym equipment specifications

product.metafields.equipment.weight_capacity_kg = "250"
product.metafields.equipment.product_weight_kg = "45"
product.metafields.equipment.dimensions_cm = "120x60x100"
product.metafields.equipment.assembly_required = "true"
product.metafields.equipment.assembly_time_min = "30"
product.metafields.equipment.floor_space_required_cm = "180x120"
product.metafields.equipment.steel_gauge = "11"             // weight benches, racks
product.metafields.equipment.warranty_years_frame = "10"
product.metafields.equipment.warranty_years_parts = "2"
product.metafields.equipment.ce_certified = "true"          // EU/UK consumer safety

Freight for large gym equipment

Barbells, racks, and benches require pallet or specialist freight delivery. In Shopify:

Create a "Heavy equipment" shipping profile with freight-only rates
Tag equipment over a weight threshold (e.g. >30kg) with freight-delivery and assign to this profile
Consider a "contact for delivery quote" rate for very large commercial equipment
Weight plates sold in sets: the total order weight (4 × 20kg plates = 80kg) must trigger correct freight rates — set product variant weights accurately

Post-migration checklist for sports nutrition and gym stores

Protein powder variants: flavour count × size count checked against 100-variant limit
Nutrition facts metafields populated (protein, calories, servings)
Informed Sport certification badge and batch number on certified products
Product descriptions reviewed for non-authorised health claims
Allergen information in metafields for all food products
Large equipment assigned to freight shipping profile
Equipment weight capacity and dimensions as metafields
CE certification flag on applicable gym equipment
Weight plates: variant weight set accurately (affects freight rate calculations)

Migrating a sports nutrition and gym equipment store from WooCommerce to Shopify (2026)